博士(工学）, 山口大学

Microwave and Millimeterwave Engineering

Circuit Engineering

マイクロ波・ミリ波工学

回路工学

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Electronic devices and equipment

26 Sep. 2017
明治大学, 非常勤講師

01 May 2010
青山学院大学, 招聘研究員

01 Apr. 2006 - 31 Mar. 2008
明治大学, 非常勤講師

01 Apr. 2007 - 30 Sep. 2007
東京農工大学, 非常勤講師

11 Sep. 2006 - 29 Jan. 2007
工学院大学, 非常勤講師

Apr. 2004
電気通信大学

Apr. 1999 - Mar. 2004
青山学院大学, 助手

Mar. 1999
山口大学大学院, 理工学研究科, システム工学専攻

Mar. 1991
近畿大学, 理工学部, 電子工学科

Mar. 1987
近畿大学付属高等学校, 普通科

Jan. 2024
IEEE CAS SocietyJapan Joint Chapter
欠陥接地構造と抵抗装荷による広帯域な吸収型マイクロストリップ線路 コモンモードフィルタに関する検討
IEEE CAS SocietyJapan Joint Chapter Best Student Award, Akihiko Narushima

Jan. 2024
電子情報通信学会 回路とシステム研究会
欠陥接地構造と抵抗装荷による広帯域な吸収型マイクロストリップ線路
学生優秀賞, 成島章太

Sep. 2021
電子情報通信学会 エレクトロニクスソサイエティ
チップキャパシタ結合型共有共振器を用いた広い離調幅をもつ小型ダイプレクサの検討
2020年度(令和2年度)エレクトロニクスレター論文賞, 小野哲;和田光司
Official journal

Mar. 2021
電子情報通信学会マイクロ波研究会
超小型バンドパスフィルタ
2020年度学生マイクロ波回路設計試作コンテスト優秀賞, 和田;小野研究室;髙橋拓海
Japan society, Japan

Mar. 2021
電子情報通信学会マイクロ波研究会
高減衰バンドパスフィルタ
2020年度学生マイクロ波回路設計試作コンテスト優秀賞, 和田;小野研究室;宮腰就也
Japan society, Japan

Jan. 2021
電子情報通信学会
"BSTバラクタを装荷した非対称ヘアピン型共振器を用いた結合係数調整が容易なチューナブルBPFとその分波回路への応用
回路とシステム研究会 2020年学生優秀賞, 荻久保暖香;小野 哲;和田光司
Japan society

Jan. 2021
電子情報通信学会
"不要モード抑制を目的としたEBG構造における等価回路の高精度化及び小型PRGW構造BPFの設計に関する検討"
回路とシステム研究会 2020年学生優秀賞, 古谷佳祐;小野 哲;和田光司
Japan society

Nov. 2019
MWE2019実行委員会
優秀アイデア創出賞
MWE 2019 アイデアソン, 和田;小野研究室;内田雄吾
Japan society, Japan

Sep. 2019
電子情報通信学会マイクロ波研究会
最優秀賞
2019学生マイクロ波回路設計試作コンテスト, 和田;小野研究室;周威宇
Japan society, Japan

Sep. 2019
電子情報通信学会マイクロ波研究会
優秀賞
2019学生マイクロ波回路設計試作コンテスト, 和田;小野研究室;内田雄吾
Japan society, Japan

Nov. 2018
2018 Asia-Pacific Microwave Conference
APMC Student and Young Engineer Design Competitions, 和田;小野研究室;松村太郎
International society, Japan

Nov. 2018
2018 Asia-Pacific Microwave Conference
APMC Student and Young Engineer Design Competitions, 和田;小野研究室;筑紫友洋
International society, Japan

Sep. 2017
電子情報通信学会マイクロ波研究会
（帯域阻止フィルタ(BRF)部門：優秀賞）
学生マイクロ波回路設計試作コンテスト, 和田;小野研究室;中村流星
Japan society, Japan

Sep. 2017
電子情報通信学会マイクロ波研究会
（高域通過フィルタ(HPF)部門：最優秀賞）
学生マイクロ波回路設計試作コンテスト, 和田;小野研究室;阿部 励
Japan society, Japan

Sep. 2017
電子情報通信学会マイクロ波研究会
（低域通過フィルタ(LPF)部門：最優秀賞）
学生マイクロ波回路設計試作コンテスト, 和田;小野研究室;横山達也
Japan society, Japan

Apr. 2017
東工大MCRG/電通大AWCC オープンハウス2017 ポスター優秀発表賞, 和田;小野研究室
Others, Japan

Dec. 2016
MWE2016実行委員会
MWE2016マイクロウェーブ展 大学展示コンテスト 優秀賞, 和田光司;小野哲研究室
Japan society, Japan

Mar. 2016
電子情報通信学会
集中定数素子で構成した3モード共振器を用いた有極形チューナブルBPFに関する検討
東京支部学生会研究発表会学生奨励賞, 大塚喬太;川俣雅寿;和田光司
Japan society, Japan

Dec. 2015
電子情報通信学会マイクロ波研究会
「リング共振器で構成されたLPFと有極型結合線路BPFを用いた小型ダイプレクサに関する検討」
学生研究会優秀発表賞, 和田研究室;岩本功貴
Japan society, Japan

Dec. 2015
電子情報通信学会マイクロ波研究会
「分布定数線路と集中定数素子で構成したCRLH伝送線路共振器を用いた有極形マルチバンド帯域通過フィルタに関する検討」
学生研究会優秀発表賞, 和田研究室;双石 文彦
Japan society, Japan

Sep. 2015
電子情報通信学会マイクロ波研究会
（小型化部門：最優秀賞）
学生マイクロ波回路設計試作コンテスト, 和田研究室;川俣雅寿
Japan society, Japan

Sep. 2015
電子情報通信学会マイクロ波研究会
（低損失部門：最優秀賞）
学生マイクロ波回路設計試作コンテスト, 和田研究室;林和幸
Japan society, Japan

Sep. 2015
電子情報通信学会マイクロ波研究会
（50dB減衰部門：優秀賞）
学生マイクロ波回路設計試作コンテスト, 和田研究室;大塚喬太
Japan society, Japan

May 2014
エレクトロニクス実装学会
SAWフィルタとLTCC基板を用いた広帯域フィルタで構成した高周波分波回路の開発と試作評価
エレクトロニクス実装学会 技術賞, 和田光司;通信大;勝本達也;大島心平;小山工業高等専門学校;村田龍司;海老原均

Oct. 2011
電子情報通信学会
マイクロ波研究会学生発表会優秀発表賞

Sep. 2010
電子情報通信学会
マイクロ波研究会学生発表会優秀発表賞

Mar. 2010
電子情報通信学会
電子情報通信学会東京支部学生大会優秀発表賞

Mar. 2009
電子情報通信学会
電子情報通信学会エレクトロニクスソサイエティ活動功労表彰

Apr. 2006
船井情報科学振興財団
平成17年度船井情報科学奨励賞
Japan

Aug. 2003
電気学会平成14年Ｃ部門研究会優秀論文発表賞

Apr. 2003
21世紀センター・オブ・エクセレンスプログラム（COE）採択に対する表彰：研究拠点リーダー他15名（青山学院大学）

Sep. 2002
電子情報通信学会通信ソサイエティ活動功労感謝状授与

Mar. 1999
電子情報通信学会学術奨励賞

Aug. 1998
China-Japan Joint Meeting on Microwaves (CJMW 98) Prize

Oct. 1997
電子情報通信学会中国支部奨励賞

The Design Method of Compact Mutiplexer based on New Substrate Integrated Defected Ground Structure
Weiyu Zhou; Koji Wada; Kenichi Ohta
Transactions of The Japan Institute of Electronics Packaging, Japan Institute of Electronics Packaging, 16, E23-001-1-E23-001-13, 25 Dec. 2023, Peer-reviwed
Scientific journal

Planar Quadruplexer with Adjacent Passbands Using Bandpass Filters Based on Dual-path Hairpin Resonators
Kosei Tanii; Koji Wada
Transactions of The Japan Institute of Electronics Packaging, Japan Institute of Electronics Packaging, 16, E22-006-1-E22-006-8, 25 Dec. 2023, Peer-reviwed
Scientific journal

A New SIDGS-Based Tunable BPF Design Method with Controllable Bandwidth
Weiyu ZHOU; Koji WADA
IEICE Transactions on Electronics, Institute of Electronics, Information and Communications Engineers (IEICE), E106.C, 10, 614-622, 01 Oct. 2023, Peer-reviwed
Scientific journal

IR-UWB Reader for Credit Card-Sized NFC Chipless RFID Tag using Asymmetrical Stepped Impedance Resonators
F.Sakai; K.Wada; M.Makimoto
European Microwave Week 2023 ,EuMC34-5,(EuMW 2023), Sep. 2023, Peer-reviwed
International conference proceedings

A multi-layer SIW resonator loaded with asymmetric E-shaped slot-lines for a miniaturized tri-band BPF with low radiation loss
Weiyu Zhou; Satoshi Ono; Koji Wada
IEICE Transactions on Electronics, Manuscript ID: 2021ECP5033, 01 Jul. 2022, Peer-reviwed
Scientific journal, English

電気通信大学における出張講義による高大接続の取り組み―実施状況・特長、アンケート調査―
三宅貴也; 大野裕子; 山路浩夫; 中村裕樹; 和田光司
電気通信大学紀要, Vol.34, 53-62, 01 Feb. 2022, Peer-reviwed
Research institution, Japanese

入学者選抜の改革とアンケート調査 ―卒業研究指導教員への学生評価に関する調査の比較分析を中心に―
山路浩夫; 湯山加奈子; 三宅貴也; 中村裕樹; 和田光司
電気通信大学紀要, Vol.34, 39-47, Feb. 2022, Peer-reviwed
Research institution, Japanese

Tunable diplexer composed of asymmetric hairpin resonators using varactors with constant passband bandwidth and high isolation characteristics
Haruka Ogikubo; Satoshi Ono; Koji Wada
The Japan Institute of Elctronics Packaging, Vol.14, No, E20-012-1-E20-012-11, Dec. 2021, Peer-reviwed
Scientific journal, English

Compact dual-band BPF composed of LC J-inverters using lumped elements
Taro Matsumura; Satoshi Ono; Koji Wada
The Japan Institute of Elctronics Packaging, Vol.14, E20-014-1-E20-014-10, Dec. 2021, Peer-reviwed
Scientific journal, English

Realization of Rectangular Frequency Characteristics by the Effects of a Low-Noise Amplifier and Flat Passband Bandpass Filter
Tomohiro Tukushi; Satoshi Ono; KojiWADA
Transactions on Electronics, E104-C/ 10, Oct. 2021, Peer-reviwed
Scientific journal, English

品質工学に基づいた2 GHz帯ローパスフィルタの2段階設計および許容差設計
小野 哲; 今井勇太; 和田 光司
電子情報通信学会和文論文誌(A), Vol. J104-A, No.9, 204-203, Sep. 2021, Peer-reviwed
Scientific journal, Japanese

高大接続改革の現状と卒業研究指導教員への卒業時の学生評価アンケート調査について
山路浩夫; 湯山加奈子; 三宅貴也; 中村裕樹; 和田光司
電気通信大学紀要, Vol.33, 18-25, Feb. 2021, Peer-reviwed
Research institution, Japanese

High Isolation Characteristics between Two Channels using LPF-HPF Diplexer Composed of Chip and Pattern Elements
Shohei Sakai; Satoshi Ono; Koji Wada
Transactions of The Japan Institute of Elctronics Packaging, Vol. 13, E19-019-1-E19-019-10, Dec. 2020, Peer-reviwed
Scientific journal, English

Bandpass Filter with Flat Passband and Transmission Zeros Using Parallel-Connected Resistor Loaded Hairpin-Shaped Resonators
Tomohiro Tukushi; Satoshi Ono; KojiWADA
IEICE Electronics Express (ELEX), IEICE, Vol.17, No.22, p.20200320, 19 Oct. 2020, Peer-reviwed
Scientific journal, English

Design of compact diplexer using CRLH-TL resonators
Satoshi Ono; Fumihiko Kurabeishi; Koji Wada
Journal of Japan Institute of Electronics Packaging, Japan Institute of Electronics Packaging, 23, 6, 533-538, 01 Sep. 2020, This paper first discusses a design for a compact resonator using a Composite Right/Left-Handed Transmission Line (CRLH-TL). Moreover, an All-resonator type diplexer using proposed resonators is designed and fabricated. The measured frequency characteristics for the fabricated diplexer are mostly in agreement with an electromagnetic (EM) simulated one. The size of the measured diplexer is 6.3 mm × 4.35 mm (0.068λg × 0.047λg), which is much smaller than other compact diplexers.
Scientific journal, Japanese

Near-Field Credit Card-Sized Chipless RFID Tags Using Higher-Order Mode Resonance Frequencies of Transmission Line Resonators
Fuminori Sakai; Mitsuo Makimoto; Koji Wada
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences,, Vol.E103-A, No.9, 1001-1010, Sep. 2020, Peer-reviwed
Scientific journal, English

CRLH 伝送線路共振器を用いた小型ダイプレクサの設計
小野 哲; 双石文彦; 和田 光司
エレクトロニクス実装学会誌, Vol. 23, No.6, 533-538, Sep. 2020, Peer-reviwed
Scientific journal, Japanese

チップキャパシタ結合型共有共振器を用いた広い離調幅を持つ小型ダイプレクサの検討
小野 哲; 和田 光司
電子情報通信学会和文論文誌(C), Vol. J103-C, No.8, 366-367, Aug. 2020, Peer-reviwed
Scientific journal, Japanese

A Wide-Stopband Microstrip Bandpass Filter Using Stepped Impedance Resonators with Open-Circuited Stubs and Asymmetric Coupling Structure
Longfei Yi; Satoshi Ono; Koji Wada
Transactions of The Japan Institute of Elctronics Packaging, Vol. 13, E19-016-01-E19-016-13, May 2020, Peer-reviwed
Scientific journal, English

パッチアンテナとλ/2 共振器を用いた積層サスペンデッドマイクロストリップ線路アンテナフィルタの設計
横山 達也; 小野 哲; 和田 光司
エレクトロニクス実装学会誌, Vol.22, No.6, 574-578, Sep. 2019, Peer-reviwed
Scientific journal, Japanese

Near-field chipless RFID tag system using inductive coupling between a multimode resonator and detection probes
Fuminori Sakai; Mitsuo Makimoto; Koji Wada
IEICE Transactions Online, Vol.E102-B, No.4, 722-731, Apr. 2019, Peer-reviwed
Scientific journal, English

チップキャパシタ装荷型結合線路共振器を用いた2GHz帯超小型BPF
小野 哲; 川俣 雅寿; 和田 光司
電子情報通信学会和文論文誌(C), Vol. J102-C, No.5, 186-195, Apr. 2019, Peer-reviwed
Scientific journal, Japanese

Design of multi-layered suspended microstrip line type antenna-filter using patch antenna and λ/2 resonator
Tatsuya Yokoyama; Satoshi Ono; Koji Wada
Journal of Japan Institute of Electronics Packaging, Japan Institute of Electronics Packaging, 22, 6, 574-578, 2019, This paper shows a design method for an Antenna-filter using a multi-layered suspended microstrip line (ML-SMSL) structure. The equivalent circuits using J-inverters, which are able to compensate for the elements of unwanted electromagnetic couplings, are introduced when the design parameters for the Antenna-filter with the ML-SMSL structure are calculated. Although the measured reflection characteristics for the fabricated Antenna-filter are a little different from those for the electromagnetic (EM) simulated one, the characteristics of radiation gain for the fabricated Antenna-filter are very close to those for the EM simulated one.
Scientific journal, Japanese

チップキャパシタ結合型共有共振器を用いた小型ダイプレクサの設計と試作
小野哲; 和田光司
電子情報通信学会和文論文誌(C), Vol.J101-C, No.12, 479-488, Dec. 2018, Peer-reviwed
Scientific journal, Japanese

Design and Detection of Chipless RFID Tags Using Stepped Impedance Resonators with Short-circuited Ends
Fuminori Sakai; Mitsuo Makimoto; Koji Wada
Transactions of The Japan Institute of Electronics Packaging, Vol. 11, E18-001-1, ---, Dec. 2018, Peer-reviwed
Scientific journal, English

Unloaded quality factor for hairpin resonator affected by conduction and radiation losses on K-band
Satoshi Ono; Koji Wada
Transactions of The Japan Institute of Electronics Packaging, Vol. 11, E18-002-1, ---, Dec. 2018, Peer-reviwed
Scientific journal, English

Design and fabrication of 3-poleBPF configured by hairpin resonators and different types of coupling and feed types at 20 GHz
S.Ono; K.Wada
2018 Asia pacific microwave conference (APMC2018), -, -, Nov. 2018, Peer-reviwed
International conference proceedings, English

Simulational Approach to Realize a Triplexer Based on Bandpass Filters Using Wideband Resonators
Kosei Tanii; Koji Wada
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E99C, 7, 751-760, Jul. 2016, Peer-reviwed, A triplexer is presented by using bandpass filters (BPFs) which consist of two-stage of wideband resonator and additional open-circuited stubs. The resonator is firstly proposed by using a coupled-line and an inductive element loaded transmission line. This resonator produces the wide passband by a dual-mode resonance, high attenuation level at stop-bands, and the steepness at the edge of the passband due to the attenuation poles. In order to understand the behavior of the resonator, the conditions for resonances and attenuation poles are especially solved and their current densities are analyzed by an electromagnetic simulation. Secondly, three types of wideband BPFs are constituted and finally a wideband triplexer is composed by using these BPFs. The basic characteristics of the proposed BPFs and the matching methodology enable to realize the triplexer whose desired passbands are around 3.1-5.1 GHz, 5.85-7.85 GHz, and 8.6-10.6 GHz with high isolation performance at the other passbands. The proposed triplexer is predominance in the flexible bandwidth or wide operating frequency range. All the BPFs and the triplexer are implemented on a planar printed circuit board assuming the use of the microstrip line structure.
Scientific journal, English

左手系伝送線路BPFと右手系伝送線路BSFにおける回路変形に関する一検討
谷井宏成; 和田光司; 大野貴信
電子情報通信学会和文論文誌(C), Vol.J99-C,, No.4, 166-170, Apr. 2016, Peer-reviwed
Scientific journal, Japanese

A study on a coding method for chipless RFID tags using multimode stepped impedance resonators
Fuminori Sakai; Mitsuo Makimoto; Koji Wada
IEICE ELECTRONICS EXPRESS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, 13, 4, 1-12, Feb. 2016, Peer-reviwed, Stepped impedance resonators (SIRs) are composed of multiple transmission lines having different characteristic impedances, and can control higher-order mode resonance frequencies. Here, by using these properties, identification codes from a resonator were systematically generated by introducing symmetric multimode SIRs composed of same-length transmission lines. In the other direction, resonator codes were identified by detecting their higher-order mode resonance frequencies. This paper describes these resonance properties and experimental results from multimode SIRs, and discusses their applicability in chipless RFID tags.
Scientific journal, English

Multimode Stepped Impedance Resonators and Their Application in Chipless RFID Tags
Fuminori Sakai; Mitsuo Makimoto; Koji Wada
2016 46TH EUROPEAN MICROWAVE CONFERENCE (EUMC), IEEE, -, -, 604-607, 2016, Peer-reviwed, Stepped impedance resonators (SIRs) arc composed of multiple transmission lines with different characteristic impedances and can control higher-order mode resonance frequencies. Here, identification codes from a resonator were systematically generated by utilizing these properties and introducing symmetric multimodc SIRs composed of transmission lines of uniform length. In the other direction, resonator codes were identified by detecting their higher-order mode resonance frequencies. This paper describes these resonance properties and experimental results for multimode SIRs and presents a frequency detection method using electromagnetic probes. The experimental data show that the proposed method is applicable to a chipless RFID tag system.
International conference proceedings, English

A Design Method of Matching Circuits for a Compact Diplexer Using SAW Filters
Shinpei Oshima; Tomonori Oshima; Koji Wada
2016 International Conference on Electronics Packaging (ICEP), IEEE, Vol. 11, E17-015-1, 23-26, 2016, Peer-reviwed, Recently, multiband wireless communication systems are widely used worldwide. The diplexers which can separate two frequency bands are very important circuits for these systems. In this paper, we describe a design method of matching circuits which are comprised of four lumped elements for a compact diplexer. It is suitable for the diplexers which are fabricated on a printed circuit board (PCB). The designed diplexer can consist of chip capacitors, chip inductors and SAW filters on the PCB. A prototype diplexer for W-CDMA Band V Rx and GPS is fabricated using this method. Insertion losses are less than 2.2 dB and isolation is higher than 48 dB. It also achieves a compact size (8 x 8 mm).
International conference proceedings, English

チューナブル特性を有する結合線路共振器を用いた小型マイクロストリップ線路BPFに関する一検討
川俣雅寿; 和田光司
電子情報通信学会和文論文誌(C), Vol.J98-C, No.12, 421-429, Dec. 2015, Peer-reviwed
Scientific journal, Japanese

マルチホップ無線電力伝送における電力分配比率の設定と切り替えに関する検討
早馬道也; 和田光司
電子情報通信学会和文論文誌(B), Vol.J98-B, No.10, 1137-1145, Oct. 2015, Peer-reviwed
Scientific journal, Japanese

Heuristic Circuit Transformation Based on Left-handed Filter and Right-handed Filter
Kosei Tanii; K.Wada; Takanobu Ohno
Progress in Electromagnetics Research Symposium (PIERS2015), -, -, 09 Jun. 2015, Peer-reviwed
International conference proceedings, English

Development of high frequency multiplexers using a SAW filter and an LTCC-based bandpass filter
Koji Wada; Tatsuya Katsumoto; Shinpei Oshima; Ryuji Murata; Hitoshi Ebihara
Journal of Japan Institute of Electronics Packaging, Japan Institute of Electronics Packaging, 18, 1, 66-72, 2015, This paper summarizes low temperature co-fired ceramic (LTCC)-based high frequency multiplexers which we have developed. We first discuss a diplexer and a triplexer using LTCC-based wide-band filters. We also discuss a multiplexer using a surface acoustic wave (SAW) filter and an LTCC-based wide-band filter. The characteristics of the proposed multiplexers are evaluated by simulation and experiment.
International conference proceedings, Japanese

SAWフィルタと低温同時焼成セラミック基板で構成した広帯域BPFを用いた高周波分波回路の開発
和田光司; 勝本達也; 大島心平; 村田龍司; 海老原均
エレクトロニクス実装学会誌, Vol.18, No.1, 66-72, Jan. 2015, Peer-reviwed
Scientific journal, Japanese

Wideband Bandpass Filter Composed of Dual-Path Resonators Using Coupled-Line and Transmission Line With Inductive Elements
牧本三夫; 和田光司
電気通信大学紀要, 電気通信大学, Vol.26, 1, 41-54, Mar. 2014, Peer-reviwed, Half-wave stepped impedance resonators (SIRs), which are composed of plural transmission lines having different characteristic impedance, have been put into practical use in microwave circuits as basic resonant elements. However, research and developing works for SIR have been carried out mainly using combination of single transmission lines. This paper describes six types of SIR structure composed of a single-line and coupled-lines. The generalized resonance conditions are derived from transmission line circuit theory, and then basic properties of resonators are analyzed based on these equations. Finally applicable circuits using these resonators are also discussed.
Research institution, Japanese

Wideband Bandpass Filter Composed of Dual-Path Resonators Using Coupled-Line and Transmission Line With Inductive Elements
Kosei Tanii; Koji Wada
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 24, 1, 14-16, Jan. 2014, Peer-reviwed, A dual-path resonator for a wideband bandpass filter (bandpass filter) is proposed by using a coupled-line and a transmission line with inductive elements. It realizes a dual-mode resonance by an open-circuited interdigital coupled-line and a transmission zero near the lower cutoff frequency due to the effect of the dual-path. The wideband BPF composed of two resonators and two open-circuited stubs is also presented. The presented filter shows that steepness at both the lower and upper cutoff frequencies and high attenuation level at the stopband are obtained. Measurement result with electromagnetic simulation is observed and they are good agreement. Its bandwidth is about 1.7 GHz and the fractional bandwidth is about 44% on compact size of 22 x 17 mm(2).
Scientific journal, English

平面形高域通過フィルタの設計に関する基礎検討
大島 心平; 中野 アスカ; 和田 光司
小山工業高等専門学校 研究紀要, 小山工業高等専門学校, Vol.46, 46, 127-130, Dec. 2013, Peer-reviwed
Research institution, Japanese

Millimeter-wave CMOS lowpass and highpass filters with transmission zeros based on coupled-line and transmission line
Kosei Tanii; Koji Wada; Mitsuo Makimoto; Sadao Igarashi; Kuniaki Fukui; Kouichi Kobinata
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, WILEY-BLACKWELL, 55, 11, 2808-2813, Nov. 2013, Peer-reviwed, A millimeter-wave lowpass and highpass filters are proposed by using a coupled-line and a transmission line. Because these proposed filters have transmission zeros, the conditions of them are found by using even and odd modes analysis. Then, complementary metal oxide semiconductor technology is applied to the proposed filters. (c) 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2808-2813, 2013
Scientific journal, English

Frequency diplexer using multimode bandpass filters with high stopband attenuation level
K. Tanii; K. Wada
ELECTRONICS LETTERS, INST ENGINEERING TECHNOLOGY-IET, 49, 16, 1011-1012, Aug. 2013, Peer-reviwed, Multimode bandpass filters are proposed by using a hairpin resonator and two multimode resonators. The proposed bandpass filter has five-mode resonance in a passband and transmission zeros at both the lower and higher stopbands near the cutoff frequencies. Because the steep characteristics at the edge of the passband and the high attenuation level at the stopbands can be obtained due to the multimode resonance and transmission zeros, a frequency diplexer with adjacent passbands can be comprised of the proposed bandpass filters by using an open-matching methodology.
Scientific journal, English

入出力整合補償回路を有する中心周波数可変型インターディジタル結合共振器バンドパスフィルタに関する基礎検討
關谷尚人; 和田光司; 大嶋重利
エレクトロニクス実装学会誌, エレクトロニクス実装学会, Vol.16, No.3, 211-220, May 2013, Peer-reviwed
Scientific journal, Japanese

Wideband Microstrip Line Diplexer by Bandpass Filters UsingResonators Based on Coupled Line and Transmission Line with Ground
Kosei Tanii; K.Wada
Progress in Electromagnetics Research Symposium (PIERS2012), -, -, Aug. 2012, Peer-reviwed
International conference proceedings, English

マルチバンド周波数変換によるフィルタ設計における未知定数決定の一手法
宮田尚起; 和田光司
電子情報通信学会和文論文誌（Ｃ), The Institute of Electronics, Information and Communication Engineers, Vol.J95-C, No.3, 61-67, Mar. 2012, Peer-reviwed, マルチバンド周波数変換を用いてフィルタ設計する際に必要となる周波数変換の未知定数の決定の一手法を提案する.提案した決定法を用いたフィルタの設計例を示し,その有効性を確認した.
Scientific journal, Japanese

周波数変換を用いたマルチバンドBEFの設計
宮田尚起; 和田光司
電子情報通信学会和文論文誌（Ｃ), The Institute of Electronics, Information and Communication Engineers, Vol.J95-C, No.2, 44-48, Feb. 2012, Peer-reviwed
Scientific journal, Japanese

スタブ形共振器を組み合わせた楕円関数型バンドパスフィルタにおける通過帯域近傍の阻止域特性改善に関する一検討
宮田尚起; 岡田真一; 石飛徳昌; 和田光司
エレクトロニクス実装学会誌, The Japan Institute of Electronics Packaging, vol.15, No.1, 66-81, Jan. 2012, Peer-reviwed, Various bandpass filters using stub resonators have been proposed to realize attenuation poles near the desired passband. However, designers have had to set the location of the attenuation poles by trial and error so as to use the attenuation pole effectively.
In this paper, we propose and design bandpass filters using stub resonators in order to decide the location of the attenuation poles and the sidelobe level in the stopband near the passband by using the elliptic function characteristic. The effectiveness of the designed filters is evaluated by circuit simulation, electromagnetic simulation, and experiment. We have also confirmed the realization of the sidelobe level in the stopband near the passband that is larger than the basic elliptic function characteristic by the appropriate choice of first and third resonators.
Scientific journal, Japanese

A compact multilayer triplexer using an ultra-wideband diplexer and a low-pass filter for 2.4 GHz wireless systems
Shinpei Oshima; Koji Wada; Ryuji Murata; Hiroshi Hara; Hitoshi Ebihara; Yukihiro Shimakata
IEICE ELECTRONICS EXPRESS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, 9, 12, 1075-1080, 2012, Peer-reviwed, We propose a triplexer in a low temperature co-fired ceramic substrate for ultra-wideband (UWB) and 2.4 GHz wireless systems. This triplexer can be applied to the band of 2.4 GHz wireless systems (2.4 - 2.5 GHz), the band group 1 (3.168 - 4.752 GHz) of multiband orthogonal frequency-division multiplexing UWB wireless systems, and the band groups 3 and 4 (6.336 - 9.504 GHz) of the same systems. The triplexer achieves a compact size (5.3x5.3x0.384 mm(3)). The insertion losses are less than 2.0 dB and the isolation characteristics are higher than 24 dB.
Scientific journal, English

周波数変換を用いたマルチバンドフィルタに関する一検討
宮田尚起; 和田光司
電気学会和文論文誌（Ｃ）, The Institute of Electrical Engineers of Japan, vol.131, No.11, 1950-1957, Nov. 2011, Peer-reviwed, A unified design method for multiband filters using a frequency mapping approach in the classical filter design is proposed. It has previously been reported that dual band bandpass and band elimination mapping approaches are obtained by applying the bandpass or band elimination mapping twice. In this study, we examine the variation of the filter characteristics by repeating the frequency mapping, and we have found that the frequency mapping for power-of-two bands can be obtained for the filter design. We have also confirmed that not only the mapping for the power-of-two bands but the mapping for arbitrary bands including odd number bands can be obtained. The present study has demonstrated that the filter design method by using the proposed frequency mapping is very effective for the multiband filter design.
Scientific journal, Japanese

SAWフィルタと低温同時焼成セラミック基板で構成した広帯域フィルタを用いたダイプレクサ
勝本達也; 大島心平; 村田龍司; 海老原均; 和田光司
エレクトロニクス実装学会誌, The Japan Institute of Electronics Packaging, vol. 14, No.6, 492-500, Sep. 2011, Peer-reviwed, In this paper, we discuss diplexers using a wide-band filter and a SAW filter. The wide-band filter is fabricated in an LTCC substrate. We developed the diplexers for GPS/UWB and Bluetooth/UWB applications. The diplexers are evaluated with commercial simulators and also experimentally. Our results show that the GPS pass band (the range of 1.555 to 1.600 GHz) and the UWB pass band (the range of 3.23 to 5.13 GHz) are realized. We are able to produce the GPS/UWB diplexer at a size of 4.35 mm×5.225 mm×1.06 mm. Moreover, we realize the Bluetooth pass band (the range of 2.37 to 2.54 GHz) and the UWB pass band (the range of 3.23 to 5.21 GHz). For the Bluetooth/UWB diplexer, we achieved a size of 4.35 mm×5.92 mm×1.06 mm.
Scientific journal, Japanese

A study on a multilayer diplexer using LTCC technology for ultra-wideband wireless modules
Shinpei Oshima; Koji Wada; Ryuji Murata; Yukihiro Shimakata
IEICE ELECTRONICS EXPRESS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, 8, 11, 848-853, Jun. 2011, Peer-reviwed, A multilayer diplexer in a low temperature co-fired ceramic substrate for compact ultra-wideband (UWB) wireless modules is presented. This diplexer can separate the band group 1 (3.168-4.752 GHz) of multiband orthogonal frequency-division multiplexing UWB systems from the band groups 3 and 4 (6.336-9.504 GHz) of the same systems. The basic characteristics of the diplexer are simulated with a circuit simulator and an electromagnetic simulator. The fabrication and measurement of the presented diplexer are also carried out. The measured results of the fabricated diplexer agree well with the simulated results. The insertion losses are less than 2.0 dB and the isolation characteristics are higher than 30 dB. The diplexer achieves a compact size (7.2 x 3.6 x 0.384 mm(3)).
Scientific journal, English

透明導電性酸化物に微細金属配線を配置したコプレーナ線路に関する検討
荻野 剛士; 和田 光司; 中島 邦彦; 羽田 肇; 大橋 直樹
電子情報通信学会和文論文誌（Ｃ), The Institute of Electronics, Information and Communication Engineers, Vol. J93-C, No.12, 672-673, Dec. 2010, Peer-reviwed, 透明コプレーナ線路として,透明導電性酸化物の上部に微細金属配線を配置した構造を検討した.本構造により,透明導電性酸化物のみの線路と比較して通過特性が60GHzで15dB向上することを電磁界シミュレーションで明らかにした.
Scientific journal, Japanese

有極型広帯域LTCCフィルタとSAWフィルタを用いたダイプレクサに関する基礎検討
勝本達也; 村田龍司; 大島心平; 海老原 均; 和田光司
電子情報通信学会和文論文誌(c), vol.J93-C, No.11, 533-534, Nov. 2010, Peer-reviwed
Scientific journal, Japanese

Dual-Band Microstrip-Line BPFs Using Tap-Coupling Resonators
Nobuhiko Okuzaki; Yukihiro Shimakata; Mitsuyuki Yamauchi; Kouji Wada; Takashi Iwasaki
ELECTRONICS AND COMMUNICATIONS IN JAPAN, SCRIPTA TECHNICA-JOHN WILEY & SONS, 93, 6, 25-33, Jun. 2010, Peer-reviwed, We focused on various dual-band microstrip-line bandpass filters (BPFs) based on tap-coupled resonators. Three types of BPFs, the basic type, multiple-pole type, and wideband type, were proposed and designed by classical filter theory based on the narrowband approximation method. These filters were analyzed by original computation programs and commercial circuit and electromagnetic simulators. The proposed BPFs were then fabricated and measured in the laboratory. The results confirm that the proposed BPFs produce dual passband response, multiple attenuation poles, and wide-passband characteristics. Very good agreement is found between the results of simulations and experiments. (c) 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 93(6): 25-33, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecj.10212
Scientific journal, English

集中定数素子を用いた小型バランスフィルタ
福永達也; 和田光司
電子情報通信学会和文論文誌（Ｃ), The Institute of Electronics, Information and Communication Engineers, vol.J93-C, No.6, 183-188, Jun. 2010, Peer-reviwed, 集中定数素子,集中定数素子と分布定数線路を組み合わせた小型バランスフィルタについて提案し,その回路構成法について示すとともにその伝送特性についてシミュレーション及び試作実験により検討を行った.試作検証を行った結果,通過周波数において振幅バランス特性±1dB以内,位相バランス特性180°±5°以内の良好なバランス特性が得られることを確認した.集中定数素子と分布定数線路を組み合わせることによって,Machandバランを代表するλ/2線路を必要とする従来技術に対して共振器の長さを約1/10のサイズに小型化したバランスフィルタを実現した.
Scientific journal, Japanese

タップ結合型共振器を用いた有極型マイクロストリップ線路バランスフィルタに関する検討
久保芳之; 和田光司
電気学会論文誌Ｃ, The Institute of Electrical Engineers of Japan, vol.130, No.6, 972-979, Jun. 2010, Peer-reviwed, We propose microstrip-line balanced filters with controllable attenuation poles by using tapped resonators. These filters are basically composed of a coupled-line and tapped resonators. The coupled-line provides bandpass responses with attenuation poles and balanced filter operation. Also, the tappd resonators provide bandpass responses and attenuation poles. The position and number of the attenuation pole are controlled by the choice of the kind of the tapped resonator. In this paper, we examine a filter with an unbalanced port and a balanced port as well as a filter with a balanced port and a balanced port. The presented filters are simulated with commercial simulators and are measured with a vector network analyzer. We have confirmed that the bandpass characteristics with controllable attenuation poles and balanced characteristics(amplitude and phase balance performances) are obtained. The measured results of the fabricated filters agree well with the simulated results.
Scientific journal, Japanese

A compact multilayer diplexer in LTCC substrate using LPF with multiple attenuation poles and wideband BPF
Shimpei Oshima; Kouji Wada; Ryuji Murata; Yukihiro Shimakata
Electronics and Communications in Japan, 93, 5, 24-32, May 2010, Recently, compact wideband BPFs for a UWB system have been studied actively. In this paper we propose a compact diplexer built into an LTCC substrate for a UWB system and 2.4-GHz wireless systems. First, a wideband BPF for a UWB system and an LPF with multiple attenuation poles for 2.4-GHz wireless systems are described. Second, we design matching circuits of a common port to retain the basic performance of both the BPF and the LPF. Third, in accordance with the results of the study, we design a compact diplexer built into an LTCC substrate. Finally, we verify the effectiveness of the proposed method by experiments. © 2010 Wiley Periodicals, Inc.
Scientific journal, English

Multilayer Dual-Band Bandpass Filter in Low-Temperature Co-Fired Ceramic Substrate for Ultra-Wideband Applications
Shinpei Oshima; Kouji Wada; Ryuji Murata; Yukihiro Shimakata
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 58, 3, 614-623, Mar. 2010, Peer-reviwed, In this paper, we propose a new multilayer dual-band bandpass filter in a low-temperature co-fired ceramic (LTCC) substrate for ultra-wideband (UWB) applications. This bandpass filter consists of two wideband bandpass filters and matching circuits. It is for UWB applications, which use the band group 1 (3.168-4.752 GHz) and the band groups 3 and 4 (6.336-9.504 GHz) of multiband orthogonal frequency-division multiplexing systems. The basic characteristics of the bandpass filter are simulated with a circuit simulator and an electromagnetic simulator. We also verify the effectiveness of the presented filter through experiments using LTCC technologies. The measured results of the fabricated filters agree well with the simulated results, and we obtain the good wide-passband characteristics with the desired notch band. The insertion losses are less than 2.5 dB in the wide passbands, which satisfies the target characteristics. Moreover, out-of-band attenuation performances almost satisfy the target characteristics: for instance, the attenuation level is higher than 33 dB from 0.8 to 2.17 GHz, 17 dB from 2.4 to 2.48 GHz, and 26 dB from 5.15 to 5.35 GHz. The fabricated filter has a size of 7.5 x 3.8 x 0.386 mm(3).
Scientific journal, English

Errata: Miniaturization of a Wideband Filter in an LTCC Substrate for Compact Wireless Modules [J. Jpn. Inst. Electron. Packaging 12(7): 629-635 (2009)]
Oshima Shinpei; Wada Kouji; Murata Ryuji; Shimakata Yukihiro
The Journal of Japan Institute for Interconnecting and Packaging Electronic Circuits, The Japan Institute of Electronics Packaging, 13, 1, 86-86, 2010

Errata: Miniaturization of a Wideband Filter in an LTCC Substrate for Compact Wireless Modules [J. Jpn. Inst. Electron. Packaging 12(7): 629-635 (2009)]
Oshima Shinpei; Wada Kouji; Murata Ryuji; Shimakata Yukihiro
The Journal of Japan Institute for Interconnecting and Packaging Electronic Circuits, The Japan Institute of Electronics Packaging, 13, 4, 313-313, 2010

Miniaturization of a wideband filter in an LTCC substrate for compact wireless modules
Shinpei Oshima; Kouji Wada; Ryuji Murata; Yukihiro Shimakata
Journal of Japan Institute of Electronics Packaging, 12, 7, 629-635, Nov. 2009, Peer-reviwed, In this paper, we present a method of miniaturization for a wideband filter in a low-temperature co-fired ceramic (LTCC) substrate. The presented method uses a spiral strip line consisting of multilayer structures, which realizes a very small shape compared to normal meandering structures or spiral structures. The presented structure is applied to wideband filters with the aid of Smith charts. We also verify the presented method by prototyping very small wideband filters in the LTCC substrate.
Scientific journal, Japanese

小型無線モジュール用LTCC 基板内蔵広帯域フィルタの小型化
大島心平; 和田光司; 村田龍司; 島方幸広
エレクトロニクス実装学会誌, vol. 12, No.7,, 629-635, Nov. 2009, Peer-reviwed
Scientific journal, Japanese

折り曲げ構造を有する両端開放型共振器を用いた有極型積層BPFに関する基礎検討
笠舞真史; 牛江正彦; 和田光司
電気学会論文誌(C), The Institute of Electrical Engineers of Japan, Vol.129, No.3, 562-563, Mar. 2009, Peer-reviwed, We propose a multilayer bandpass filter(BPF) with attenuation poles using folded resonators with open-circuited end. Firstly, the basic characteristics of a folded resonator with open-circuited end under the change of the parameters is examined by an electromagnetic simulator. Secondly, 3-pole multilayer BPFs using the resonators above are proposed, simulated and experimented. As a result, the bandpass characteristics with attenuation poles near the lower and higher side of the center frequency is realized by the proposed structure.
Scientific journal, Japanese

結合線路BPFとλ/4共振器結合型開放端スタブを用いた有極型広帯域マイクロストリップ線路BPFに関する解析的検討
清水康隆; 村田龍司; 大島心平; 島方幸広; 和田光司
電子情報通信学会和文論文誌（Ｃ）, The Institute of Electronics, Information and Communication Engineers, vol. J91-C, No. 12, 780-781, Dec. 2008, Peer-reviwed, 本論文では,結合線路帯域フィルタ(BPF)とλ/4共振器を結合させた開放端スタブを用いた有極型広帯域BPFを提案し,汎用電磁界シミュレータを用いた解析検討を行った.結果より,提案したBPFは広帯域特性を実現するとともに,同様の構造を用いてパラメータを変化させることで異なる通過帯域を実現し,それぞれにおいて減衰極により良好なスカート特性が得られることをシミュレーション結果より確認した.
Scientific journal, Japanese

減衰極の制御機能付き結合線路と分布定数タップ結合型共振器を併用した有極形広帯域マイクロストリップ線路BPFに関する検討
清水康隆; 島方幸広; 村田龍司; 大島心平; 和田光司; 岩崎俊
電子情報通信学会和文論文誌（Ｃ）, The Institute of Electronics, Information and Communication Engineers, vol. J91-C, No. 9,, 470-474, Sep. 2008, Peer-reviwed, 本論文では,分布定数タップ結合型共振器及び結合線路に線路を装荷した減衰後の制御機能付き結合線路を用いた有極形広帯域帯域フィルタ(BPF)を提案し,汎用電磁界シミユレータを用いてその伝送特性について解析的検討を行った.結果より,提案したBPFは広帯域特性を実現するとともに,通過帯域近傍の低域側及び高域側に減衰極を実現し,良好なスカート特性が得られることを解析的に確認した.また,減衰後の制御機能付き結合線路を用いた通過帯域の制御により,帯域幅の制御が可能であることを確認した.
Scientific journal, Japanese

キャパシタとλ/2 先端開放型スタブで構成される有極形共振器を用いたLTCC 基板内蔵小型広帯域BPFに関する一検討
大島心平; 和田光司; 村田龍司; 島方幸広
電子情報通信学会和文論文誌（Ｃ）, The Institute of Electronics, Information and Communication Engineers, vol. J91-C, No. 8, pp. 409-417, Aug. 2008, Peer-reviwed, 本論文では,LTCC(Low Temperature Co-fired Ceramics)基板に内蔵可能な小型形状の広帯域帯域通過フィルタ(BPF)を実現する一手法について述べる.まず,キャパシタとλ/2先端開放型スタブにより広帯域化を実現した有権形共振器の構成法を提案する.次に,提案回路の共振特性とそのメカニズムを理論と等価回路による考察から明らかにするとともに,提案回路を用いて,LTCC基板に内蔵可能な小型形状の有極形広帯域BPFを実現し,本手法の有効性を確認する.
Scientific journal, Japanese

タップ結合型共振器を用いたマイクロストリップ線路デュアルバンドBPF
奥崎伸彦; 島方幸広; 山内拡幸; 和田光司; 岩崎俊
電気学会和文論文誌（Ｃ）, The Institute of Electrical Engineers of Japan, vol.128, No.6, 878-884, Jun. 2008, Peer-reviwed, We focus on various dual-band microstrip-line bandpass filters(BPFs) based on tap-coupled resonators. In this study, three types of the BPFs such as basic type, multiple poles based type and wide-band type are proposed and designed by classical filter theory based on narrow-band approximation method. These filters are analyzed by original computation programs and commercial circuit and electromagnetic simulators. And then, the proposed BPFs are fabricated and measured in our laboratory. From the results, we have confirmed that the proposed BPFs produce dual pass-band response, multiple attenuation poles and wide-passband characteristics. We also have observed very good agreements between the simulations and experiments.
Scientific journal, Japanese

有極形LPF及び広帯域BPFを用いたLTCC基板内蔵小型ダイプレクサ
大島心平; 和田光司; 村田龍司; 島方幸広
電気学会和文論文誌（Ｃ）, vol.128, No.6, 853-860, Jun. 2008, Peer-reviwed
Scientific journal, Japanese

各種分布定数タップ結合型マイクロストリップ線路共振器を用いた有極形広帯域バンドパスフィルタに関する検討
谷井宏成; 清水康隆; 和田光司; 西村太; 笹部孝司; 植野嘉章; 岩崎俊
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, vol. J91-C, No. 6, 332-340, Jun. 2008, Peer-reviwed, 筆者らは先に,分布定数タップ結合を適用した両端開放型,両端接地型及び一端接地型のマイクロストリップ線路(MSL)共振器を提案し,その共振器の広帯域特性及び減衰極の実現位置について検討を行ってきた.本論文では,それぞれの共振器の回路パラメータを変化させた場合の特性変化について回路シミュレータ及び電磁界シミュレータにより比較検討を行った.また得られた特性をもとに5種類の帯域フィルタ(BPF)を構成しその伝送特性について,回路シミュレータ,電磁界シミュレータによる計算及び,試作実験による検討を行った.
Scientific journal, Japanese

インタディジタル結合を有する積層共振器を用いた小型広帯域バランスフィルタ
福永達也; 和田光司
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, vol. J91-C, No. 5, 297-303, May 2008, Peer-reviwed, 帯域通過フィルタ(BPF)と,バランの機能を統合し,小型で良好なバランス信号を広帯域にわたって得られる積層バランスフィルタを提案し,良好なバランス信号が得られることを汎用電磁界シミュレータによる解析結果及び,低温同時焼成セラミック(LTCC)技術を用いたフィルタの試作実験を通して検証をした.不平衡-平衡型バランスフィルタについては,通過帯域内で振幅バランス特性0.5[dB]以内,位相バランス180°±3°以内の良好な平衡信号が広帯域に得られることを確認し,また平衡-平衡型バランスフィルタでは,通過帯域内でコモンモード信号を約30dB減衰する特性が得られることを確認した.
Scientific journal, Japanese

不平衡線路の上下に平衡線路を配置した小型積層広帯域バランに関する基礎検討
元山洋人; 木村広伸; 水谷靖彦; 平井隆己; 村田正樹; 和田光司
電子情報通信学会和文論文誌（Ｃ), The Institute of Electronics, Information and Communication Engineers, vol. J91-C, No. 5, 313-314, May 2008, Peer-reviwed, 積層型マーシャントバランを小型化すると,線路の特性インピーダンスが低くなる傾向にあり,結果として結合線路の偶モードインピーダンスが下がり,通過帯域の広帯域化を実現することが困難である.本論文で提案するバランはマーシャントバランの平衡線路を不平衡線路の上下に配置することを特徴とし,この構造によって線路間の結合が密結合となり,小型で広帯域通過特性を実現できることを解析的に確認した.
Scientific journal, Japanese

分布定数タップ結合型共振器を用いた小型広帯域マイクロストリップ線路BPFに関する検討
谷井宏成; 西村太; 笹部孝司; 植野嘉章; 和田光司; 岩崎俊
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, vol. J91-C, No. 4, 251-256, Apr. 2008, Peer-reviwed, 本論文では,従来から検討されてきた分布定数タップ結合型共振器と先端短絡スタブの組合せにより広帯域用共振器を構成し,その共振特性について検討した.また,その共振器と擬似LC並列回路の組み合わせた小型マイクロストリップ線路共振器帯域通過フィルタ(BPF)の伝送特性について,電磁界シミュレータによる計算結果及び実験結果との比較検討を行い,従来の分布定数タップ結合型共振器BPFより小型で所望の特性が得られることを解析及び実験的に確認した.
Scientific journal, Japanese

ヘアピン構造を有する誘電体棒装荷型MSL共振器LPFに関する解析的検討
中島惇; 和田光司; 橋本修; 高橋毅
電気学会論文誌（c), The Institute of Electrical Engineers of Japan, Vol.128-C, NO.4, 683-684, Apr. 2008, Peer-reviwed, This paper focuses on realizability of a reduced-size LPF using a substrate loaded width high relative dielectric constant rods by LTCC technologies. We have examined two sections form hairpin type LPF and one section form hairpin. As a result, in comparison with the characteristic of one section, we could confirm that good out-of-band characteristic was provided with the realization of a steep skirt characteristic.
Scientific journal, Japanese

LC装荷タップ結合型共振器BPFの設計に関する一検討
安住壮紀; 和田光司; 中島奈緒子; 橋本修
電気学会和文論文誌（Ｃ）, The Institute of Electrical Engineers of Japan, Vol.128-C, No 3, 513-514, Mar. 2008, Peer-reviwed, The resonance characteristics of short-ended half-wavelength coplanar waveguide(CPW) LC tap-coupling resonators are examined theoretically and experimentally. The characteristics near the passband have been improved by applying the presented CPW resonator to a design of a bandpass filter(BPF). Moreover, the difference between the calculation and the measurement results is examined by using the equivalent circuit about the presented BPF.
Scientific journal, Japanese

A compact multilayer diplexer in LTCC substrate using LPF with multiple attenuation poles and wideband BPF
Shinpei Oshima; Kouji Wada; Ryuji Murata; Yukihiro Shimakata
IEEJ Transactions on Electronics, Information and Systems, Institute of Electrical Engineers of Japan, 128, 6, 3-860, 2008, Peer-reviwed, Recently, compact wideband BPFs for UWB system are studied actively. In this paper we propose a compact diplexer in LTCC substrate for UWB system and 2.4GHz wireless systems. Firstly, a wideband BPF for UWB system and an LPF with multiple attenuation poles for 2.4GHz wireless systems are described. Secondly, we design matching circuits of a common port to keep basic performance of both the BPF and the LPF. Thirdly, in accordance with the result of the study, we design a compact diplexer in LTCC substrate. Finally, we verify the effectiveness of proposed method by experiments.
Scientific journal, English

可変容量ダイオードのインダクタンス特性を用いたタップ結合型チューナブルλ/4共振器BPFの実験的検討
大野貴信; 小俣皓司; 和田光司; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, J90-C, No.10, 653-661, Oct. 2007, Peer-reviwed, 本論文では,インダクタンスの変化を用いたチューナブル共振器フィルタに着目し,中心周波数及びタップ結合法の適用によって実現される減衰極の変化について検討を行った.まず,タップ結合型λ/4共振器の開放端に装荷するインダクタとしてワイヤを適用し,そのインダクタンスを変化させた場合における特性の変化をコプレーナ線路(CPW)において実験的に確認した.次に,可変容量ダイオードの自己共振周波数(SRF)以降に出現する可変インダクタンス特性を確認し,それを共振器及びフィルタに応用することで中心周波数の変化量が30%を超える可変範囲の大きなチューナブル特性を実現した.
Scientific journal, Japanese

A dual-band comb-line filter using a half-wavelength stripline nesting a quarter-wavelength coplanar waveguide resonator
Shoichi Kitazawata; Masahiro Geshiro; Kenta Ishimaru; Masaharu Ohashi; Hideaki Fujimoto; Kouji Wada
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E90B, 9, 2439-2446, Sep. 2007, Peer-reviwed, This paper presents a novel dual-band comb-line filter using a pair of hybrid resonators. The resonator consists of a half-wavelength stripline resonator short-circuited at both ends and a quarter-wavelength resonator of coplanar waveguide that is nested in the half-wavelength resonator. Numerical calculations by an electromagnetic simulator clarify the characteristics of dual-frequency resonance of the hybrid resonator when the structural parameters are changed. The surface current density on the resonator is also investigated at the resonant frequencies. A typical model of the resonator is fabricated and its resonance frequency characteristics are measured.
Scientific journal, English

整合補償回路付きマイクロストリップ線路バランによる広帯域化に関する解析的検討
村田正樹; 元山洋人; 木村広伸; 水谷靖彦; 平井隆己; 和田光司; 岩崎俊
電子情報通信学会和文論文誌（Ｃ）, The Institute of Electronics, Information and Communication Engineers, Vol.J90-C, No.9, 644-645, Sep. 2007, Peer-reviwed, 本論文では,マイクロストリップ結合線路を用いたマーチャントバランの平衡ポートに対しコンデンサと伝送線路を用いた整合補償回路を接続した広帯域バランを提案し,電磁界シミュレータを用いてその伝送特性の検討を行った.結果より,従来型のマーチャントバランより比帯域幅において約12%の増加を解析的に確認した.
Scientific journal, Japanese

準ミリ波帯用有極形マイクロストリップ線路共振器BPFに関する基礎検討
谷井宏成; 和田光司; 岩崎俊
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J90-C, No.8, 608-609, Aug. 2007, Peer-reviwed, 本論文では,マイクロストリップ線路共振器を用いた準ミリ波帯用有極形広帯域帯域フィルタ(BPF)を提案し,回路シミュレータ及び電磁界シミュレータを用いて解析し,その伝送特性について検討を行った.結果より,22〜29GHzの帯域近傍の低域側と高域側に減衰極が配置可能な帯域通過特性の実現を解析的に確認した.
Scientific journal, Japanese

分布定数タップ結合型共振器と短絡スタブを併用した共振器による広帯域BPFの小型化
谷井宏成; 和田光司; 西村太; 笹部孝司; 植野嘉章; 岩崎俊
電子情報通信学会和文論文誌 C, The Institute of Electronics, Information and Communication Engineers, Vol.J90-C, No.6, 512-513, Jun. 2007, Peer-reviwed, 本論文では,マイクロストリップ線路(MSL)を用いた両端開放型の分布定数タップ結合型共振器と短絡スタブを併用した共振器と,擬似LC回路を組み合わせた3段小型広帯域帯域フィルタ(BPF)を提案する.提案のBPFの伝送特性について回路及び電磁界シミュレータにより検討した結果,帯域外改善特性を改善しつつ,従来形に比べて約26%まで小型化できることを確認した.
Scientific journal, Japanese

両端接地型半波長ストリップ線路共振器と1/4波長コプレーナ線路共振器を用いた2周波共振器の共振特性
北沢祥一; 下代雅啓; 大橋正治; 藤本英昭; 和田光司
電子情報通信学会和文論文誌 C, The Institute of Electronics, Information and Communication Engineers, Vol.J90-C, No.5, 447-451, May 2007, Peer-reviwed, 本論文では,両端接地型半波長ストリップ線路共振器とコプレーナ線路からなる1/4波長共振器で構成された2周波共振器構造を新しく提案する.そして,汎用電磁界シミュレータを用いた数値解析によって,構造パラメータに対する共振特性の依存性を解析し,本共振器における2周波共振特性の詳細を明らかにする.
Scientific journal, Japanese

積層方向にインタディジタル結合させた共振器により構成した小型積層バランスフィルタに関する基礎検討
福永達也; 和田光司
電子情報通信学会論文誌 C, The Institute of Electronics, Information and Communication Engineers, Vol.J90-C, No.4, 400-403, Apr. 2007, Peer-reviwed, 本論文では,積層方向にインタディジタル結合させた共振器を用いた,帯域フィルタ(BPF)にバラン機能を統合し,良好なバランス信号が実現可能なフィルタ構成を提案した.提案の構成は約0.11波長(中心周波数f_c=7.7GHz)に相当する長さの共振器で構成したBPFであり,特性として良好なバランス信号(振幅バランス0.5dB以内,位相バランス180±2゜以内)が得られることを汎用電磁界シミュレータを用いて確認した.
Scientific journal, Japanese

タップ結合型共振器BPFを用いた有極型クワッドプレクサに関する基礎検討
大野貴信; 和田光司; 橋本修
電子情報通信学会論文誌 C, The Institute of Electronics, Information and Communication Engineers, Vol.J90-C, No.4, 390-391, Apr. 2007, Peer-reviwed, 本論文では,タップ結合法を適用したλ/4共振器とλ/2共振器を組み合わせて帯域通過フィルタ(BPF)を構成し,減衰極の制御機能を活用した4帯域通過特性を有するクワッドプレクサの提案及び設計を行った.計算結果より,減衰極が帯域外特性の改善及びアイソレーション特性の向上に有効であることを確認し,比較的部品数が少ない構成で多極特性を有するクワッドプレクサの設計が可能であることを確認した.
Scientific journal, Japanese

インタディジタル結合誘電体同軸共振器を用いた小型バランスフィルタ
福永達也; 和田光司
電子情報通信学会論文誌 C, The Institute of Electronics, Information and Communication Engineers, Vol.J90-C, No.2, 174-175, Feb. 2007, Peer-reviwed, 帯域フィルタ(BPF)とバランの機能を統合し,小型で良好なバランス信号が得られる誘電体バランスフィルタを提案した.本論文では,λ/4波長の約40%に相当する長さの誘電体同軸共振器で構成したBPFで,良好なバランス信号が得られることを汎用電磁界シミュレータを用いて検証した.
Scientific journal, Japanese

A Hybrid Resonator Consisting of a Half-Wavelength Stripline Nesting a Quarter-wavelength Coplanar Waveguide Resonator and its Application to a Dual-band Comb-Line Filter
S. Kitazawa; M.Geshiro; K.Ishimaru; M.Ohashi; H.Fujimoto; K.Wada
Proc. of 2006 International Symposium on Anttenas and Propagation, Total 6pages, Dec. 2006, Peer-reviwed
International conference proceedings, English

分布定数タップ結合型MSL共振器を用いた有極形広帯域BPFに関する基礎検討
和田光司; 谷井宏成; 西村太; 笹部孝司; 植野嘉章; 岩崎俊
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, vol. J89-C, No.10, 672-677, Oct. 2006, Peer-reviwed, 分布定数タップ結合を適用した両端開放型マイクロストリップ線路(MSL)共振器と両端接地型MSL共振器の共振特性について汎用回路シミュレータ及び電磁界シミュレータを用いて検討した.更にそれらの共振器を組み合わせた4段帯域通過フィルタ(BPF)の伝送特性について同様に検討することで,広帯域通過特性を実現するとともに減衰極の実現個数とその配置位置についても共振器の基本性能がフィルタ特性において反映されていることを確認した.
Scientific journal, Japanese

Fundamental characteristics of microstrip resonators loaded with dielectric rods for suppression of spurious responses
R. K. Pokharel; K. Wada; O. Hashimoto; T. Takahashi
IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION, INSTITUTION ENGINEERING TECHNOLOGY-IET, 153, 4, 341-346, Aug. 2006, Peer-reviwed, Characteristics of a class of microstrip resonators which are loaded with dielectric rods, are investigated by a finite-difference time-domain (FDTD) method. Dielectric rods to be inserted between a strip conductor and the ground plane have higher relative permittivity than that of the substrate. When a basic half-wavelength (lambda/2) microstrip resonator is loaded with two dielectric rods, the electric length of a loaded half-wavelength (lambda/2) resonator becomes longer than lambda/2, which makes its fundamental resonant frequency (f(r)(l)) to be generated on the region lower than that of an unloaded lambda/2 resonator (f(r)) and its first spurious response f(sp1) is generated on the region higher than 2f(r)(l). Therefore, to shift f(r)(l) back to f(r), the resonator's length is to be reduced, and this, in turns, suppresses the spurious responses. A tapped resonator employing the proposed method is capable of realising the improved spurious responses together with an attenuation pole in the stopband, and of reducing the resonator's length as well. A resonator employing the presented method is fabricated using low-temperature cofired ceramic (LTCC) materials, and the analysis is verified by comparing the computed results with the measurement.
Scientific journal, English

タップ結合法を用いたマイクロ波共振器フィルタによる帯域外特性改善
和田光司; 橋本修
電子情報通信学会和文論文誌(C), The Institute of Electronics, Information and Communication Engineers, vol. J89-C, No. 6, 372-384, Jun. 2006, Peer-reviwed, 本論文では,マイクロ波共振器フィルタにおける帯域外特性改善に着目し,タップ結合法の適用により実現される減衰極を積極的に利用した特性改善について述べる.ここでは,最初に分布定数線路共振器の基本構成である両端開放型λ/2共振器,両端接地型λ/2共振器及び一端接地型λ/4共振器にタップ結合法を適用した場合のそれぞれの共振特性について述べる.次に,それら共振器を用いた帯域通過フィルタ(BPF)への適用例及びBPFのデュプレクサやトリプレクサへの応用例について述べることで,タップ結合法がマイクロ波共振器フィルタの帯域外特性改善に有効であることを示す.
Scientific journal, Japanese

準集中定数素子型マイクロストリップ線路共振器を用いた広帯域ＢＰＦに関する実験的検討
大野貴信; 大野祐二; 和田光司; 橋本修
電子情報通信学会和文論文誌Ｃ, The Institute of Electronics, Information and Communication Engineers, vol.J89-C, 5, 359-361, May 2006, Peer-reviwed, マイクロストリップ線路構造の高インピーダンス線路型インダクタ及びギャップキャパシタを用いて準集中定数素子型共振器を構成し,汎用電磁界シミュレータを用いて共振特性を計算した.その結果,帯域阻止特性の実現とともに広帯域通過特性の実現を確認した.更に,その特性を活用して2段準集中定数素子型帯域通過フィルタ(BPF)を構成した.解析及び測定結果より,帯域阻止特性の位置を適切に設定することによって所望の広帯域特性が得られることを確認した.
Scientific journal, Japanese

各種タップ結合共振器ＢＰＦを用いた多極形トリプレクサの一設計法
和田光司; 松田直紀; 西堀満洋; 岩崎俊; 橋本修
電子情報通信学会和文論文誌Ｃ, The Institute of Electronics, Information and Communication Engineers, J89-C, 5, 282-291, May 2006, Peer-reviwed, 本論文では,多極形分波回路の実現を想定し,一例としてトリプレクサに着目しその通過帯域間幅制御,帯域外特性改善及び高アイソレーション特性実現のために各種タップ結合共振器BPFを用いた回路構成を提案し,設計手法等の理論検討を行った.また,構成においては,仕様の周波数帯(中心周波数,各通過帯域間隔)によって分岐回路部の選択を行っている.
Research institution, Japanese

A Design of a Quadplexer Consisting of BPFs Using Different Tapped Resonators
T. Ohno; K. Wada; O. Hashimoto
Progress in Electromagnetics Research Symposium 2006, 79, Mar. 2006, Peer-reviwed
International conference proceedings, English

Bandstop characteristics of LTCC MSL with periodic dielectric rods loaded inside dielectric substrate
K Wada; KO Moto; O Hashimoto; T Takahashi
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS, SCRIPTA TECHNICA-JOHN WILEY & SONS, 89, 4, 1-8, 2006, Peer-reviwed, In this paper, the transmission characteristics of a microstrip line (MSL) with dielectric rods placed periodically inside the Substrate are analyzed by the finite-difference time-domain (FDTD) method. As a result, an MSL with a backstop characteristic is realized. The variation of the center frequency, the maximum cutoff level, and the stopband width are quantitatively determined in terms of the size of the lattice of the dielectric rods, the lattice period, and the number of lattice elements. Further, an MSL made of low-temperature cofired ceramic (LTCC) is fabricated and its transmission characteristics are measured. It is confirmed that a desired bandstop characteristic is obtained. (c) 2006 Wiley Periodicals, Inc.
Scientific journal, English

A class of UWB microstrip bandpass filter using quasi-lumped element resonators with controllable stopbands
Takanobu Ohno; Yuji Ohno; Kouji Wada; Osamu Hashimoto
Asia-Pacific Microwave Conference Proceedings, APMC, 2, 1253-1256, 2006, Peer-reviwed, This paper presents an ultrawideband (UWB) resonator and a bandpass niter (BPF) consisting of quasilumped elements using a microstrip line (MSL). First of all, a resonator using a high-impedance inductive line and a gap capacitor is examined by an electromagnetic simulator. The simulated results of the resonator show UWB bandpass characteristics with two controllable stopbands by adjusting the element values and the length of the resonator. Secondly, an UWB-BPF using the presented resonator is proposed, fabricated, simulated and measured. It is confirmed that desired UWB bandpass characteristics are realized by controlling two stopband characteristics. Copyright 2006 IEICE.
International conference proceedings, English

A tunable bandpass filter using tapped λ/4 resonators loaded with inductive variable capacitor
Takanobu Ohno; Kouji Omata; Kouji Wada; Osamu Hashimoto
Asia-Pacific Microwave Conference Proceedings, APMC, 2, 1280-1283, 2006, Peer-reviwed, This paper presents a tunable coplanar waveguide (CPW) bandpass filter (BPF) consisting of tapped A/4 resonators with a variable capacitor which operates like an inductive element. Firstly, a tapped λ/4 resonator loaded with an inductor is examined experimentally. Secondly, basic characteristics of the whole element of a lead wire, a chip capacitor, a variable capacitor and a resistor is examined experimentally. After that, tapped CPW resonator loaded with the element above is measured and applied to a BPF. The result of the BPF shows that the center frequency can be shifted about 31%. Copyright 2006 IEICE.
International conference proceedings, English

A compact multilayered balanced filter using resonators based on interdigitally-coupled lines
Tatsuya Fukunaga; Kouji Wada
Asia-Pacific Microwave Conference Proceedings, APMC, Institute of Electrical and Electronics Engineers Inc., 3, 1443-1446, 2006, Peer-reviwed, This paper presents a new laminated bandpass fllters(BPFs) using resonators based on interdigitally-coupled lines. In the proposed configuration, function of a balun is integrated into the filter itself. The transmission characteristics, phase balance and amplitude balance characteristics of the filters are examined by electromagnetic (EM) simulation and experiment. Copyright 2006 IEICE.
International conference proceedings, English

Effectiviness of electromagnetic wave absorbers to improve 5.8GHz DSRC EM environment inside tunnel
Ramesh K. Pokharel; Hirotomo Ichinose; Osamu Hashimoto; Makoto Toyota; Itoji Sameda; Kouji Wada
IEEE International Symposium on Electromagnetic Compatibility, 1, 147-151, 01 Dec. 2005, Electromagnetic (EM) wave absorbers have been used to improve the EM environment of an electronic toll collection (ETC) system on an express highway or a wireless local area network (LAN) system in an indoor environment. In this paper, an efficient multi-ray propagation model, which uses a combination of image technique and grid approach to trace multiple signal rays from transmitter to receiver, is employed to analyze the EM environment of a dedicated short-range communication (DSRC) system inside tunnel. The validity of the model employed is discussed by the comparison with the results obtained by an experiment inside tunnel. ©2005 IEEE.

Analytical study on change of temperature and absorption characteristics of a single-layer radiowave absorber under erradiation electric power
R Suga; O Hashimoto; RK Pokharel; K Wada; S Watanabe
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 47, 4, 866-871, Nov. 2005, Peer-reviwed, Radiowave absorbers are frequently used in high power applications, such as radar sites, and the rise of temperature of the absorber has often become a matter of concern. In this paper, the finite-difference time-domain (FDTD) method combined with the heat transport equation (HTE), also known as the FDTD-HTE method, which has been widely used in the analysis of microwave heating or temperature increase in the human head due to portable phones, is used in the analysis of the wave absorption characteristics of a single-layer wave absorber. The complex permittivity of a sample made of epoxy resin, measured by a cavity-resonator method when the sample is irradiated by a high power field for different irradiation times, is used in the analysis, and the wave absorption characteristics of the absorber under investigation highly depend on the input power and irradiation time of the high power field.
Scientific journal, English

Out-of-band improvement by BPFS with multiple attenuation poles using a condition of variable coupling length of a parallel partially coupled-line section
RK Pokharel; K Wada; T Ohno; O Hashimoto
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 47, 1, 4-9, Oct. 2005, Peer-reviwed, A combination of two microstrip-line resonators, which are partially coupled, are considered in a parallel partially coupled-line banapass filter (BPF), where one resonator is one half-wavelength (lambda/2) long, and the other (whose one end is grounded) is only one quarter-wavelength (lambda/4) long. Therefore, the length of a coupled-line section can be varied based on the position of the grounded end. Five conditions of the movable coupling length are simulated, which greatly influences the spurious responses of the BPF. This property is numerically investigated in this paper. The analysis shows that, based on the grounding position, this method is capable of realizing improved out-of band characteristics by locating the multiple attenuation poles in the stopband and improved spurious responses up to five times of the passband frequency (5f(0)) of a parallel partially coupled-line BPF. An empirical model of the BPF is fabricated, and the numerical results are verified via comparison with the experiment. (c) 2005 Wiley Periodicals, Inc.
Scientific journal, English

誘電体基板内部に棒状誘電体を周期的に配置したLTCCマイクロストリップ線路の帯域阻止特性
和田光司; 沖本浩二; 橋本修; 高橋毅
電子情報通信学会和文論文誌C, Vol.J88-C, No.7, 528-534, Jul. 2005, Peer-reviwed
Scientific journal, English

Out-of-band improvement by microstrip line BPFs with multiple attenuation poles in stopband using various conditions of coupling length of partially coupled-line section
K Wada; RK Pokharel; T Ohno; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E88C, 7, 1430-1439, Jul. 2005, Peer-reviwed, In a partially coupled-line bandpass filter (BPF), a combination of two microstrip line resonators which are partially coupled, are considered, where one resonator is half-wavelength (lambda/2)-long, and another whose one end is grounded, is only quarter-wavelength (lambda/4)-long. Therefore, the length of a coupled-line section can be varied based on the position of the grounding end, and five conditions of the movable coupling length have been simulated which will greatly influence the spurious responses of a BPR This property is numerically investigated in this paper. The analysis shows that, based on the grounding position, this method is capable of realizing the improved out-of-band characteristics by locating the multiple attenuation poles in the stopband and improved spurious responses up to five times of the center frequency (5f(0)). A few empirical models of BPF are fabricated, and the numerical results are,ensured by comparing with the experimental results.
Scientific journal, English

Experimental Study on LTCC MSL Resonators Loaded with Dielectric Rods for Improvement of Spurious Responses
R. K. Pokharel; O. Hashimoto; K. Wada; T. Takahashi
2005 IEEE AP-S International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, Session 57-9, Jul. 2005, Peer-reviwed
International conference proceedings

Realization and location control of attenuation poles by bandpass filters using mixed resonators
K Wada; T Ohno; O Hashimoto
ELECTRICAL ENGINEERING IN JAPAN, SCRIPTA TECHNICA-JOHN WILEY & SONS, 151, 4, 36-46, Jun. 2005, Peer-reviwed, This paper describes the improvement of the skirt characteristics of a bandpass filter (BPF) by using mixed tapped resonators. In this paper, we try to examine the transmission characteristics of the BPFs with a function to control the number of attenuation poles based on the use of a lambda/2 resonator and a lambda/4 resonator as the basis of the distributed constant line resonators. As a result, we have confirmed that realization of the attenuation poles has a greater effect than choice of the number of resonators or choice and location control of the numbers of realized poles. The miniaturization of the presented BPF is also accomplished as well as location of the attenuation poles mentioned above. It has been confirmed that our proposal enables the control of the number of attenuation poles of the BPF. (c) 2005 Wiley Periodicals, Inc.
Scientific journal, English

Design methodologies of planar duplexers and triplexers by manipulating attenuation poles
T Ohno; K Wada; O Hashimoto
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 53, 6, 2088-2095, Jun. 2005, Peer-reviwed, Design methodologies of planar duplexer and triplexer consisting of bandpass, filters (BPFs) using different tapped resonators are described. Firstly, we propose a planar duplexer consisting of BPFs using a tapped half-wavelength resonator and a tapped quarter-wavelength resonator. The duplexer is designed based on a classical filter design method with a narrow-band approximation and a tap-coupling method. The experimental duplexer is fabricated using coplanar-waveguide structures. Secondly, a planar triplexer consisting of three types of BPFs is described in a similar manner. The results of this study show that the design methodology is useful for realizing the high-performance planar duplexer and triplexer fabricated without increasing the number of elements.
Scientific journal, English

Characteristics of tunable half-wavelength resonators with attenuation poles
S Watanabe; K Wada; R Suga; O Hashimoto
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 45, 1, 8-15, Apr. 2005, Peer-reviwed, This paper focuses on the characteristics of tunable half-wavelength resonators. We examine four types of tunable half-wavelength resonators: an end-coupling type and three types of tap-coupling resonators. Their calculated and measured results are compared. The results show that the expected tunable characteristics of the attenuation poles and the center frequency are obtained. 2005 Wiley Periodicals, Inc.
Scientific journal, English

Improvement of spurious responses of coupled-line BPFs using interdigital-type resonators
Ramesh K. Pokharel; Kouji Wada; Takanobu Ohno; Yoshihiro Aoki; Osamu Hashimoto
Microwave and Optical Technology Letters, 44, 126-130, 20 Jan. 2005, This paper presents a method to suppress or eliminate the spurious responses of a BPF using interdigital-type resonators. The configurations presented employ interdigital-type resonators with one end grounded in order to realize improved BPF characteristics. The analysis shows that the configurations quite effectively suppress spurious responses up to five times the center frequency (5f0) and locate the attenuation poles in the stopband such that improved out-of-band characteristics can be realized. © 2004 Wiley Periodicals, Inc.

Design methodology of BPF using LC tap-coupling lambda/4 resonators and location control of attenuation poles
T Kamiyama; K Wada; O Hashimoto
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS, SCRIPTA TECHNICA-JOHN WILEY & SONS, 88, 11, 21-27, 2005, Peer-reviwed, In this paper we focused on the resonance characteristic of the LC tap-coupling lambda/4 resonator, which can locate the attenuation poles oil both sides near the fundamental resonance frecuency (f(r)), and examined the design of the bandpass filter (BPF) using this resonator and the location control of the attenuation poles. Front this result, although the number of elements increased somewhat over a conventional loaded-element tap-coupling resonator BPF, we theoretically showed that independent control of the placement locations of the attenuation poles appearing near the passband was possible, and the added value was large. (c) 2005 Wiley Periodicals, Inc.
Scientific journal, English

Realization of attenuation poles, spurious resonance suppression and size reduction by microstrip SIR loaded with dielectric rods
Ramesh K. Pokharel; Kouji Wada; Osamu Hashemoto; Takeshi Takahashi
IEICE Transactions on Electronics, E88-C, 2302-2308, 01 Jan. 2005, Characteristics of a class of stepped-impedance resonators (SIRs) which is loaded with two dielectric rods, are investigated by a Finite-Difference Time-Domain (FDTD) method. Dielectric rods to be inserted between a strip conductor and the ground plane have higher relative permittivity than that of the substrate. When a tapped half-wavelength (λ/2) microstrip resonator is loaded with two dielectric rods, the electric length of a loaded λ/2 resonator becomes longer than λ/2, which makes its fundamental resonant frequency (fr′) to be generated on the region lower than that of an unloaded λ/2 resonator (fr) and its first spurious response (fsp1) is generated on the region higher than 2f r′. Therefore, to shift fr′ back to f r, the resonator's length is to be reduced, and this, in turns, suppress the spurious responses. Then, the resonant characteristics of an SIR employing the proposed method has also been investigated, and it is found that this is capable of suppressing the spurious responses in wideband together with an attenuation pole in the stopband, and of further reducing the resonator's length. Therefore, wide exploitation of the presented method can be expected in the filter design based on the LTCC technique. Copyright © 2005 The Institute of Electronics, Information and Communication Engineers.

Bandpass filters using tunable half-wavelength resonators with transmission zeros
K Wada; S Watanabe; R Suga; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E88C, 1, 68-76, Jan. 2005, Peer-reviwed, This paper focuses on the characteristics of tunable half-wavelength resonators and their applications to bandpass filters (BPFs). First, the resonance characteristics of various tunable half-wavelength resonators are examined for the tunabilities of transmission zeros and the center frequency of the proposed BPFs. We examine four types of tunable half-wavelength resonators, namely, an end-coupling resonator and three types of tap-coupling resonators. Secondly, the proposition and design of two types of BPFs using acquired resonators are carried out. The fabrication and experimental application of the resonators and designed BPFs are also performed based on coplanar waveguide (CPW) technologies. Their calculated and measured results are compared with each other. The results show that tunabilities of the transmission zero and the center frequency of the proposed BPF are obtained as expected.
Scientific journal, English

LC装荷タップ結合型λ/4共振器を用いた有極型BPFと減衰極の位置制御
神山智英; 和田光司; 橋本 修
電子情報通信学会論文誌(C),, The Institute of Electronics, Information and Communication Engineers, Vol.J87-C, No.12, 1053-1059, Dec. 2004, Peer-reviwed, 本論文では,基本共振周波数(f_γ)近傍の両側に減衰極が配置可能であるLC装荷タップ結合λ/4共器の共振特性に着目し,その共振器を用いた帯域通過フィルタ(BPF)の設計及び減食極の位置制御について検討を行った.結果より,従来の素子装荷タップ結合型共振器BPFより素子数は若干増えるものの,通過帯域近傍に実現される減衰極の配置位置の独立制御が可能となりその付加価値は大きいことを理論的に示した.
Scientific journal, Japanese

タップ結合型λ/4共振器BPFによるチューナブル特性実現に関する検討
鈴木淳之; 和田光司; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J87-C, 12, 1060-1069, Dec. 2004, Peer-reviwed, 本論文では,テューナブル特性を有する帯域通過フィルタ(BPF)の実現に着目し,最初にタップ結合型λ/4共振器に可変容量ダイオードを装荷することで,基本共振周波数及び減衰極のヂューナブル化について検討を行った.更に得られたλ/4共振器を用いたBPFを提案し,その中心周波数及び減衰極の位置制御について理論的及び実験的に検討を行ったので報告する.
Scientific journal, Japanese

A method for evaluating door structure of microwave oven
K Matsumoto; O Hashimoto; K Wada
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E87C, 11, 1997-2000, Nov. 2004, Peer-reviwed, In this paper, the amplitude coefficient in each mode of leakage waves is calculated by using the amplitude level of the electric field about these unwanted waves under Ministry of Economy, Trade and Industry (METI) definition for measuring the leakage waves irradiated from door portion at the time of microwave oven manufacture, and the percentage of each mode included in leakage waves is also calculated by using finite difference time domain (FDTD) method. Furthermore, shielding effectiveness (SE) of choke structure for suppressing the leakage waves is calculated using combined waves composed of higher order modes as each percentages. As a result, the percentage of each mode included in the leakage waves is examined quantitatively. The approximation analysis for the SE of the choke structure can also be carried out. Therefore, efficient method for evaluating the door structure of the oven at the time of manufacture has been established without the use of the memory in the calculation.
Scientific journal, English

A method for LTCC resonators to realize improved-resonant characteristics on reduced-size microstrip structure
RK Pokharel; K Wada; O Hashimoto; T Takahashi
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E87C, 9, 1517-1523, Sep. 2004, Peer-reviwed, This paper presents a new method to improve the resonant characteristics of a microstrip resonator. The improved characteristics have been achieved by inserting two dielectric rods between strip conductor and the ground plane. Dielectric rods to be inserted have higher relative permittivity than that of the substrate. Therefore, it is suitable to realize by Low-Temperature Cofired Ceramics (LTCC) technique. Several model of microstrip resonators employing the proposed method are analyzed by a Finite-Difference Time-Domain (FDTD) method, and their resonant characteristics are discussed. One of the advantages of the proposed method is that an attenuation pole (f(l) or f(h)) in each side of the fundamental resonant frequency (f(r)) and improved-spurious responses can be realized together by a capacitive-coupling tapped resonator loaded with dielectric rods. The proposed method is also effective to achieve sharp skirt characteristics and wide stopband of a direct-coupling tapped resonator which can be used either as a wideband lowpass filter or a band-elimination filter. Another interesting feature of the analyzed resonators is that about 60% reduction in resonator's length has been obtained compared to a basic half-wavelength (lambda/2) microstrip resonator. Therefore, wide exploitation of the proposed method can be expected in the filter design based on the LTCC technique.
Scientific journal, English

チューナブル特性を有するタップ結合型λ/4共振器BPFに関する理論的及び実験的検討
和田光司; 鈴木淳之; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J87-C, No.7, 584-585, Jul. 2004, Peer-reviwed, 本論文では,λ/4共振器帯域通過フィルタ(BPF)に可変容量ダイオードを用いることで,中心周波数及び減衰極のチューナブル化について理論的及び実験的に検討を行った.
Scientific journal, Japanese

Measurement of complex permittivity for liquid phantom by transmission line method using coaxial line
K Shibata; K Tani; O Hashimoto; K Wada
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E87C, 5, 689-693, May 2004, Peer-reviwed, This paper is focused on the measurement of the complex permittivity of a liquid phantom by the transmission line method using a coaxial line for measuring high-permittivity and high-loss materials. First, the complex permittivity of the liquid phantom material is measured under various physical lengths of the coaxial line for accurate measurement. Secondly, comparison between the measured result and the result obtained by the coaxial probe method is carried out in the frequency range from 0.5 to 3 GHz. Finally, the measurement error included in the complex permittivity is estimated quantitatively. The discussions lead to the conclusion that accurate measurement of the liquid material with high-permittivity and high-loss is possible by the presented method.
Scientific journal, English

Realisation of improved spurious responses and attenuation pole in stopband by microstrip resonator
RK Pokharel; K Wada; O Hashimoto; T Takahashi
ELECTRONICS LETTERS, IEE-INST ELEC ENG, 40, 8, 481-482, Apr. 2004, Peer-reviwed, Resonant characteristics of a microstrip resonator loaded with dielectric rods below a strip conductor are investigated by a finite-difference time-domain method. A tapped resonator employing the proposed method is capable of realising the improved spurious responses together with an attenuation pole in the stopband, and of reducing the resonator's length.
Scientific journal, English

Analytical study on variation of temperature and absorption characteristics of single-layer radiowave absorber by irradiation electric power
M Kato; R Suga; O Hashimoto; T Nakamura; K Wada
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 41, 1, 3-5, Apr. 2004, Peer-reviwed, In this study, the relative complex permittivity. of an epoxy resinous material is measured under changes in temperature. The temperature distribution of a single-layer radiowave absorber is analyzed using the FDTD-HTE method with measured relative complex permittivity, and then the irradiation electric power's temperature change inside the absorber is calculated. As a result, it is observed that the temperature inside the absorber increases rapidly, so that the irradiation electric power is high, and that the temperature of the absorber increases to 170degreesC after the irradiation during 120 min under the irradiation electric power with 1000 W/m(2). It is found that the absorption characteristics of the absorber vary rapidly when they are calculated using the abovementioned analytical results. (C) 2004 Wiley Periodicals, Inc.
Scientific journal, English

Improvement of harmonic responses of an MSL resonator based on LTCC technique
R.K.Pokharel; K.Wada; O.Hashimoto; T.Takahashi
Progress in Electromagnetic Research Symposium (PIERS), 28-31, Mar. 2004, Peer-reviwed
International conference proceedings, English

Microwave Resonators and Filters Using Uniplanar Lines
WADA Kouji; KAMIYAMA Tomohide; HASHIMOTO Osamu
IEEJ Transactions on Electronics, Information and Systems, The Institute of Electrical Engineers of Japan, 124, 2, 314-322, 01 Feb. 2004, This paper presents microwave resonators and filters fabricated with uniplanar lines such as a coplanar waveguide(CPW) and slot line(SL). We focus on an open-ended λ/2 resonator, short-ended λ/2 resonator and λ/4 resonator for fabricating the bandpass filters(BPFs). Various BPFs based on these resonators are presented and their characteristics are also discussed.
Japanese

FDTD法を用いた誘電体基板内部に棒状誘電体を周期的に配置したストリップ線路における帯域阻止特性の解析
沖本浩二; 和田光司; 高橋毅; 橋本修
電気学会論文誌(C), 124, 2, 375-380, Feb. 2004, Peer-reviwed
Scientific journal, Japanese

共振器混在型バンドパスフィルタによる減衰極の実現とその制御に関する一検討
和田 光司; 大野 貴信; 橋本 修
電気学会論文誌(C), 124-C, No.2, 341-349, Feb. 2004, Peer-reviwed
Scientific journal, Japanese

両端開放型マイクロストリップ結合線路を用いた帯域通過フィルタの高調波共振応答改善に関する検討
和田光司; 中川浩一; 大野貴信; 橋本修
電気学会論文誌(C), 124, 2, 350-356, Feb. 2004, Peer-reviwed
Scientific journal, Japanese

Realization and Location Control of Attenuation Poles by Bandpass Filters Using Mixed Resonators
Kouji Wada; Takanobu Ohno; Osamu Hashimoto
IEEJ Transactions on Electronics, Information and Systems, 124, 2, 341-349, 2004, Peer-reviwed, This paper describes the improvement of skirt characteristics of a bandpass filter (BPF) by using mixed tapped resonators. In this paper, we try to examine the transmission characteristics of the BPFs with a function to control the number of attenuation poles based on the use of a λ/2 resonator and a λ/4 resonator as the basics of the distributed constant line resonators. As a result, we have confirmed that realization of the attenuation poles than the number of the resonators, choice of the numbers of the realized poles and their location control. The miniaturization of the presented BPF is also accomplished as well as the location of the attenuation poles mentioned above. It has been confirmed that our proposal enables the control of the number of attenuation poles of the BPF. © 2004, The Institute of Electrical Engineers of Japan. All rights reserved.
Scientific journal, English

Improvement of Spurious Responses for Bandpass Filters Using Open-Ended Microstrip Coupled-Line
Kouji Wada; Kouichi Nakagawa; Takanobu Ohno; Osamu Hashimoto
IEEJ Transactions on Electronics, Information and Systems, 124, 2, 350-356, 2004, Peer-reviwed, This paper describes improvement of spurious responses for bandpass filters(BPFs) using an open-ended coupled-line. First, we examine the resonance characteristics of the tap-coupled open-ended resonator. Secondly, we examine the effectiveness of tap-coupling method to the BPF consisting of an open-ended microstrip coupled-line. Furthermore, improvement of the spurious responses of an edge-coupled BPF consisting of microstrip coupled-line is also examined theoretically and experimentally. It has been confirmed that proposed method is useful for improving the spurious responses of the BPFs consisting of the open-ended microstrip coupled-line. © 2004, The Institute of Electrical Engineers of Japan. All rights reserved.
Scientific journal, English

Analysis of Bandstop Characteristics of Stripline with Periodic Dielectric Rods Located inside Dielectric Substrate by FDTD Method
Koji Okimoto; Kouji Wada; Osamu Hashimoto; Takeshi Takahashi
IEEJ Transactions on Electronics, Information and Systems, 124, 2, 375-380, 2004, Peer-reviwed, Bandstop characteristics of a stripline with periodic dielectric rods inside the dielectric substrate are examined by the finite difference time domain (FDTD) method. As a result, we have provided the effective data of the center frequency, the bandwidth and the maximum attenuation level in the band stop characteristics under the condition that the interval between the dielectric rods, the side of the rod to the interval ratio and the number of grids are changed. © 2004, The Institute of Electrical Engineers of Japan. All rights reserved.
Scientific journal, English

New tapped distributed constant bandpass filters with manipulation of attenuation pole arrangement
K Wada; Y Aihara; K Nakagawa; O Hashimoto
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE, SCRIPTA TECHNICA-JOHN WILEY & SONS, 87, 8, 24-32, 2004, Peer-reviwed, A method for improving the characteristics near the passband by means of a bandpass filter (BPF) with distributed resonators using tap coupling is proposed. First, with regard to the open-ended lambda/2 resonator, a short-ended lambda/2 resonator and a one-end shorted lambda/4 resonator, improvement of the resonant characteristics is attempted by realization of attenuation, poles. Next, improvement of the characteristics near the passband by means of a BPF extensively using the basic performance of the resonator is studied. The results confirm that improvement of the resonant characteristics is possible by realization of attenuation poles near the fundamental resonant frequency by the use of an appropriate resonator with tap coupling. It is also confirmed that multipole characteristics and position control are easily realized near the passband by application of the fundamental characteristic to the BPF. (C) 2004 Wiley Periodicals, Inc.
Scientific journal, English

A 2-pole CPW resonator BPF with attenuation poles using point-coupled lambda/4 resonators
K Wada; M Tatsumi; T Kamiyama; O Hashimoto; H Harada
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 40, 2, 101-107, Jan. 2004, Peer-reviwed, The aim of this study is to examine a coplanar bandpass filter (BPF) with attenuation poles using point-coupled lambda/4 resonators. The first part of this paper describes the resonance characteristics of the lambda/4 resonators with chosen excitation methods. Secondly, the design of the BPF with attenuation poles rising the lambda/4 resonators is carried out based on general filter theory with narrowband approximation. A comparison between theory and experiment is also performed. It is confirmed that the method presented is useful for improving the BPF's skirt characteristics rising lambda/4 resonators. (C) 2004 Wiley Periodicals, Inc.
Scientific journal, English

Characteristics of three-dimensional periodic structure using LTCC materials
K Okimoto; K Wada; O Hashimoto; T Takahashi
PROCEEDINGS OF THE 2004 CHINA-JAPAN JOINT MEETING ON MICROWAVES, HARBIN INSTITUTE TECHNOLOGY PUBLISHERS, 49-52, 2004, Peer-reviwed, The three-dimensional periodic structure composed of two low temperature co-fired ceramic (LTCC) materials is proposed and measured by the transmission method, thereby the bandstop behavior of the proposed sample is confirmed experimentally. Additionally, the bandstop characteristics of the sample are also examined by the finite difference time domain (FDTD) method when the interval between dielectric dots and the size of dielectric dot are changed.
International conference proceedings, English

Analytical study on change of temperature and absorption characteristics of single-layer radiowave absorber to irradiation electric power
R Suga; O Hashimoto; Y Nikawa; K Wada
PROCEEDINGS OF THE 2004 CHINA-JAPAN JOINT MEETING ON MICROWAVES, HARBIN INSTITUTE TECHNOLOGY PUBLISHERS, 235-238, 2004, Peer-reviwed, In this study, the relative complex permittivity of an epoxy resinous material is measured under the temperature change. The temperature distribution of a single-layer radiowave absorber is analyzed by FDTD-HTE method using the measured relative complex permittivity, and then the temperature change inside the absorber to the irradiation electric power is calculated. As a result, it is observed that the temperature inside the absorber increases rapidly, so that the irradiation electric power is high, and that the temperature of the absorber increases to 170degreesC after the irradaiation during 120 minutes under the irradiation electric power with 1000W/m(2). It can be seen that the absorption characteristics of the absorber are varied rapidly when the absorption characteristics are calculated under the use of the analytical result above.
International conference proceedings, English

A class of a planar triplexer by manipulating multiple attenuation poles
T Ohno; K Wada; O Hashimoto
34TH EUROPEAN MICROWAVE CONFERENCE, VOLS 1-3, CONFERENCE PROCEEDINGS, HORIZON HOUSE PUBLICATIONS LTD, 625-628, 2004, Peer-reviwed, This paper focuses on a planar triplexer consisting of bandpass filters (BPFs) using different kinds of tapped resonators. The design methodology of proposed triplexer is established by using general filter theory with narrow band approximation. The results show that the triplexer produces desired three passband, manipulation of multiple attenuation poles and good isolation characteristics without increasing the number of elements.
International conference proceedings, English

Realization of low spurious responses by various bandpass filters using open-ended lambda/2 resonators
K Wada; T Ohno; K Nakagawa; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E86C, 12, 2394-2402, Dec. 2003, Peer-reviwed, This paper focuses on the realization of low spurious responses by various bandpass filters (BPFs) using open-ended lambda/2 resonators. The first part of this paper gives the resonance characteristics of the open-ended lambda/2 resonators when the excitation methods are chosen. Secondly, various BPFs obtained with our methodology are provided. For constructing the BPF, (1) point-coupled resonators, (2) comb-line resonators, (3) quasi comb-line resonators and (4) parallel-coupled resonators are used. It is verified that the presented BPFs can be used to obtain low spurious responses both theoretically and experimentally.
Scientific journal, English

Location of multiple transmission zeros by tap-coupling technique for bandpass filters and duplexers using short-ended lambda/2 resonators
K Wada; Y Aihara; T Kamiyama; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E86C, 12, 2403-2411, Dec. 2003, Peer-reviwed, In this paper, the method of locating multiple transmission zeros by the tap-coupling technique is described for bandpass filters (BPFs), using short-ended lambda/2 resonators and its application to a duplexer. First, the method of locating the transmission zero using the short-ended lambda/2 resonators is examined with various excitation methods. We focus on four types of short-ended lambda/2 resonators: the end-coupling type, tap-coupling type, capacitive tap-coupling type and inductive tap-coupling type. Secondly, the BPFs based on the basic characteristics of the respective resonators are proposed and designed on the basis of a general filter theory with narrow band approximation. Lastly, we propose and design new duplexers consisting of the proposed BPFs. The results lead to the conclusion that the basic characteristics of the short-ended lambda/2 resonators are useful for realizing a BPF with multiple transmission zeros and a high-performance duplexer fabricated without increasing the number of elements.
Scientific journal, English

LCタップ結合型λ/4共振器における減衰極の実現とその位置制御
和田 光司; 神山 智英; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J86-C, 12, 1364-1365, Dec. 2003, 本論文では,従来のタップ結合型λ/4共振器及び,誘導性素子と容量性素子の併用によるLCタップ結合型λ/4共振器の基本性能に着目し,その共振特性について比較検討することでLCタップ結合型共振器が基本共振周波数近傍への減衰極の配置に有効であることを確認した.
Scientific journal, Japanese

減衰極の制御機能を有するBPFを用いた多極型トリプレクサに関する基礎検討
大野 貴信; 和田 光司; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J86-C,, 11, 1220-1221, Nov. 2003, Peer-reviwed, 本論文では,タップ結合を適用したλ/4共振器とλ/2共振器を組み合わせて,減衰極の制御機能を有する帯域通過フィルタ(BPF)を構成し,その基本性能を積極的に生かしたトリプレクサを提案し,その設計及び特性の計算を行った.結果より,減衰極の制御機能が帯域外特性改善及びアイソレーション特性の向上に有効であり,比較的部品数が少ない構成で多極型トリプレクサが設計できることを確認した.
Scientific journal, Japanese

Improved spurious responses of a BPF using lambda/4 MSL resonators with the tap-coupling technique
K Wada; A Suzuki; O Hashimoto; H Harada
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 39, 4, 311-314, Nov. 2003, Peer-reviwed, The improvement of spurious responses of a lambda/4 resonator bandpass filter (BPF) using a microstrip line (MSL) is carried out. Firstly, a basic mechanism for improving the resonance responses of the lambda/4 resonator, under the condition that the excitation method is changed, is presented. Secondly, on the basis of the above proposal, the BPF is demonstrated as an example. It is confirmed that the lambda/4 resonator using the tapcoupling technique can improve the spurious responses of the BPF using lambda/4 resonators. (C) 2003 Wiley Periodicals, Inc.
Scientific journal, English

λ/4共振器における入出力結合方法を用いた共振特性の改善
和田 光司; 鈴木 淳之; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J86-C, 9, 1026-1027, Sep. 2003, Peer-reviwed, λ/4共振器について,その入出力結合方法を選択した場合の共振特性の変化に関して理論的及び実験的検討を行った.結果より,従来のλ/4共振器への入出力結合方法に更にタップ結合方式を導入することで,共振特性において基本共振周波数の低域側,高域側,更に両側に減衰極の配置が可能であることを確認した.
Scientific journal, Japanese

A class of a planar duplexer consisting of BPFs with attenuation poles designed by manipulating tapped resonators
K Wada; T Ohno; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E86C, 8, 1613-1620, Aug. 2003, Peer-reviwed, In this paper we describe the investigation of design methodology of a planar duplexer consisting of BPFs using mixed tapped resonators. Firstly, we propose the planar duplexer consisting of bandpass filters (BPFs) using a tapped open-ended lambda/2 resonator and a tapped lambda/4 resonator. The duplexer is designed based on the general filter theory with narrow band approximation and tap-coupling technique. The actual duplexer is fabricated using a coplanar waveguide (CPW). Secondly, down-sizing of the planar duplexer is carried out based on the BPF using stepped impedance resonators (SIRs). Lastly, another type of duplexer consisting of different BPFs using mixed tapped resonators is investigated in the same manner. The results of this study lead us to the conclusion that the design methodology is useful for realizing the high-performance planar duplexer fabricated without increasing the number of elements.
Scientific journal, English

タップ結合SIRを用いた有極特性を有するBPFに関する基礎的検討
和田 光司; 大野 貴信; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J86-C, No.6, 652-653, Jun. 2003, Peer-reviwed, 本論文では,タップ結合を適用した両端開放インピーダンスステップ型共振器(SIR)と一端接地SIRで構成した共振器混在型帯域通過フィルタ(BPF)を提案し,その設計,試作実験を行うことで,本フィルタの基本性能及びその有効性を示した.
Scientific journal, Japanese

減衰極の位置制御が可能な新しいタップ形式を適用した分布定数形帯域通過フィルタ
和田 光司; 相原 良行; 中川 浩一; 橋本 修
電子情報通信学会論文誌(A), The Institute of Electronics, Information and Communication Engineers, J86-A, No.4, 447-455, Apr. 2003, Peer-reviwed, タップ結合を適用した分布定数型共振器を用いた帯域通過フィルタ(BPF)により,通過帯域近傍の特性改善を図る一手法を提案する.まず分布定数型共振器の基本となる両端開放型λ/2共振器,両端接地型λ/2共振器及び一端接地型λ/4共振器について,減衰極の実現による共振特性改善を図った.次に,それぞれの共振器の基本性能を積極的に用いたBPFにより,通過帯域近傍の特性改善について検討を行った.結果より,タップ結合を適用した各々の共振器を用いることで,基本共振周波数近傍への減衰極実現による共振特性改善が可能であることを確認した.また,その基本性能のBPFへの適用により,簡易的に通過帯域近傍への多極特性の実現及びその位置制御が可能であることを確認した.
Scientific journal, Japanese

共振器混在型BPFを用いたプレーナ型アンテナ共用器に関する基礎的検討
大野 貴信; 和田 光司; 橋本 修
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J86-C, No.4, 474-475, Apr. 2003, Peer-reviwed, 本論文では,タップ結合を適用した両端開放型λ/2共振器と一端接地型λ/4共振器を組み合わせた共振器混在型帯域通過フィルタ(BPF)の基本性能を積極的に利用したプレーナ型アンテナ共用器を提案し,その伝送特性について理論的及び実験的検討を行った.
Scientific journal, Japanese

An empirical study of a coplanar bandpass filter with attenuation poles using short-ended half-wavelength resonators
K Wada; Y Aihara; O Hashimoto; H Harada
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E86A, 2, 273-279, Feb. 2003, Peer-reviwed, Basic characteristics of a short-ended half-wavelength resonator made of a coplanar waveguide (CPW) and their applications to bandpass filters (BPFs) are discussed. The first part of this paper gives the essence for improving out-of-band characteristics of the BPF by describing the basic characteristics of a tap-coupled resonator. Secondly, a new BPF with attenuation poles using the short-ended half-wavelength CPW resonators is proposed and realized. It is confirmed that our methodology is useful for improving out-of-band characteristics of the BPF using the short-ended half-wavelength CPW resonators without complicated filter design.
Scientific journal, English

An effective method for designing bandpass filters using gimel/4 resonators for improving out-of-band characteristics
K Wada; T Kamiyama; S Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E86C, 2, 150-161, Feb. 2003, Peer-reviwed, A design methodology of bandpass filters: (BPFs) using lambda/4 resonators for improving out-of-band characteristics is proposed. Firstly, the basic characteristics of various lambda/4 resonators are examined. In this study, we focus on four types of lambda/4 resonators, i.e., (1) direct-coupled lambda/4 resonator. (2) loaded-element lambda/4 resonator, (3) tapped lambda/4 resonator and (4) loaded-element tapped lambda/4 resonator. Secondly. the application examples of BPFs with improved out-of-band characteristics are provided. We examine the improvement of filter characteristics, i.e., sharp skirt characteristics and low spurious responses. The results of this study lead us to the conclusion that the methodology is very useful for improving the out-of-band characteristics of the BPFs using the lambda/4 resonators.
Scientific journal, English

A planar duplexer consisting of mixed BPFs using different tapped resonators
T Ohno; K Wada; O Hashimoto
BOSTON 2003 RADIO & WIRELESS RAWCON CONFERENCE, PROCEEDINGS, IEEE, 377-380, 2003, Peer-reviwed, This paper presents a planar duplexer consisting of mixed bandpass filters(BPFs) using different tapped resonators. The duplexer is designed based on the general filter design and tap-coupling technique. The actual duplexer is fabricated by coplanar waveguide(CPW) structure. The results of this study lead us to the conclusion that the proposal is useful for realizing the high performance planar duplexer fabricated without increasing the number of elements.
International conference proceedings, English

λ/2共振器を用いたマイクロストリップ線路フィルタによる帯域外特性改善法
中川 浩一; 和田 光司; 橋本 修
エレクトロニクス実装学会論文誌, Vol.6, No.3, 234-239, 2003, Peer-reviwed
Scientific journal, Japanese

Effective Methods for Designing Planar Microwave Filters Using Multifunctional Resonators and Their Applications
K.Wada; O.Hashimoto
Progress in Electromagnetics Research Symposium 2003, -, 2003, Peer-reviwed
International conference proceedings, English

Methodology for Improving Skirt Characteristics/ Spurious Responses of Planar Bandpass Filters Using Half-Wavelength Resonators
K.Wada; O.Hashimoto
Progress in Electromagnetics Research Symposium 2003, -, 2003, Peer-reviwed
International conference proceedings, English

A Basic Study of Microstrip Coupled-Line Bandpass Filters Using Different Resonators
K.Wada; Y.Aoki; T.Ohno; O.Hashimoto
Progress in Electromagnetics Research Symposium 2003, -, 2003, Peer-reviwed
International conference proceedings, English

An Experimental Study on a Microstrip Line Bandpass Filter Using Tapped Coupled-Line for Low Spurious Responses
K.Wada; M.Tatsumi; T.Kamiyama; O.Hashimoto
Progress in Electromagnetics Research Symposium 2003, -, 2003, Peer-reviwed
International conference proceedings, English

Transmission Characteristics of Stripline with Periodic Dielectric Rods Inside Dielectric Substrate
K.Okimoto; K.Wada; T.Takahashi; O.Hashimoto
2003Asia-Pacific Microwave Conference, -, 2003, Peer-reviwed
International conference proceedings, English

3-pole bandpass filters using short-ended half-wavelength resonators and their applications to a duplexer
K Wada; Y Aihara; T Kamiyama; O Hashimoto
2003 IEEE TOPICAL CONFERENCE ON WIRELESS COMMUNICATION TECHNOLOGY, IEEE, -, 160-163, 2003, Peer-reviwed, This paper presents bandpass filters(BPFs) using short-ended half-wavelength resonators for out-of-band rejection and their applications to a duplexer. The BPFs with out-of-band rejection are provided. Finally, we propose and design the new duplexers consisting of the proposed BPFs. The results of this study lead us to the conclusion that our proposals about the BPF and the duplexer are useful for realizing the good characteristics without incresing the number of elements.
International conference proceedings, English

A planar duplexer consisting of mixed bandpass filters using different tapped resonators
T Ohno; K Wada; O Hashimoto
33RD EUROPEAN MICROWAVE CONFERENCE, VOLS 1-3, CONFERENCE PROCEEDINGS, HORIZON HOUSE PUBLICATIONS LTD, -, 163-166, 2003, Peer-reviwed, This paper presents a planar duplexer consisting of mixed bandpass filters(BPFs) using different tapped resonators. The duplexer is designed based on the general filter theory and tap-coupling technique. The actual duplexer is fabricated by coplanar waveguide(CPW) structure. The results of this study lead us to the conclusion that the proposal is useful for realizing the high performance planar duplexer fabricated without increasing the number of elements.
International conference proceedings, English

Wideband suppression of spurious responses realized by microstrip resonators loaded with dielectric rods
Ramesh K. Pokharel; K. Wada; O.Hashimoto; T.Takahashi
Proc. of ISSSE, -, 2003, Peer-reviwed
International conference proceedings, English

An efficient analysis on door structure of a microwave oven using combined waves of higher order modes
K Matsumoto; O Hashimoto; K Wada
33RD EUROPEAN MICROWAVE CONFERENCE, VOLS 1-3, CONFERENCE PROCEEDINGS, HORIZON HOUSE PUBLICATIONS LTD, 1171-1174, 2003, Peer-reviwed, This paper describes propagation modes of leakage waves irradiated from a microwave oven examined by using finite difference time domain(FDTD) method. In this study, the amplitude coefficient in each mode of leakage waves is calculated under the use of the amplitude level of the electric field about these unwanted waves, and the percentage of each mode is also calculated. Furthermore, shielding effectiveness(SE) of choke structure for suppressing the leakage waves is calculated using combined waves composed of the higher order modes as each percentages. As a result, the percentage of each mode included in the leakage waves is examined quantitatively. The approximation analysis of the SE of the choke structure can also be carried out. Therefore, efficient method for analyzing the door structure of the oven has been established without the use of the memory for the calculation.
International conference proceedings, English

Analytical Study on Change of Temperature and Absorption Characteritics of Single-layer Radiowave Absorber to Irradiation Electric Power
Masanori Kato; Osamu Hashimoto; Takayuki Nakamura; Kouji Wada
The 19th Annual Review of Progress in Appilied Computational Electromagnetics, 783-788, 2003, Peer-reviwed
International conference proceedings, English

Estimation of Complex Permittivity Using Rectangular Waveguide with Flange at 10GHz
Koji Shibata; Osamu Hashimoto; Kouji Wada
789-794, 2003, Peer-reviwed
International conference proceedings, English

誘電体基板内部に棒状誘電体を周期的に配置したマイクロストリップ 線路の伝送特性に関する検討
鈴木 進介; 和田 光司; 橋本 修; 高橋 毅
電子情報通信学会論文誌(C), The Institute of Electronics, Information and Communication Engineers, Vol.J85-C, No.11, 1038-1039, Nov. 2002, Peer-reviwed, マイクロストリップ線路における誘電体基板内部に周期的に棒状誘電体を配置したときの,誘電体格子の間隔及び大きさの変化に対する伝送特性をFDTD法により解析した.結果より,構成の変化に対して中心周波数,最大遮断レベル,阻止帯域幅の変化傾向を定量的に示した.
Scientific journal, Japanese

New BPF with Multiple Attenuation Poles Based on Mixed SIR's and Its Application to a Duplexer
K.Wada; T.Ohno; O.Hashimoto
2002 Asia-Pacific Microwave Conference, Vol.1, 528-530 (Nov. 2002), Nov. 2002, Peer-reviwed
International conference proceedings, English

Methodology of Wide-Band Suppression of Spurious Responses for λ/2 Resonator BPFs
K.Wada; K.Nakagawa; T.Ohno; O.Hashimoto
2002 Asia-Pacific Microwave Conference, Vol.1, 524-527, Nov. 2002, Peer-reviwed
International conference proceedings, English

Technique for Improving Out-of- Band Characteristics of a Short-Ended λ/2 CPW Resonator BPF
K.Wada; Y.Aihara; T.Kamiyama; O.Hashimoto
2002 Asia-Pacific Microwave Conference, Vol.1, 520-523, Nov. 2002, Peer-reviwed
International conference proceedings, English

New Wave Absorber Using Resistive Film for ETC System
Masahiro Hanazawa; Osamu Hashimoto; Kouji Wada
EMC Europe 2002 International Symposium on Electromagnetc Compatibility, Vol.2, 11, 703-705, Sep. 2002, Peer-reviwed
International conference proceedings, English

Fundamental study of a lambda/4 wave absorber using FSS for two frequencies
A Itou; K Wada; O Hashimoto
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 33, 5, 321-322, Jun. 2002, Peer-reviwed, The aim is to study basic characteristics of a frequency selective surface (FSS) for two frequencies and its application to the wave absorbers using the FSS for two frequencies, which are fabricated by two absorption films. In this study, the shielding characteristics with the frequency-selection by FSS, absorption, and shielding characteristics of the proposed wave absorber using FSS are examined experimentally. Good performance of the FSS and the wave absorber using FSS were obtained, as expected. (C) 2002 Wiley Periodicals, Inc.
Scientific journal, English

マイクロ波帯における周期的に配列した棒状誘電体の透過特性に関する検討
鈴木 進介; 和田 光司; 高橋 毅; 橋本 修
電子情報通信学会論文誌(C), Vol.J85-C, No.4, 310-313, Apr. 2002, Peer-reviwed
Scientific journal, Japanese

Design of bandpass filters with a function to control the number of attenuation poles
K Wada; Y Yamamoto; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E85C, 3, 578-585, Mar. 2002, Peer-reviwed, New bandpass filters (BPFs) with stub resonators are proposed for creating multiple attenuation poles. Firstly, the stub-dependent characteristics of the distributed-element stubs are examined theoretically. Secondly, the new BPFs with resonators of combined stubs are proposed. An advant age of these filters is the possibility of controlling the number of attenuation poles. The design of the proposed filter is carried out based on the general filter design with the narrow-band approximation technique. The transmission and reflection characteristics of the proposed BPFs are also examined theoretically and experimentally. The miniaturization of the filters is also carried out using the resonator with loaded-element stubs. The discussions lead Lis to the conclusion that the proposed design method of the filters are useful for controlling the number of attenuation poles of the BPF.
Scientific journal, English

Technique for improving out-of-band characteristics of planar microwave filters using tapped resonators
K Wada; K Nakagawa; O Hashimoto; H Harada
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E85C, 2, 391-399, Feb. 2002, Peer-reviwed, A simple method for improving out-of-band characteristics of a planar microwave filter is proposed. We clarify the close relationship among 'tap connection,' 'attenuation pole' and 'spurious responses' in filter design, theoretically and experimentally. Firstly, the basic characteristics of the resonator depending on the excitation method are examined. We show that skirt characteristics can be improved and spurious responses can be suppressed by using the tap connection technique. Secondly, the application examples of bandpass filters (BPFs) on the basis of the resonator with our principle are provided. It is confirmed that the resonator depending on the excitation method is useful for improving out-of-band characteristics of the planar microwave filter.
Scientific journal, English

Technique for improving out-of-band characteristics of planar microwave filters using tapped resonators
Kouji Wada; Kouichi Nakagawa; Osamu Hashimoto; Hiroshi Harada
IEICE Transactions on Electronics, Institute of Electronics, Information and Communication, Engineers, IEICE, E85-C, 2, 391-399, 2002, A simple method for improving out-of-band characteristics of a planar microwave filter is proposed. We clarify the close relationship among 'tap connection,' 'attenuation pole' and 'spurious responses' in filter design, theoretically and experimentally. Firstly, the basic characteristics of the resonator depending on the excitation method are examined. We show that skirt characteristics can be improved and spurious responses can be suppressed by using the tap connection technique. Secondly, the application examples of bandpass filters (BPFs) on the basis of the resonator with our principle are provided. It is confirmed that the resonator depending on the excitation method is useful for improving out-of-band characteristics of the planar microwave filter.
Scientific journal, English

New technique for suppressing spurious responses of planar bandpass filters using λ/2 resonators
Kouji Wada; Kouichi Nakagawa; Osamu Hashimoto
2002 32nd European Microwave Conference, EuMC 2002, IEEE Computer Society, Vol.2, 565-568, 2002, Peer-reviwed, A method for suppressing spurious responses of planar bandpass filters (BPFs) using λ/2 resonators is proposed. We show that the spurious responses of the BPF can be suppressed by using the the resonator with the tap-connection technique and refer to the application examples of BPFs and coupled-line BPFs are provided. It has been confirmed that the resonator depending on the excitation method is useful for suppressing spurious responses of the planar BPF. © 2002 IEEE.
International conference proceedings, English

筐体内に配置された電波吸収体の効果的な電磁界抑制に対する一検討
小玉和輝; 小野裕司; 和田 光司; 橋本 修
エレクトロニクス実装学会論文誌, Vol.5, No.6, 582-586, 2002, Peer-reviwed
Scientific journal, Japanese

Technique for Suppressing Spurious Responses of MSL-BPFs Using Tapped λ/2 Resonators
K.Wada; K.Nakagawa; O.Hashimoto; H.Harada
2002 Wireless Design Conference, -, 2002, Peer-reviwed
International conference proceedings, English

A Bandpass Filter Using Short-Ended Half-Wavelength CPW Resonators
K.Wada; Y.Aihara; O.Hashimoto
2002 Wireless Design Conference, -, 2002, Peer-reviwed
International conference proceedings, English

New tap-coupling technique for improving skirt characteristics of a lambda/4 resonator bandpass filter by placement of attenuation poles
K Wada; Y Aihara; K Nakagawa; O Hashimoto
APCCAS 2002: ASIA-PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS, VOL 1, PROCEEDINGS, IEEE, -, 359-362, 2002, Peer-reviwed, Improvement of skirt characteristics of a lambda/4 resonator bandpass filter(BPF) is carried out by placement of attenuation poles. In this study, the characteristics of the tapped-resonator are effectively used because the attenuation pole can easily be realized and external Q of the resonator can be controlled. However, the technique includes the limitation of flexibility for the placement control of the attenuation pole. Therefore, we try to improve flexibility for placement control of the attenuation pole under the characteristics of the lumped-element loaded stub. It has been clarified that the proposed technique is useful for improving the skirt characteristics of the lambda/4 resonator BPF.
International conference proceedings, English

An Effective Method for Designing a Bandpass Filter Using Quarter-Wavelength Resonators for Improving Out-of-Band Characteristics
K.Wada; T. Kamiyama; O.Hashimoto
Korea-Japan Microwave Workshop 2002, -, 101-104, 2002, Peer-reviwed
International conference proceedings, English

Design and Simulation of Microwave Filters for Improving Out-of-band Characteristics
K.Wada; T.Kamiyama; Y.Aihara; O.Hashimoto
The Applied Computational Electromagnetics Society, -, 2002, Peer-reviwed
International conference proceedings, English

Estimation of complex permittivity using rectangular waveguide with flange by FDTD method
K Shibata; O Hashimoto; K Wada
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E84C, 7, 977-980, Jul. 2001, Peer-reviwed, A method for estimating complex permittivity of a material using a rectangular waveguide with a flange is presented by the finite difference time domain (FDTD) method. An advantage of the present method is that it is not necessary to vary the material structure in order to insert it into the waveguide. Therefore estimation errors related to the dimensions of the material are almost negligible. In this case, fluoridated rubber is chosen as the low-loss material. The comparison of the complex permittivity of the material determined by the present method with FDTD and the conventional waveguide method at 10 GHz is performed. It uas confirmed that the present method is effective for estimating the complex permittivity under the condition that the length of the flange is about 50 mm (1.7 lambda) square.
Scientific journal, English

Design of 3-pole Tapped Resonator Bandpass Filter with Multiple Attenuation Poles and Its Miniaturization
K.Wada; Y.Yamamoto; O.Hashimoto
2001 International Symposium on Signals, Systems, and Electronics, 339-342, Jul. 2001, Peer-reviwed
International conference proceedings, English

An experimental study of a gimel/4 wave absorber using a frequency-selective surface
A Ito; H Ebara; H Nakajima; K Wada; O Hashimoto
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 28, 5, 321-323, Mar. 2001, Peer-reviwed, The aim of this paper is to study a basic characteristic of a frequency-selective surface (FSS) and its application to a lambda /4 wave absorber. In this study, the shielding characteristics with frequency selection by an FSS, and the absorption and shielding characteristics of the proposed lambda /4 wave absorber on the basis of an FSS are examined experimentally. Consequently, good performances of the FSS and the lambda /4 wave absorber using an FSS were obtained, as expected. (C) 2001 John Wiley & Sons, Inc.
Scientific journal, English

A method for improving spurious responses of a half-wavelength MSL resonator BPF
K Wada; K Nakagawa; O Hashimoto; H Harada
11TH INTERNATIONAL CONFERENCE MICROWAVE & TELECOMMUNICATION TECHNOLOGY, CONFERENCE PROCEEDINGS, WEBER PUBLISHING CO, 456-457, 2001, Peer-reviwed, New Improvement technique of spurious responses for a half-wavelength microstrip line (MSL) resonator bandpass filter (BPF) is proposed. Firstly, basic operations of a tapped half-wavelength resonator are examined theoretically and experimentally. The application to MSL resonator BPFs are also presented. It is confirmed that the present concept is useful for improving spurious responses of the microwave filter.
International conference proceedings, English

Improvement Techniques of Out-of-Band Characteristics for Planar Microwave Filters
K.Wada; O.Hashimoto
Progress in Electromagnetics Research Symposium (PIERS 2001), 286, 2001, Peer-reviwed
International conference proceedings, English

Improvement of harmonic responses of a lambda/4 resonator BPF with tap-connection technique
K Wada; A Suzuki; O Hashimoto; H Harada
RAWCON 2001: IEEE RADIO AND WIRELESS CONFERENCE, PROCEEDINGS, IEEE, 65-68, 2001, Peer-reviwed, Improvement of harmonic responses for a lambda /4 resonator bandpass filter(BPF) using a microstrip line (MSL)is carried out. Firstly, a basic mechanism for improving the harmonic responses of the lambda /4 resonator under the condition that the excitation procedure is changed. Secondly, a BPF on the basis of our proposal is presented, as an example. It is confirmed that the lambda /4 resonator with the tap-connection technique is of great use for improving the harmonic responses of the microwave filters.
International conference proceedings, English

A design method of a 2-pole tapped resonator BPF with multiple attenuation poles and its miniaturization
K Wada; Y Yamamoto; O Hashimoto; H Harada
APMC 2001: ASIA-PACIFIC MICROWAVE CONFERENCE, VOLS 1-3, PROCEEDINGS, IEEE, 1111-1114, 2001, Peer-reviwed, A design of a 2-pole bandpass filter (BPF) with multiple attenuation poles is performed. In this study, the multiple attenuation poles are realized by using the combination technique of two different tapped resonators. Miniaturization of tile BPF with multiple attenuation poles is also realized on the basis of the loaded-element resonators (LERs). It is confirmed that our proposal is of great use for creating multiple attenuation poles by tile few number of the resonators.
International conference proceedings, English

A method for improving out-of-band characteristics of lambda/2 microstrip line resonator bandpass filters
K Wada; K Nakagawa; O Hashimoto; H Harada
APMC 2001: ASIA-PACIFIC MICROWAVE CONFERENCE, VOLS 1-3, PROCEEDINGS, IEEE, 637-640, 2001, Peer-reviwed, Improvement of out-of-band characteristics for a bandpass filter(BPF) using lambda/2 microstrip line (MSL) resonators is carried out. The basic operations of a tapped lambda/2 resonator are examined theoretically and experimentally. The application to MSL resonator BPF with improved spurious responses are also examined. An extended 2-pole BPF with improved skirt characteristics and target spurious response is proposed and realized. It is confirmed that the present concept is great useful for improving out-of-band characteristics of the lambda/2 resonator BPFs.
International conference proceedings, English

High performances of X-band wave absorber for TE and TM polarizations using transparent resistive film
M. Hanazawa; H. Yokokawa; O. Hashimoto; K. Wada
2001 31st European Microwave Conference, EuMC 2001, IEEE Computer Society, Vol.3, 227-230, 2001, Peer-reviwed, An X-band transparent wave absorber for TE and TM wave polarizations is examined theoretically and experimentally. In the case of both polarizations, the absorption of 20dB or more was obtained at the frequency ranging from 8.5 to 11.5 GHz, and the incident angle between 0 and 40 degrees under the target frequency of 10 GHz and the target incident angel of 20 degrees. The optical transmittivities of the presented wave absorber of about 80% or more was also obtained, as expected. © 2001 IEEE.
International conference proceedings, English

An Experimental Study of a λ/4 Wave Absorber Using FSS for Two Frequencies
Akihiko Ito; Kouji Wada; Osamu Hashimoto
2001 Korea-Japan AP/EMC/EMT Joint Conference, 242-245, 2001, Peer-reviwed
International conference proceedings, English

Fundamental Study of Wave Absorber Using Resistive-Film at 700GHz Band
Masahiro Hanazawa; Yasuhiko Abe; Osamu Hashimoto; Yoshizumi Yasuoka; Kouji Wada
2001 IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting, URSI DIGEST, 28, 2001
International conference proceedings, English

Fundamentals of open-ended resonators and their application to microwave filters
K Wada; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E83C, 11, 1763-1773, Nov. 2000, Peer-reviwed, The aim of this study is to examine the effectiveness of various open-ended resonators. According to the required filter responses, the application to microwave filters based on presented open-ended resonators is systematically examined as well. First, the resonance property of the basic open-ended resonator is discussed based on even-and odd-mode analysis. The intrinsic property of a tapped open-ended resonator is-also discussed here. Second, the basic properties of a stepped impedance resonator (SIR) and a loaded-element resonator are examined theoretically for improvement of spurious responses and the dual-passband response. The basic operations of these resonators are also explained based on even- and odd-mode analysis. Examples for filter applications based on presented resonators are also provided. We found that the intrinsic properties of the open-ended resonators are very useful for practical filter responses.
Scientific journal, English

An Effective Property of a Tapped Resonator for a Micro- wave Filter
K.Wada; O.Hashimoto
Korea-Japan Microwave Workshop, Proceedings, -, Sep. 2000, Peer-reviwed
International conference proceedings, English

Measurement of radar cross section for a truck and bus under an open field in 60 GHz band
M Haruta; H Ishizaka; O Hashimoto; J Ueyama; K Wada
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 25, 4, 243-246, May 2000, Peer-reviwed, Recently, the investigation of a collision-warning system (CWS) has spurred a growing interest in 60 Ghz band applications. The performance of the CWS is examined by the maximum detection range, the minimum detectable width,and the accuracy of the detection distance. It is important to examine the radar cross section(RCS) of the target because the maximum detection range and the minimum detectable width depend on the target size. The measurement of the reflection characteristics under a short distance was examined previously. RCS data should be measured under the far-field condition, where the CWS is usually in the range of 20-100 m. In this study, we examine the reflection characteristics of a truck and a bus under an open field in the 60 GHz band. It is found out that the RCS of the truck and the bus under horizontal polarization are in the range of 15-37 and 12-51 dBm(2), respectively. (C) 2000 John Wiley & Sons, Inc.
Scientific journal, English

Weatherability of 60 GHz wave absorber using epoxy-modified urethane rubber mixed with carbon particles
T Soh; K Wada; O Hashimoto
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E83C, 3, 496-501, Mar. 2000, Peer-reviwed, An epoxy-modified urethane rubber mixed with carbon particles is now chosen as the millimeter-wave absorber material in our study. The absorption characteristics of the absorber is measured under temperature changes. The weatherability of our absorber is also clarified based on absorption characteristics, thickness and hardness of the sample. As a result of the temperature characteristics of the absorber, the difference of the maximum absorption frequency under temperature changes is about 1 GHz, however the absorption of 20 dB or more is obtained between 54 and 58 GHz. The result of accelerated artificial exposure test is that 2.8% of the thickness of our sample is shrunk after 1000 hour exposure, and the hardness of rubber is hardened with increasing test time. It is also confirmed that the deterioration of the absorption ranges from 1 to 3 dB, although the absorption of about 20 dB is kept at the frequency range. As a consequence, it is confirmed that the wave absorber using the epoxy-modified urethane rubber mixed with carbon particles has good weatherability including our desired temperature characteristics, and it is suitable for outdoor use.
Scientific journal, English

Wideband wave absorber at X frequency band using transparent resistive film
M Haruta; K Wada; O Hashimoto
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, JOHN WILEY & SONS INC, 24, 4, 223-226, Feb. 2000, Peer-reviwed, A wideband wave absorber at X frequency band using a two-layered transparent resistive film is proposed. The design of the present wave absorber is carried out by using the transmission-line model in our study. The optimum values of design parameters such as surface resistance of the resistive film and thickness of the spacer and determined by the Newton method. The fabrication process of our absorber is also described briefly here. As a result, we have confirmed that the transparent wave absorber has two peaks of about 30 dB absorption, and an absorption of 17 dB or more at the frequency range between 8.3 and 11.6 GHz in our expectation. (C) 2000 John Wiley & Sons, Inc.
Scientific journal, English

A method for creating multiple attenuation poles by a microwave filter based on tapped resonators
K Wada; O Hashimoto
RAWCON2000: 2000 IEEE RADIO AND WIRELESS CONFERENCE, PROCEEDINGS, IEEE, 171-174, 2000, Peer-reviwed, According to the improvement of out-of-passband characteristics for microwave filters, a method for creating multiple attenuation poles is proposed by a tapped bandpass filter (BPF) based on the combination of basic resonators.
In this paper, we present new BPFs on the basis of the combination of three types of basic resonators. As a result, multiple attenuation poles are easily obtained by the tapped BPF. This study lead vs to the conclusion that the tapped BPF based on our concept is very useful for improving out-of-passband characteristics.
International conference proceedings, English

Basic Operations of Open-Ended Resonators and Their Application to Microwave Filters
K.Wada; O.Hashimoto
2000 Asia-Pacific Microwave Conference, no.308, 1298-1301, 2000, Peer-reviwed
International conference proceedings, English

Wave Absorber Using Transparent Resistive-Film for 1GHz Frequency Band
Masahiro Hanazawa; Kouji Wada; Osamu Hashimoto
Proceeding of 2000 IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting, URSI DIGEST-16.2, 216, 2000, Peer-reviwed
International conference proceedings, English

An X-band transparent wave absorber using an ITO resistive-film for oblique incident wave
Masahiro Hanazawa; Osamu Hashimoto; Kouji Wada
2000 30th European Microwave Conference, EuMC 2000, IEEE Computer Society, Vol.2, 146-149, 2000, Peer-reviwed, Performances of a presented X-band transparent wave absorber for an oblique incidence are clarified theoretically and experimentally. In the case of TE-polarization, the absorption of 20dB or more was obtained at the frequency between 9.1 and 10.5 GHz, and the incident angle between 0 and 40 degrees under the target frequency of 10GHz and the target incident angel of 20 degrees. In the case of TM-polarisation, on the other hand, the absorption of 20dB or more was also obtained at the frequency between 9.5 and 11.0 GHz, and the incident angle between 0 and 30 degrees. The optical transmittivities of our absorber of about 80 % or more was also obtained. © 2000 IEEE.
International conference proceedings, English

Design of a bandpass filter with multiple attenuation poles based on tapped resonators
K Wada; Awai, I
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E82C, 7, 1116-1122, Jul. 1999, Peer-reviwed, An intrinsic property of a tapped resonator is elucidated here, and a novel bandpass filter (BPF) with improved skirt characteristics based on a tapped half-wavelength resonator is proposed by this intrinsic property. "Tapping" for both I/O and interstage couplings of the resonator is the key concept here because a resulting open-ended resonator makes shunt open stubs which give anti-resonance near the center frequency. Multiple attenuation poles appear near the center frequency namely, close to, the passband. A BPF is designed on the basis of the general filter theory with a narrow band approximation. An experiment is carried out to confirm the concept by using a coplanar structure. The expected bandpass characteristics with multiple attenuation poles have been obtained by the novel BPF designed by the present concept.
Scientific journal, English

Heuristic models of half-wavelength resonator bandpass filter with attenuation poles
K. Wada; I. Awai
Electronics Letters, IEE, 35, 5, 401-402, 04 Mar. 1999, Peer-reviwed, Half-wavelength resonator bandpass filters (BPFs) with improved skirt characteristics are proposed in a heuristic manner. 'Tapping' for I/O and/or interstage coupling is the key concept here because the resulting half-wavelength open-ended resonators have open stubs which lead to anti-resonances near the resonant frequencies. Hence, transmission zeros appear near the resonant frequencies, i.e. the attenuation poles are created close to the passbands. Using this concept, excellent bandpass characteristics with multiple attenuation poles are obtained by using both I/O and interstage tap-coupling. The results of an experiment involving a coplanar structure are presented which confirm the concept.
Scientific journal, English

Heuristic Models of Half-Wavelength Resonator Bandpass Filter with Attenuation Poles
K.Wada; I.Awai
Electronics Letters, 4, 400-401, Mar. 1999, Peer-reviwed
Scientific journal, English

Characteristics of short-ended coplanar waveguide resonator with low spurious response and its application to a bandpass filter
K Wada; Y Iwamoto; Awai, I
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E82C, 1, 126-132, Jan. 1999, Peer-reviwed, Basic characteristics of a short-ended coplanar waveguide (CPW) resonator of good spurious suppression property is studied. The resonator is loaded with open tubs at its middle position and makes a fully planar structure. The length of the resonator is shortened almost by half and the first spurious resonance goes up to more than 3 times of the fundamental resonant frequency without degradation of unloaded Q(Q(0)) The origin and property of spurious response is thoroughly investigated to show the advantage and the limit of this configuration. The external Q(Q(e)) and fundamental resonant frequency of the resonator are also clarified theoretically and experimentally. Using those result, a bandpass filter (BPF) is designed on the basis of the narrow band approximation is realized and its transmission characteristics are examined theoretically and experimentally. The spurious suppression characteristics have been realized by the present filter in accordance with the expectation.
Scientific journal, English

A lambda/2 CPW resonator BPF with multiple attenuation poles and its miniaturization
K Wada; Awai, I
1999 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-4, IEEE, -, 1139-1142, 1999, Peer-reviwed, Very simple method for creating multiple attenuation poles of a bandpass filter (BPF) based on a lambda/2 coplanar waveguide (CPW) resonator with tap-coupling is proposed. Moreover, miniaturization of the CPW-BPF using a stepped impedance resonator (SIR) is also carried out, As a consequence, the bandpass characteristics with multiple attenuation poles are obtained together with the reduced filter size, The derivation of multiple attenuation poles and a method for reduced filter size are also detailed.
International conference proceedings, English

Quality Factors of Coplanar Waveguide Resonators
X.Wu; I.Awai; Z.Yan; K.Wada; T.Moriyoshi
Proc. of 1999 Asia-Pasific Microwave Conference Proceedings, Vol.3, No.3, 673-677, 1999, Peer-reviwed
International conference proceedings, English

A Study on Weatherability of the Millimeter-Wave Absorber Using Epoxy-Modified Urethane Rubber Mixed with Carbon Particles
Kouji Wada; Tetsu Soh; Osamu Hashimoto
Thailand-Japan Joint Symposium on Microwaves 1999 (TJMW'99), -, 123-128, 1999, Peer-reviwed
International conference proceedings, English

A New Concept of a Bandpass Filter with Transmission Zeros Based on Tap-Connected Half-Wavelength Resonator
K.Wada; I.Awai
Proceedings of 1998 Asia-Pacific Microwave Conference, vol.1, 89-92, Dec. 1998, Peer-reviwed
International conference proceedings, English

Reduction of Radiation Loss in a Coplanar Waveguide Resonator
K.Wada; N.Takayama; I.Awai
Proceedings of 1998 China-Japan Joint Meeting on Microwaves, 113-116, Aug. 1998, Peer-reviwed
International conference proceedings, English

A Short-Ended CPW Resonator with Low Spurious Response Its Application to a Bandpass Filter
K.Wada; Y.Iwamoto; I.Awai
Proceedings of 1998 China-Japan Joint Meeting on Microwaves, 117-120, Aug. 1998, Peer-reviwed
International conference proceedings, English

Basic characteristics of a quarter-wavelength CPW resonator with tap-feed structure and its application to a bandpass filter with attenuation poles
K Wada; Awai, I
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E81C, 6, 924-933, Jun. 1998, Peer-reviwed, Properties of a quarter-wavelength coplanar waveguide resonator such as resonant Frequency external quality factor (Q(e)) are characterized by a theoretical approach and verified by the experiment. The unloaded quality Factor (Q(0)) of the resonator is also examined experimentally. After new types of combline bandpass filter (BPF) made of these resonators are realized, their transmission and reflection characteristics are examined theoretically and experimentally. A new combline BPF having attenuation poles are also realized. A simple method to produce two-port equivalent circuit of these BPF is presented in this paper. The transmission characteristics including such as the control of attenuation poles of these filters are explained by the created equivalent circuit with the concept of even and odd modes. A new method of describing attenuation poles is established.
Scientific journal, English

Characteristics of lambda/4 CPW resonators with tap-excitation and their application to bandpass filters
K Wada; Awai, I; Y Yamashita
1997 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS I-III, I E E E, Vol.2, WE3D-6, 717-720, 1997, Peer-reviwed, The basic characteristics of lambda/4 coplanar waveguide (CPW) resonators are verified by a theoretical analysis using an improved equivalent circuit and a laboratory test. We propose new types of combline BPFs using these resonators and examine their transmission characteristics.
International conference proceedings, English

Microwave and Millimeter-wave Planar Filters Based on Coplanar Waveguide and Slot-Line
Y.Noguchi; K.Wada; I.Awai; J.Ishii
Proceedings of Progress in Electromagnetics Research Symposium, 239, 1997, Peer-reviwed
International conference proceedings, English

Realization of Tap-Feed λ/2 CPW Resonator BPF with Double Attenuation Poles
K.Wada; I.Awai
Proceedings of 1996 Asia-Pacific Microwave Conference, 1127-1131, Dec. 1996, Peer-reviwed
International conference proceedings, English

Novel Coplanar Waveguide Bandpass Filters with Wide Suppression Characteristics for Spurious Harmonic Responses
Y.Noguchi; K.Wada; I.Awai; J.Ishii
Proceedings of 1996 Asia-Pacific Microwave Conference, Vol.1, 65-68, Dec. 1996, Peer-reviwed
International conference proceedings, English

A New Type CPW-Resonator Bandpass Filter with Wide Suppression Characteristics of Harmonic Responses
Y.Noguchi; K.Wada; T.Nakamine
Proceedings of 1996 International Symposium on Signals Systems and Electronics, 234-240, Oct. 1996, Peer-reviwed
International conference proceedings, English

CPW/slotline bandpass filters with a low spurious response
Konji Wada; Ikuo Awai; Yasuo Iwamoto
1996 26th European Microwave Conference, EuMC 1996, IEEE Computer Society, 1, 422-426, 1996, Peer-reviwed, We propose new types of bandpass filters (BPFs) based on short-end coplanar waveguide (CPW)/slotline resonators and tap-feed configurations. We make comparison between the simulated and experimental results. By these results, the transmission characteristics of these BPFs are characterized. A method for suppressing spurious responses of these BPFs is also presented. © 1996 IEEE.
International conference proceedings, English

A Novel Method for Suppressing Spurious Resonance Responses of the Coaxial-Resonator Bandpass Filters
K.Wada; Y.Noguchi; H.Fujimoto; J.Ishii
Proceedings of USNC/URSI Radio Science Meeting, -, Jun. 1995, Peer-reviwed
International conference proceedings, English

TAPPED-FEED COMBLINE-TYPE COPLANAR WAVEGUIDE RESONATOR BANDPASS FILTERS
K WADA; Y NOGUCHI; E HIGASHINO; J ISHII
1995 IEEE MTT-S SYMPOSIUM ON TECHNOLOGIES FOR WIRELESS APPLICATIONS DIGEST, I E E E, 141-146, 1995, Peer-reviwed
International conference proceedings, English

Attenuation poles by tap-feed in mobile communication filters for intelligent simulation and design
J Ishii; K Murakami; Y Noguchi; K Wada
EUROSIM '95 SIMULATION CONGRESS, ELSEVIER SCIENCE PUBL B V, 577-582, 1995, Peer-reviwed
International conference proceedings, English

On Realizability of Interdigital Microwave Band-pass Filters with Lumped Capacitors
H.Fujimoto; K.Wada; Y.Noguchi
近畿大学理工学部紀要, Kinki University, Vol.31, 13-22, 1995, Peer-reviwed
Research institution, English

A Tapped-Line Coplanar Waveguide Bandpass Filters with Finite Attenuation Poles
K.Wada; Y.Noguchi; H.Fujimoto; J.Ishii
Proceedings of 1994 Asia-Pacific Microwave Conference, 763-766, Dec. 1994, Peer-reviwed
International conference proceedings, English

Tapped-Line Interdigital Bandpass Filters with Narrow Bandwidth Using Asymmetric Broadside Coupled Coplanar Waveguides
K.Wada; N.Otani; Y.Noguchi; J.Ishii
Proceeding of the 24th European Microwave Conference, 487-492, Sep. 1994, Peer-reviwed
International conference proceedings, English

Spurious Responses of g0/2 Coplanar Waveguide Resonator Bandpass Filters and a Method for Suppressing These Spurious Responses
Y.Noguchi; S.Kitazawa; Y.Takeda; K.Wada; J.Ishii
Proceedings of IV International Symposium on Recent Advances in Microwave Technology, 610-614, Dec. 1993, Peer-reviwed
International conference proceedings, English

Design of Transmission-Line Resonator Filters with Finite Poles,” Proceedings of IASTED International Symposium Computers
J. Ishii; K.Wada; K.Hirai; T.Asano
Proceedings of IASTED International Symposium Computers, 142-145, Apr. 1991, Peer-reviwed
International conference proceedings, English

学生とともに育った親（教員）と子供たち（フィルタ）
和田光司; 小野
Jul. 2019, 電子情報通信学会エレクトロニクスソサイエティNews Letter, no.174, 19-19, Japanese, Report scientific journal

一端短絡・他端開放共振器を用いたチップレスRFIDタグの検討
佐川守一; 牧本三夫; 小野哲; 酒井文則; 和田光司
2018, 電子情報通信学会大会講演論文集(CD-ROM), 2018, 1349-144X, 201802210967352386

Frequency Tunable BPF Using High Frequency Switch and Varactor diode-loaded Resonators with Attenuation Poles and Varactor diode-loaded m-type Admittance Inverters
辻 蒼一; 小野 哲; 和田 光司
電子情報通信学会, 26 Jan. 2017, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 422, 61-64, Japanese, 0913-5685, 40021099578

Stepped Impedance Resonator Based Tunable Combline Bandpass Filter with Wide Tuning Range of Center Frequency by Single DC Power Supply
阿部 励; 大塚 喬太; 小野 哲; 和田 光司
電子情報通信学会, 26 Jan. 2017, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 422, 57-60, Japanese, 0913-5685, 40021099576

A dual-band BPF using SAW resonator-loaded microstrip line resonators
張 原論; 小野 哲; 和田 光司
電子情報通信学会, 26 Jan. 2017, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 422, 65-68, Japanese, 0913-5685, 40021101359

A compact LTCC-based high-band UWB BPF composed of LPF and HPF using coupled lines
末崎 裕己; 小野 哲; 和田 光司
電子情報通信学会, 15 Dec. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 363, 153-158, Japanese, 0913-5685, 40021059678, AN10013185

A Compact Microstrip Rat-race Balun Fiter With Interdigital Coupled Lines
中村 流星; 小野 哲; 和田 光司
電子情報通信学会, 15 Dec. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 363, 147-152, Japanese, 0913-5685, 40021059650, AN10013185

A Frequency Controllable BPF Using m Type Admittance Inverters
辻 蒼一; 小野 哲; 和田 光司
電子情報通信学会, 15 Dec. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 363, 171-176, Japanese, 0913-5685, 40021059758, AN10013185

共有共振器とλg/4ステップインピーダンス共振器を用いた有極形ダイプレクサ (マイクロ波)
足立 一希; 小野 哲; 和田 光司
電子情報通信学会, 15 Dec. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 363, 183-188, Japanese, 0913-5685, 40021059797, AN10013185

A Compact BPF with Attenuation Poles Based on CRLH Transmission Line Resonators Using Chip Capacitors and Microstrip Lines
双石 文彦; 小野 哲; 和田 光司
電子情報通信学会, 15 Dec. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 363, 159-164, Japanese, 0913-5685, 40021059708, AN10013185

A Miniaturized Microstrip Line Rat-race Balun Filter With Combline Type Coupled Lines
中村 流星; 小野 哲; 和田 光司
電子情報通信学会, 17 Nov. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 310, 57-62, Japanese, 0913-5685, 40021033067, AN10013185

A Compact Tunable Bandpass Filter Using a Triple-mode Resonator Consisting of Lumped Elements and Varactor Diodes
大塚 喬太; 小野 哲; 和田 光司
電子情報通信学会, 17 Nov. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 310, 63-68, Japanese, 0913-5685, 40021033086, AN10013185

Realization of a super compact 2 GHz band BPF based on microstrip lines and chip capacitors by using a PCB prototyping machine
川俣 雅寿; 和田 光司
電子情報通信学会, 02 Mar. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 115, 476, 107-112, Japanese, 0913-5685, 40020790746, AN10013185

A Study of Multi-band Bandpass Filters with Attenuation Poles Based on CRLH Transmission Line Resonators Using Distributed Constant Lines and Lumped Elements
双石 文彦; 川俣 雅寿; 和田 光司
電子情報通信学会, 17 Dec. 2015, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 115, 372, 93-98, Japanese, 0913-5685, 40020701659, AN10013185

Bandpass Filter Using Dual-mode Hairpin Resonators and Its Application to Frequency Quadruplexer with Adjacent Passbands
谷井 宏成; 和田 光司; 大野 貴信
電子情報通信学会, 28 May 2015, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 115, 66, 19-24, Japanese, 0913-5685, 40020491218, AN10013185

A study of a miniaturized microstrip line BPF with attenuation poles using tunable coupled-line resonators
KAWAMATA Masatoshi; WADA Koji
In this study, we first propose a tunable coupled-line resonator and examine its resonant frequency for the line length and capacitance by using four-port coupled-line formula. The proposed resonator is realized by microstrip line structure, and frequency characteristics are simulated of the resonator with electromagnetic simulation. For designing the tunable microstrip line bandpass filter(BPF), the resonator's external Q and coupling coefficient between resonators are calculated. Finally, we try to fabricate the tunable BPF by using varactor diode and confirm its tunable frequency characteristics., The Institute of Electronics, Information and Communication Engineers, 18 Dec. 2014, IEICE technical report. Microwaves, 114, 376, 1-6, Japanese, 0913-5685, 110009977353, AN10013185

A study of a microstrip line resonator composed of a capacitor-loaded coupled line and its application to miniaturized BPF with attenuation poles
KAWAMATA Masatoshi; FUKUNAGA Takanori; WADA Koji
In this study, we first examine the resonant frequencies and attenuation poles of a resonator which consists of an open-circuited stub and a capacitor-loaded stub by using a circuit simulator. Secondly, a new coupled-line resonator which combined of an another resonator with the resonator mentioned above is proposed. Basic characteristics of the proposed coupled-line resonator are verified by a circuit simulator and an electromagnetic simulator. In order to keep away high order resonance frequencies, the stepped impedance configuration is applied to the coupled-line resonator. Moreover, we examine a straight microstrip line resonator bandpass filter which has arranged coupled-line stepped impedance resonators in parallel. We also comfirm by electromagnetic simulation and experiment that the miniaturization of the straight type bandpass filter is possible, maintaining the attenuation poles at both sides of the passband by applying a bandpass filter based on spiral microstrip coupled-line resonators., The Institute of Electronics, Information and Communication Engineers, 22 May 2014, IEICE technical report. Microwaves, 114, 45, 31-36, Japanese, 0913-5685, 110009903048, AN10013185

A Study of an LTCC-based Miniaturized Multiplexer with Attenuation Poles Using a Multiband Resonator and SIRs
AOKI Daichi; WADA Koji; MURATA Ryuji; HARA Hirosi; EBIHARA Hitoshi; OSHIMA Shinpei
Multiband resonators composed of two stepped impedance resonators(SIRs) are fabricated in a low temperature co-fired ceramic(LTCC)substrate. Resonant characteristics of the presented resonator is examined by electromagnetic simulation. Moreover, a super miniaturized LTCC diplexer and triplexer are proposed, designed and simulated. Each circuit consists of the multiband resonator and SIRs. The proposed diplexer and triplexer are also examined by electromagnetic simulation., The Institute of Electronics, Information and Communication Engineers, 04 Mar. 2014, IEICE technical report. Microwaves, 113, 460, 101-106, Japanese, 0913-5685, 110009862107, AN10013185

Millimeter-wave CMOS Dual-band BPF with Attenuation Poles Using Open-circuited Spiral Resonators
YAMAGISHI Fumiya; TANII Kosei; SAGAWA Morikazu; MAKIMOTO Mitsuo; WADA Koji
In this study, we first present a millimeter-wave open-circuited spiral resonator, and its basic properties are examined by using an electromagnetic simulator. And then, a millimeter-wave CMOS bandpass filter(BPF) with attenuation poles is proposed by using the presented resonators. In addition, the characteristics of a dual spiral resonator which improved the open-circuited spiral resonator are examined by same approach of the first resonator. Moreover, a 60/120 GHz-band CMOS dual-band BPF using the dual spiral resonators. As a result, we have confirmed that the passband characteristics in 60/120 GHz-band and four attenuation poles near the passband are realized simultaneously., The Institute of Electronics, Information and Communication Engineers, 04 Mar. 2014, IEICE technical report. Microwaves, 113, 460, 107-112, Japanese, 0913-5685, 110009862108, AN10013185

C-2-90 A study on a design of lumped element matching circuits for a diplexer using planar BPFs
Oshima Shinpei; Oshima Tomonori; Wada Koji
The Institute of Electronics, Information and Communication Engineers, 04 Mar. 2014, Proceedings of the IEICE General Conference, 2014, 1, 120-120, Japanese, 110009829547, AN10471452

A Study on Chipless RFID Tags Using Multimode Stepped Impedance Resonators
牧本三夫; 酒井文則; 和田光司
2014, 電子情報通信学会技術研究報告, 114, 367(SRW2014 35-43), 0913-5685, 201502263208844938

C-2-78 Basic Study on Realization of Attenuation Polesby a Capacitor Loading Tapped-1st Orderλ/4 CRI,H Transmission Line Resonator
Kondou Shinya; Wada Koji
The Institute of Electronics, Information and Communication Engineers, 05 Mar. 2013, Proceedings of the IEICE General Conference, 2013, 1, 109-109, Japanese, 110009738551, AN10471452

最近のマイクロ波フィルター技術－広帯域フィルターとその分波回路への応用－
和田光司
Dec. 2012, 島田理化技報, No.22, 2-8, Japanese, Peer-reviwed, Introduction other

A Study of an LTCC Substrate-Based Diplexer with Attenuation Poles Using BPFs Consisting of Tapped-1st Order CRLH
IWAMOTO Kentaro; HARA Hiroshi; OSHIMA Shinpei; MURATA Ryuji; EBIHARA Hitoshi; WADA Koji
Bandpass filters (BPFs) using tapped -1st order composit right/left-handed (CRLH) transmission line resonators are proposed. The proposed BPFs fabricated in the low temperature co-fired ceramic (LTCC) substrate are examined by electromagnetic simulator. In addition, the transmission characteristics and isolation characteristics of a diplexer using the BPFs fabricated in the LTCC substrate are examined. As a result, we have confirmed by the simulation that the diplexer-based characteristics with attenuation poles are obtained., The Institute of Electronics, Information and Communication Engineers, 11 Oct. 2012, IEICE technical report. Microwaves, 112, 251, 13-18, Japanese, 0913-5685, 110009637074, AN10013185

A study of millmeter-wave CMOS bandpass filter using resonators which connected ring to both ends of transmission line
YAMAGISHI Fumiya; TANII Morikazu; SAGAWA Morikazu; MAKIMOTO Mitsuo; WADA Koji
We propose a millimeter-wave CMOS resonator which connected the ring to the both ends of the transmission line. About 1st resonant frequency and harmonic resonant frequencies, comparative examination between uniform impedance resonator, stepped-impedance resonator and proposed resonator is carried out. We propose a new miniaturized resonator which constituted another ring inside the ring in the proposed resonator. And then, a bandpass filter using the miniaturized resonators is also examined. As a result, we have confirmed by simulation that the transmission characteristics with two attenuation poles are realized near the passband., The Institute of Electronics, Information and Communication Engineers, 11 Oct. 2012, IEICE technical report. Microwaves, 112, 251, 35-39, Japanese, 0913-5685, 110009637078, AN10013185

High Attenuation Wide-band BPF and Diplexer using Inter-digital Coupled line and Transmission Line with Grounded Via
TANII Kosei; WADA Koji
The wideband resonator composed by inter-digital coupled line and transmission line with grounded via is proposed. The characteristics of the wideband bandpass filter (BPF) consisting of the proposed resonators are calculated by both circuit and electromagnetic simulators. Furthermore, we apply the two wideband BPFs to wideband diplexer, and it is found that the proposed BPF is suitable to realize wideband diplexer by the simulations., The Institute of Electronics, Information and Communication Engineers, 11 Oct. 2012, IEICE technical report. Microwaves, 112, 251, 19-24, Japanese, 0913-5685, 110009637075, AN10013185

C-15-2 A study on transmission characteristics of CMOS-technology-based millimeter-wave LPF/HPF/BPF composed of coupled-line and transmission line by using electromagnetic simulator
Tanii K.; Makimoto M.; Igarashi S.; Fukui K.; Kobinata K.; Wada K.
The Institute of Electronics, Information and Communication Engineers, 06 Mar. 2012, Proceedings of the IEICE General Conference, 2012, 1, 309-309, Japanese, 110009460147, AN10471452

A study of CMOS-technology-based millimeterwave LPF/HPF/BPF with transmission zeros by using coupled-line and transmission line
TANII Kosei; MAKIMOTO Mitsuo; IGARASHI Sadao; FUKUI Kuniaki; KOBINATA Kouichi; WADA Koji
In this study, the conditions for realizing transmission zeros of millimeter-wave LPF/HPF using coupled line and transmission line are found by using of even and odd modes analysis. Moreover, a 77GHz BPF based on CMOS-thechnology is designed by using proposed LPF and HPF, and the BPF is simulated by circuit simulation and electromagnetic simulation., The Institute of Electronics, Information and Communication Engineers, 11 Jan. 2012, IEICE technical report. Electron devices, 111, 373, 13-18, Japanese, 0913-5685, 110009480974, AN10012954

A Study of LTCC Substrate-Based BPFs with Attenuation Poles by Using CRLH Transmission Line Resonators
IWAMOTO Kentaro; SASANAMI Yusaku; MITYATA Naoki; OSHIMA Shinpei; MURATA Ryuji; EBIHARA Hitoshi; WADA Koji
Composite right/left-handed transmission line resonators based on element-loading, the tap-coupling method and the use of the -1st order resonance mode are proposed. In addition, bandpass filters fabricated in the LTCC substrate by using the resonators are examined with a 3D electromagnetic simulator., The Institute of Electronics, Information and Communication Engineers, 13 Oct. 2011, IEICE technical report. Microwaves, 111, 250, 63-68, Japanese, 0913-5685, 110008900101, AN10013185

A Study of Diplexers Using a Balanced SAW Filter and a Balanced Wide-Band Filter Fabricated in an LTCC Substrate
KATSUMOTO Tatsuya; OSHIMA Shinpei; MURATA Ryuji; EBIHARA Hitoshi; KAWACHI Osamu; WADA Koji
Diplexers using a balanced wide-band filter fabricated in an LTCC substrate and a balanced SAW filter are proposed. The proposed diplexers are used for GPS/UWB applications and Bluetooth/UWB applications. In this study, The filters and diplexers are evaluated with commercial simulators., The Institute of Electronics, Information and Communication Engineers, 13 Oct. 2011, IEICE technical report. Microwaves, 111, 250, 57-62, Japanese, 0913-5685, 110008900100, AN10013185

C-2-48 Diplexer Using Balanced SAW Filter and Balanced Wide-Band Filter Fabricated in LTCC Substrate
Katsumoto T.; Oshima S.; Murata R.; Ebihara H.; Wada K.
The Institute of Electronics, Information and Communication Engineers, 30 Aug. 2011, Proceedings of the Society Conference of IEICE, 2011, 1, 72-72, Japanese, 110008730594, AN10489017

C-2-121 A method to realize a compact quintplexer using SAW filters and an LTCC substrate
Oshima Shinpei; Wada Koji; Murata Ryuji; Ebihara Hitoshi; Kaneko Hiroomi; Moriya Akira
The Institute of Electronics, Information and Communication Engineers, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1, 159-159, Japanese, 110008508425, AN10471452

C-2-119 Diplexer Based on Small-sized UWB Filter Using Open Ring Resonators in LTCC Substrate and SAW Filter
Iguchi S.; Katsumoto T.; Oshima S.; Murata R.; Ebihara H.; Wada K.
The Institute of Electronics, Information and Communication Engineers, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1, 157-157, Japanese, 110008508423, AN10471452

C-2-115 A study of a wide-band microstrip-line BPF using a λ/4 resonator-coupled open-circuited stub and multiconductor coupled-lines
Shimizu Yasutaka; Murata Ryuji; Oshima Shinpei; Shimakata Yukihiro; Wada Koji
The Institute of Electronics, Information and Communication Engineers, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1, 153-153, Japanese, 110008508419, AN10471452

C-2-120 A Study of an LTCC-based Triplexer Using Balanced Filters with Attenuation Poles
Hayama Michiya; Murata Ryuji; Oshima Shinpei; Ebihara Hitoshi; Wada Koji
The Institute of Electronics, Information and Communication Engineers, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1, 158-158, Japanese, 110008508424, AN10471452

C-2-118 A Study of a Diplexer Using Wide-band BPFs with Attenuation Poles by Three-Conductor Coupled-Lines in an LTCC Substrate
Saitou Mitsuo; Murata Ryuji; Oshima Shinpei; Ebihara Hitoshi; Wada Koji
The Institute of Electronics, Information and Communication Engineers, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1, 156-156, Japanese, 110008508422, AN10471452

A study on a compact quintplexer using SAW filters and an LTCC substrate
OSHIMA Shinpei; WADA Koji; MURATA Ryuji; EBIHARA Hitoshi; KANEKO Hiroomi; MORIYA Akira; KAWACHI Osamu
In this report, we propose a compact quintplexer using SAW filters and an LTCC substrate. The effectiveness of this method is verified by experiments., The Institute of Electronics, Information and Communication Engineers, 24 Feb. 2011, IEICE technical report, 110, 447, 27-32, Japanese, 0913-5685, 110008689257, AN10013185

A Microstrip-Line Multiplexer Using Wideband BPFs by λ/4 Resonator-Coupled Open-Circuited Stubs and a Lowpass Filter
SHIMIZU Yasutaka; MURATA Ryuji; OSHIMA Shinpei; SHIMAKATA Yukihiro; WADA Koji
In this paper, we propose a microstrip-line triplexer using wideband bandpass filters by using λ/4 resonator-coupled open-circuited stubs and a lowpass filter. The bandpass filters create wide bandpass responses and an attenuation pole located at the both sides of the passband. The lowpass filter creates lowpass responses with attenuation poles. By simulation and experiment, we have confirmed that the proposed triplexer provides one lowpass response for Bluetooth band and two wideband bandpass responses for low/high band specifications of the UWB., The Institute of Electronics, Information and Communication Engineers, 09 Dec. 2010, IEICE technical report, 110, 343, 63-68, Japanese, 0913-5685, 110008676285, AN10013185

Multiplexers for RF Module Using Wide-band Filter in LTCC Substrate and SAW Filter
KATSUMOTO Tatsuya; OSHIMA Shinpei; MURATA Ryuji; EBIHARA Hitoshi; WADA Kouji
Multiplexers using a wide-band filter fabricated in LTCC substrate and SAW filters are proposed. The proposed multiplexers are used for UWB/GPS and UWB/GPS/Bluetooth applications. The filter and multiplexers are evaluated with commercial simulators., The Institute of Electronics, Information and Communication Engineers, 02 Sep. 2010, IEICE technical report, 110, 197, 49-53, Japanese, 0913-5685, 110008107007, AN10013185

A Study of an LTCC based Diplexer Using Balanced Filters with Attenuation Poles
HAYAMA Michiya; MURATA Ryuji; OSHIMA Shinpei; EBIHARA Hitoshi; WADA Kouji
We first propose a new balanced filter with attenuation poles using coupled-lines. A diplexer using the filters is also presented because the proposed structure can be applied to a different frequency band. In this study, we assume that the realization of the proposed circuits are fabricated in LTCC technologies. The characteristics of the LTCC-based filters and diplexer are simulated using electromagnetic and circuit simulators., The Institute of Electronics, Information and Communication Engineers, 02 Sep. 2010, IEICE technical report, 110, 197, 43-47, Japanese, 0913-5685, 110008107006, AN10013185

C-2-81 Miniaturization for a wideband filter in an LTCC substrate using spiral resonators
Oshima Shinpei; Wada Kouji; Murata Ryuji; Shimakata Yukihiro
The Institute of Electronics, Information and Communication Engineers, 02 Mar. 2010, Proceedings of the IEICE General Conference, 2010, 1, 124-124, Japanese, 110007871039, AN10471452

C-2-45 A Basic Study of a Wireless LAN Diplexer using an LPF and a HPF
Shimazaki Tomohiro; Oshima Shinpei; Murata Ryuji; Shimakata Yukihiro; Wada Kouji
The Institute of Electronics, Information and Communication Engineers, 01 Sep. 2009, Proceedings of the Society Conference of IEICE, 2009, 1, 73-73, Japanese, 110007871353, AN10489017

C-2-59 A Study of a Multilayered Balanced Filter using a Balun with Open-Circuited Stubs and a Coupled-Line with Capacitors
Hayama Michiya; Murata Ryuji; Oshima Shinpei; Shimakata Yukihiro; Wada Kouji
The Institute of Electronics, Information and Communication Engineers, 01 Sep. 2009, Proceedings of the Society Conference of IEICE, 2009, 1, 87-87, Japanese, 110007871367, AN10489017

CS-2-6 A wideband triplexer using LTCC technology for UWB applications
Oshima Shinpei; Wada Kouji; Murata Ryuji; Shimakata Yukihiro
The Institute of Electronics, Information and Communication Engineers, 2009, Proceedings of the Society Conference of IEICE, "S-21", Japanese, 110007871565, AN10489017

C-2-72 A Study of a Diplexer for a BPF Using Coupled-lines for Control of Attenuation Poles and an LPF
Shimizu Yasutaka; Murata Ryuji; Oshima Shinpei; Shimakata Yukihiro; Wada Kouji
The Institute of Electronics, Information and Communication Engineers, 02 Sep. 2008, Proceedings of the Society Conference of IEICE, 2008, 1, 97-97, Japanese, 110007100968, AN10489017

C-2-70 Dual Band Filter with Wide Passband for Internal LTCC Substrate
Oshima Shinpei; Wada Kouji; Murata Ryuji; Shimakata Yukihiro
The Institute of Electronics, Information and Communication Engineers, 02 Sep. 2008, Proceedings of the Society Conference of IEICE, 2008, 1, 95-95, Japanese, 110007100970, AN10489017

C-2-79 A Basic Study of a Multilayer Wide-band BPF using Distributed Tap-coupling Resonators
Satou Akira; Murata Ryuji; Oshima Shinpei; Shimakata Yukihiro; Wada Kouji
The Institute of Electronics, Information and Communication Engineers, 02 Sep. 2008, Proceedings of the Society Conference of IEICE, 2008, 1, 104-104, Japanese, 110007100961, AN10489017

C-2-78 A Study of a Wide-band Microstrip Line BPF By Using λ/4 Resonator Coupled Open-circuited Stubs
Shimizu Yasutaka; Murata Ryuji; Oshima Shinpei; Shimakata Yukihiro; Wada Kouji
The Institute of Electronics, Information and Communication Engineers, 02 Sep. 2008, Proceedings of the Society Conference of IEICE, 2008, 1, 103-103, Japanese, 110007100962, AN10489017

A Study of a Multilayer Wideband Bandpass Filter with Attenuation Poles Using Distributed Tap-Coupling Resonators
SATOU Akira; SHIMAKATA Yukihiro; MURATA Ryuji; OSHIMA Shinpei; WADA Kouji
In this study, transmission characteristics of bandpass filter (BPFs) using open-circuited end resonators are analytically examined for realizing the wide-band filter based on an LTCC. Firstly, basic characteristics of multi-layer strip-line resonators and their application to various BPFs are examined. Secondly, miniaturization of the proposed BPF is also carried out by using two layer configurations. We have confirmed that miniaturization of the BPF is achieved together with the realization of the wide-band characteristics with attenuation poles., The Institute of Electronics, Information and Communication Engineers, 22 Apr. 2008, IEICE technical report, 108, 12, 1-6, Japanese, 0913-5685, 110006874024, AN10012885

A Study of Compact Multilayer Diplexer in LTCC Substrate Using LPF with Multiple Attenuation Poles and Wideband BPF
OSHIMA Shinpei; WADA Kouji; MURATA Ryuji; SHIMAKATA Yukihiro
In this paper we propose a compact diplexer in LTCC substrate for UWB system and 2.4GHz wireless systems. Firstly, a wideband BPF for UWB system and an LPF with multiple attenuation poles for 2.4GHz wireless systems are described. Secondly, we design matching circuits of a common port to keep basic performance of both the BPF and the LPF. Thirdly, in accordance with the result of the study, we design a compact diplexer in LTCC substrate. Finally, we verify the effectiveness of proposed method by experiments., The Institute of Electronics, Information and Communication Engineers, 29 Feb. 2008, IEICE technical report, 107, 504, 73-78, Japanese, 0913-5685, 110006935831, AN10013185

A Study of Low Profile Multilayer Balun Using the Folded Structure of a λ/2 Strip Line
OSHIMA Shinpei; WADA Kouji; MURATA Ryuji; SHIMAKATA Yukihiro
In this report, a new compact multilayer balun in LTCC substrate is introduced. A conventional compact multilayer balun cannot realize thin structure with good performance. Because it requires a ground (GND) plane in middle layer to prevent unnecessary interference between strip lines. This balun realizes small and thin size with good performance to use new structure of a λ/2 strip line and an additional strip line. Also we verify effectiveness of this method through designing and prototyping a compact multilayer balun in LTCC substrate., The Institute of Electronics, Information and Communication Engineers, 09 Jan. 2008, IEICE technical report, 107, 420, 173-177, Japanese, 0913-5685, 110006613641, AN10012954

A Study of Low Profile Multilayer Balun Using the Folded Structure of a λ/2 Strip Line
OSHIMA Shinpei; WADA Kouji; MURATA Ryuji; SHIMAKATA Yukihiro
In this report, a new compact multilayer balun in LTCC substrate is introduced. A conventional compact multilayer balun cannot realize thin structure with good performance. Because it requires a ground (GND) plane in middle layer to prevent unnecessary interference between strip lines. This balun realizes small and thin size with good performance to use new structure of a λ/2 strip line and an additional strip line. Also we verify effectiveness of this method through designing and prototyping a compact multilayer balun in LTCC substrate., The Institute of Electronics, Information and Communication Engineers, 09 Jan. 2008, IEICE technical report, 107, 421, 173-177, Japanese, 0913-5685, 110006613687, AN10013185

C-2-69 A Basic Study of a Microstrip Line Dual-band Filter with Wide-band Characteristics
Tanii K.; Wada K.
The Institute of Electronics, Information and Communication Engineers, 2008, Proceedings of the Society Conference of IEICE, 94-94, Japanese, 110007100971, AN10489017

マイクロストリップ線路共振器を用いた小型広帯域BPF
西村太; 笹部孝司; 和田光司
松下電工R&D企画室, Dec. 2007, 松下電工技報, Vol.55, No.4, 4-10, Japanese, Peer-reviwed, Introduction other, 0285-5054, 40015803353, AN00232466

A Study of a Compact Multilayer Wideband Bandpass Filter Using Distributed Resonator Consisted of a Capacitor and Transmission Lines
OSHIMA Shinpei; MURATA Ryuji; SHIMAKATA Yukihiro; WADA Kouji
In this report, a new distributed resonator which improves bandwidth and is composed of a capacitor and transmission lines is introduced. Resonant characteristics and mechanism of the presented circuit are examined theoretically and by making an equivalent circuit. Also we verify effectiveness of this resonator through designing and prototyping a compact UWB bandpass filter., The Institute of Electronics, Information and Communication Engineers, 29 Aug. 2007, IEICE technical report, 107, 208, 7-12, Japanese, 0913-5685, 110006421152, AN10013185

C-2-79 A Study on Improving Filter Characteristics near the Passband of BPFs Using Branch-Stub Resonators
YASUZUMI Takenori; OHNO Takanobu; HASHIMOTO Osamu; WADA Kouji
The Institute of Electronics, Information and Communication Engineers, 07 Mar. 2007, Proceedings of the IEICE General Conference, 2007, 1, 112-112, Japanese, 110006451604, AN10471452

An Experimental Study of a Small-sized and Wide-band BPF Using Microstrip-line Resonators
TANII Kosei; NISHIMURA Futoshi; SASABE Koji; UENO Yoshiaki; WADA Kouji; IWASAKI Takashi
Recently, we proposed and examined bandpass filters(BPFs) using distributed tap-coupling open-ended λ/2 and λ/4 resonators. In this study, we try to realize a new compact BPF using distributed tap-coupling resonators based on microstrip-line structure. Transmission and reflection characteristics of the BPF are analyzed by electromagnetic(EM) simulator. As a result, we have confirmed that the wide-band characteristics with attenuation poles near both sides of the passband by EM simulation results and experiment., The Institute of Electronics, Information and Communication Engineers, 02 Mar. 2007, IEICE technical report, 106, 560, 23-26, Japanese, 0913-5685, 110006277665, AN10013185

An Experimental Study of Various Wide-band BPFs using Distributed Tap-coupling Resonators
TANII Kosei; NISHIMURA Futoshi; SASABE Koji; UENO Yoshiaki; WADA Kouji; IWASAKI Takashi
In this paper, basic characteristics of distributed tap-coupling resonators such as open-ended λ/2 type, short-ended λ/2 type and λ/4 type are examined by electromagnetic(EM) simulator and circuit simulator. And then, transmission and reflection characteristics of five type bandpass filters(BPFs) using proposed resonators are examined theoretically and experimentally. As a result, the wide-band characteristics with attenuation poles are easily obtained., The Institute of Electronics, Information and Communication Engineers, 02 Mar. 2007, IEICE technical report, 106, 560, 15-22, Japanese, 0913-5685, 110006277664, AN10013185

A Fundamental Study on Improving Near the Passand Characteristics of BPFs Using Branch-Stub Resonators
YASUZUMI Takenori; OHNO Takanobu; HASHIMOTO Osamu; WADA Kouji
In this study, branch-stub resonators are designed by genetic algorithm. Through the calculation of the resonator, fundamental characteristics including the control of attenuation poles are examined. After that BPFs using the branch-stub resonators are also designed and calculated. As a result, it is confirmed that the attenuation poles are possible to control independently near the passband. Moreover, the results shows that the BPFs achieved very sharp skirt characteristics by setting the attenuation poles very near the passband., The Institute of Electronics, Information and Communication Engineers, 10 Jan. 2007, IEICE technical report, 106, 459, 51-56, Japanese, 0913-5685, 110006205159, AN10012954

CS-2-5 A Study of a Microstrip Line Diplexer Using a Wide-band BPF and an LPF
Shimizu Y.; Murata R.; Oshima S.; Shimakata Y.; Wada K.; Iwasaki T.
The Institute of Electronics, Information and Communication Engineers, 2007, Proceedings of the Society Conference of IEICE, "S-54"-"S-55", Japanese, 110006630049, AN10489017

A Study on Control of Band Characteristics for Wide-BPFs of MSL Loaded with Stubs and Dielectric Rods Periodically
MINE Hidenori; HASHIMOTO Osamu; WADA Kouji; TAKAHASHI Takeshi
In this study, a new microstrip line (MSL) with periodic dielectric rods and stubs inside the dielectric substrate are proposed and investigated because of applying its wide-bandstop characteristics to the microwave filter by using LTCC techniques. The proposed models are analyzed by the FDTD method, and it is confirmed that the wide-bandpass characteristic of the proposed filters can be controlled by the shape of periodic dielectric rods and stub circuits mutually functioning on MSL. Furthermore, we have designed and experimented on Wide-BPF with the satisfactory performance of UWB system., The Institute of Electronics, Information and Communication Engineers, 19 Oct. 2006, IEICE technical report, 106, 323, 123-128, Japanese, 0913-5685, 110004851601, AN10013185

CS-2-4 Size-Reduction of a Wide-band BPF Using Distributed Tap-Coupling Microstrip-Line Resonators
Nishimura F.; Tanii K.; Sasabe K.; ueno Y.; Wada K.; Iwasaki T.
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2006, Proceedings of the Society Conference of IEICE, 2006, 1, "S-22"-"S-23", Japanese, 110006215013, AN10489017

C-2-73 A Fundamental Study on a Quadplexer Consisting of Bandpass Filters Using Tapped Resonators
OHNO Takanobu; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2006, Proceedings of the Society Conference of IEICE, 2006, 1, 92-92, Japanese, 110006214836, AN10489017

C-2-70 A Study of a UWB-BPF using Distributed Tap-Coupling Resonators
Tanii K.; Wada K.; Nishimura F.; Sasabe K.; Ueno Y.; Iwasaki T.
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2006, Proceedings of the Society Conference of IEICE, 2006, 1, 89-89, Japanese, 110006214833, AN10489017

C-2-72 A Study on Wideband Characteristics of MSL-BPFs Consisting of Series and Parallel Resonators Using Quasi-Lumped Elements
OHNO Takanobu; OHNO Yuji; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2006, Proceedings of the Society Conference of IEICE, 2006, 1, 91-91, Japanese, 110006214835, AN10489017

C-2-81 A Fundamental Study on a Design of a Branch Stub-Based Resonator
OHNO Takanobu; YASUZUMI Takenori; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2006, Proceedings of the Society Conference of IEICE, 2006, 1, 100-100, Japanese, 110006214844, AN10489017

C-2-74 An Experimental Study on Tunable BPFs Using Tapped λ/4 Resonators
OHNO Takanobu; OMATA Kouji; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2006, Proceedings of the Society Conference of IEICE, 2006, 1, 93-93, Japanese, 110006214837, AN10489017

Fundamental Performance of BPFs Using λ/4 CPW Resonators Loaded with Inductor and Application to Tunable Filter
OMATA Kouji; OHNO Takanobu; WADA Kouji; HASHIMOTO Osamu
In this study, a resonator and a bandpass filter using tapped λ/4 resonators loaded with an inductor are examined. As a result, it is confirmed that the center frequency and attenuation poles are shifted by changing the inductance of the loaded inductor theoretically and experimentally. Next, it is confirmed that the elements using a variable capacitor have an inductance characteristic. Then, the BPF using the elements above was fabricated and measured. The results showed that the BPF achieved more than 30% tunability for the center frequency., The Institute of Electronics, Information and Communication Engineers, 29 Aug. 2006, IEICE technical report, 106, 231, 63-68, Japanese, 0913-5685, 110004823624, AN10013185

An Experimental Study on BPFs Using Tapped λ/4 Resonators Loaded with Inductor
OHNO Takanobu; OMATA Kouji; WADA Kouji; HASHIMOTO Osamu
In this study, the bandpass filters using tapped λ/4 resonators loaded with an inductor are examined. As a result, it is confirmed that the center frequency and attenuation poles are shifted by changing the inductance of the loaded inductor theoretically and experimentally. Moreover, the good tunable characteristics can be obtained when variable inductors are used., The Institute of Electronics, Information and Communication Engineers, 20 Jun. 2006, IEICE technical report, 106, 129, 23-28, Japanese, 0913-5685, 110004776183, AN10013185

C-2-60 An Experimental Study of a Wide-band MSL Resonator BPFs with Attenuation Poles
Nishimura F.; Tanii K.; Sasabe K.; ueno Y.; Wada K.; Iwasaki T.
The Institute of Electronics, Information and Communication Engineers, 08 Mar. 2006, Proceedings of the IEICE General Conference, 2006, 1, 91-91, Japanese, 110006214492, AN10471452

An Experimental Study of Wide-band Microstrip Line BPFs with Attenuation Poles : Utilization of Distributed Tap-Coupling Resonators for Filter Structure
TANII Kosei; NISHIMURA Futoshi; SASABE Koji; UENO Yoshiaki; WADA Kouji; IWASAKI Takashi
Resonance characteristics of distributed tap-coupling open-ended/short-ended microstrip-line (MSL) resonators are examined by experimental apploach. Especially, we focus on location of attenuation poles realized by the presented resonators. Moreover, Three types of bandpass filters(BPFs) using them are also examined experimentally. The measured results show that practical attenuation pole is realized at lower and/or upper sides near the passband., The Institute of Electronics, Information and Communication Engineers, 13 Jan. 2006, IEICE technical report, 105, 525, 7-12, Japanese, 0913-5685, 110004084069, AN10013185

C-2-63 Size-Reduction of a UWB-BPF Using Distributed Tap-Coupling Resonators
Tanii K.; Nishimura F.; Sasabe K.; Ueno Y.; Wada K.; Iwasaki T.
The Institute of Electronics, Information and Communication Engineers, 2006, Proceedings of the IEICE General Conference, 94-94, Japanese, 110006214495, AN10471452

A Study on Improvement of Stop-band Characteristics for Wide-band BPFs Using Stub Resonators : Utilization of Different Stubs
Tanii Kosei; Nishimura Futoshi; Sasabe Koji; Ueno Yoshiaki; Wada Kouji; Iwasaki Takashi
Wide-band and finite pole characteristics are achieved by distributed tap-coupling resonators and bandpass filters(BPFs) using presented resonators. Moreover, multi-pole characteristics are achieved near the passband by skillfully combining these resonators used. However, some problems remained about the improvement of stop-band region in filter responses. The effects of the characteristic improvement of the high frequency region near the passband are theoretically examined by combining uniform impedance and radial stubs in the wide-band BPF configuration., The Institute of Electronics, Information and Communication Engineers, 13 Sep. 2005, IEICE technical report. Microwaves, 105, 272, 13-18, Japanese, 0913-5685, 110003225235, AN10013185

Wide Bandstop Characteristics of Periodic Dielectric Structures and Their Applications to a Microwave Filter
MINE Hidenori; HASHIMOTO Osamu; WADA Kouji; TAKAHASHI Takeshi
This study focuses on the improvement of wide-bandstop characteristics compared with previous performances when a new microstrip line (MSL) with periodic dielectric rods inside the dielectric substrate is used. Such improvement of the characteristics is carried out by inserting dielectric rods between the strip conductor and the ground plane with the permittivity that is lower than the dielectric rod in the substrate in LTCC techniques. The proposed models are analyzed by FDTD method and it is confirmed that variations of their transmission characteristics are dependent on the spacing between the dielectric rods and their shape. Furthermore, when the filtering function of periodic dielectric structures is applied to the microwave filter, a BPF with improved characteristics will be realized. That results show that the proposed BPF have the wide-bandpass characteristics and improved spurious responses with with satisfactory performance., The Institute of Electronics, Information and Communication Engineers, 12 Sep. 2005, IEICE technical report. Microwaves, 105, 271, 49-54, Japanese, 0913-5685, 110003225226, AN10013185

C-2-86 An Experimental Study on λ/4 Resonators Loaded with Parallel Inductors
OHNO Takanobu; OMATA Kouji; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2005, Proceedings of the Society Conference of IEICE, 2005, 1, 107-107, Japanese, 110004745897, AN10489017

C-2-68 An Experimental Study on Wide-Band MSL-BPF Using Quasi-Lumped Elements
OHNO Takanobu; OHNO Yuji; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2005, Proceedings of the Society Conference of IEICE, 2005, 1, 89-89, Japanese, 110004745879, AN10489017

C-2-72 A Fundamental Study on Low Spurious Responses by Various Resonators Based on Open-Stubs
OHNO Takanobu; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2005, Proceedings of the Society Conference of IEICE, 2005, 1, 93-93, Japanese, 110004745883, AN10489017

A Fundamental Study on Wide-Band Planar Resonators Using Quasi-Lumped Elements : Use of Gap Capacitor and High-Impedance Inductive Line
OHNO Takanobu; OHNO Yuji; WADA Kouji; HASHIMOTO Osamu
Microstrip quasi-lumped elements such as gap capacitor and high-impedance inductive line are analyzed by an electromagnetic field simulator. In addition, the microstrip resonators based on the simulated quasi-lumped elements are proposed and examined. As a result, the bandstop and wideband bandpass characteristics are obtained. Moreover, the resonance characteristics of the various quasi-lumped element resonators are described. After that, 2-stage bandpass filter (BPF) using the resonators above is also fabricated and analyzed. The results show that the wideband bandpass characteristics are realized., The Institute of Electronics, Information and Communication Engineers, 08 Jul. 2005, Technical report of IEICE. OPE, 105, 183, 65-70, Japanese, 0913-5685, 110003303807, AN10442691

Improvement of Out-of-band Characteristics by Wideband BPFs with Attenuation Poles
WADA Kouji; TANII Kosei; IWASAKI Takashi
In this study, we focus on a distributed-element loaded resonator for the wideband bandpass filter(BPF). Simulations of the proposed resonators are carried out for the control of bandwidth and attenuation poles near passband in filter characteristics. We also realize multiple attenuation poles at the lower side near pass-band under the use of LC parallel circuit. Moreover, improvement of the characteristics at the higher side near pass-band is achieved under the condition that the input reactance characteristics of the resonators are controlled., The Institute of Electronics, Information and Communication Engineers, 08 Jul. 2005, Technical report of IEICE. OPE, 105, 183, 47-52, Japanese, 0913-5685, 110003303804, AN10442691

C-2-106 A Modified Design of BPFs Using Tapped λ/2 MSL Resonators and High-Impedance Inductive Lines
OHNO Takanobu; WADA Kouji; OHNO Yuji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Mar. 2005, Proceedings of the IEICE General Conference, 2005, 1, 139-139, Japanese, 110004744435, AN10471452

C-2-84 An Experimental Study on Bandpass Filters Using L Tapped/C Tapped Tunable CPW Resonators
KIMPARA Masanori; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 2005, Proceedings of the Society Conference of IEICE, 105-105, Japanese, 110004745895, AN10489017

C-2-66 Transmission Characteristics of MSL Resonator BPFs for Full-Band UWB Specification
Tanii K.; Nishimura F.; Sasabe K.; Ueno Y.; Wada K.; Iwasaki T.
The Institute of Electronics, Information and Communication Engineers, 2005, Proceedings of the Society Conference of IEICE, 87-87, Japanese, 110004745877, AN10489017

C-2-67 Realization of Wide-Band Characteristics, Control of Bandwidth and Downsizing of Circuit Patterns by Microstrip-Line BPFs Using Mixed Resonators
Nishimura F.; Sasabe K.; Ueno Y.; Tanii K.; Wada K.; Iwasaki T.
The Institute of Electronics, Information and Communication Engineers, 2005, Proceedings of the Society Conference of IEICE, 88-88, Japanese, 110004745878, AN10489017

C-2-81 A Fundamental Study on MSL Resonators Based on Quasi-Lumped Elements
OHNO Takanobu; OHNO Yuji; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 2005, Proceedings of the IEICE General Conference, 114, 114-114, Japanese, 110004744410, AN10471452

A Planar Triplexer with Multiple Attenuation Poles
OHNO Takanobu; WADA Kouji; HASHIMOTO Osamu
本論文では,入出力及び段間結合にタップ結合を適用したλ/4共振器とλ/2共振器の組合せにより,減衰極の制御機能を有する帯域通過フィルタ(BPF)を構成し,その基本性能を積極的に生かしたトリプレクサについて検討を行った.更に,構成要素である各BPFと分岐線路の設計を確立し,その理論計算及び試作実験を行った.その結果,得られた多極特性の効果により,帯域外特性の改善及びアイソレーション特性の向上が確認され,比較的部品数の少ないプレーナ型トリプレクサを実現した., The Institute of Electronics, Information and Communication Engineers, 01 Dec. 2004, The IEICE transactions on electronics C, 87, 12, 1070-1078, Japanese, 1345-2827, 110003203605, AA11412446

Realization of Tunable Characteristics by Bandpass Filters Using Tapped λ/4 Resonators
SUZUKI Atsushi; WADA Kouji; HASHIMOTO Osamu
We first examine tapped λ/4 resonators with varactor for tunable characteristics of a resonant frequency and an attenuation pole. Moreover, we theoretically and experimentally propose a bandpass filter (BPF) using proposed λ/4 resonators and examine the location control of the center frequency and attenuation pole., The Institute of Electronics, Information and Communication Engineers, 25 Nov. 2004, IEICE technical report. Microwaves, 104, 462, 13-18, Japanese, 0913-5685, 110003206613, AN10013185

A Method to Realize Improved-Resonant Characteristics for Microstrip LTCC Resonators
WADA Kouji; POKHAREL R. K.; HASHIMOTO Osamu; TAKAHASHI Takeshi
In this study, theoretical investigations have been performed on a method to improve the resonant characteristics of both ends open-type half-wavelength (λ/2) microstrip line (MSL) resonators The improved characteristics have been achieved by inserting two dielectric rods between a strip conductor and the ground plane. Dielectric rods to be inserted have higher relative permittivity than that of the substrate. Therefore, it is suitable for fabrication by a Low-Temperature Cofired Ceramics (LTCC) technique. FDTD analysis shows that a tapped resonator employing the presented method is capable of realizing the improved spurious responses together with an attenuation pole in the stopband, and of reducing the resonator's length., The Institute of Electronics, Information and Communication Engineers, 29 Oct. 2004, IEICE technical report. Microwaves, 104, 385, 5-10, English, 0913-5685, 110003206596, AN10013185

A Basic Study of Wide-Band BPFs with Attenuation Poles
WADA Kouji; TANII Kosei; IWASAKI Takashi
We propose wide-band bandpass filters(BPFs) using half-wavelength resonators with distributed-line tapping. The proposed BPFs basically consists of open-ended half-wavelength resonators and short-ended half-wavelength resonators. In this study, we examine three types of BPFs Such as (1) open-ended half-wavelength resonator type, (2) short-end ed half-wavelength resonator type and (3) mixed resonators type., The Institute of Electronics, Information and Communication Engineers, 08 Sep. 2004, IEICE technical report. Microwaves, 104, 297, 1-4, Japanese, 0913-5685, 110003179779, AN10013185

A Study on a Coplanar Triplexer with Multiple Attenuation Poles
OHNO Takanobu; WADA Kouji; HASHIMOTO Osamu
In this study, we fabricated a BPF which had the function of the control of attenuation poles by combining tapped λ/4 resonator with tapped λ/2 resonator, and proposed a triplexer that positively used the basic performance of tapped resonators. In addition, the design of each BPF and the branch line of the triplexer was theoretically established and experimentally verified. As a result, the improvement of the out-of-band and isolation characterstics by the effect of the realized multiple attenuation poles was confirmed, and coplanar triplexer with a comparatively little number of parts was achieved., The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2004, IEICE technical report. Microwaves, 104, 296, 7-12, Japanese, 0913-5685, 110003179765, AN10013185

C-2-109 Design and Fabrication of Tunable BPFs Using λ/4 CPW Resonators with Attenuation Poles
SUZUKI Atsushi; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 08 Mar. 2004, Proceedings of the IEICE General Conference, 2004, 1, 144-144, Japanese, 110003262938, AN10471452

Design of BPF Using Loaded Element Tap-Coupled λ/4 SIRs
Wada Kouji; Kamiyama Tomohide; Hashimoto Osamu
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 123-123, Japanese, 110003320978, AN10489017

An Experimental Study of Transmission Characteristics of Three-dimensional Periodic Dielectric
Okimoto Koji; Suzuki Shinsuke; Wada Kouji; Takahashi Takeshi; Hashimoto Osamu
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 97-97, Japanese, 110003320952, AN10489017

A Study of a Triplexer Consisting of BPFs with a Function of Manipulating Attenuation Poles
OHNO Takanobu; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 126-126, Japanese, 110003320981, AN10489017

Location Control of Attenuation Poles by a BPF Using LC-Tap-Coupled λ/4 Resonators
Kamiyama Tomohide; Wada Kouji; Hashimoto Osamu
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 119-119, Japanese, 110003320974, AN10489017

A Basic Study on Tunability of Resonance Frequency and Attenuation Pole of λ/4 Resonators
WADA Kouji; SUZUKI Atsushi; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 125-125, Japanese, 110003320980, AN10489017

An Experimental Study of a Microstrip Line with Dielectric Rods Periodically inside Dielectric Substrate
Wada Kouji; Okimoto Koji; Suzuki Shinsuke; Hashimoto Osamu; Takahashi Takeshi
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 96-96, Japanese, 110003320951, AN10489017

Location of Attenuation Poles by Bandpass Filter Using Various λ/4 Resonators
WADA Kouji; TATSUMI Makoto; KAMIYAMA Tomohide; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 122-122, Japanese, 110003320977, AN10489017

Designs of 3-pole Bandpass Filters Using Short-Ended λ/2 Resonators and Their Applications to Duplexers
WADA Kouji; AIHARA Yoshiyuki; KAMIYAMA Tomohide; HASHIMOTO Osamu
This paper describes the location of multiple transmission zeros by tap-coupling technique for a bandpass filters (BPF) using short-ended λ/2 resonators and its application to a duplexer. Firstly, a method for locating the transmission zero by the short-ended λ/2 resonators is examined under the change of excitation methods. We herein focus on four types of the short-ended λ/2 resonators, i.e., an end-coupling type, a tap-coupling type, a capacitive tap-coupling type and an inductive tap-coupling type. Secondly, the BPFs based on the basic characteristics of respective resonators are proposed and designed by general filter theory with narrow band approximation. Lastly, we propose and design the new duplexers consisting of the proposed BPFs. The results lead us to the conclusion that the basic characteristics of the short-ended λ/2 resonators are useful for realizing the BPF with multiple transmission zeros and the high-performance duplexer fabricated without increasing the number of elements., The Institute of Electronics, Information and Communication Engineers, 31 Jul. 2003, Technical report of IEICE. OPE, 103, 240, 107-115, English, 0913-5685, 110003302417, AN10442691

A Duplexer Consisting of 2-Pole Bandpass Filters Using Mixed Tapped Resonators
OHNO Takanobu; WADA Kouji; HASHIMOTO Osamu
In this paper we describe the investigation of design methodology of a planar duplexer consisting of BPFs using mixed tapped resonators. Firstly, we propose the planar duplexer consisting of bandpass filters (BPFs) using a tapped open-ended λ/2 resonator and a tapped λ/4 resonator. The duplexer is designed based on the general filter theory with narrow band approximation and tap-coupling technique. The actual duplexer is fabricated using a coplanar waveguide (CPW). Secondly, downsizing of the planar duplexer is carried out based on the BPF using stepped impedance resonators (SIRs). Lastly, another type of duplexer consisting of different BPFs using mixed tapped resonators is investigated in the same manner. The results of this study lead us to the conclusion that the design methodology is useful for realizing the high-performance planar duplexer fabricated without increasing the number of elements., The Institute of Electronics, Information and Communication Engineers, 31 Jul. 2003, Technical report of IEICE. OPE, 103, 240, 117-124, English, 0913-5685, 110003302418, AN10442691

An Experimental Study on Out-of-Band Rejection of Open-Ended Microstrip Coupled-Line BPF
NAKAGAWA Kouichi; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 03 Mar. 2003, Proceedings of the IEICE General Conference, 2003, 1, 81-81, Japanese, 110003238402, AN10471452

Design of 3-pole BPF Based on Basic Characteristics of Short-Ended λ/2 Resonators
Aihara Y.; Wada K.; Kamiyama T.; Hashimoto O.
The Institute of Electronics, Information and Communication Engineers, 03 Mar. 2003, Proceedings of the IEICE General Conference, 2003, 1, 82-82, Japanese, 110003238403, AN10471452

An Experimental Study on Microstrip Line BPFs Using Coupled-line with Different Ends
WADA Kouji; AOKI Yoshihiro; OHNO Takanobu; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 03 Mar. 2003, Proceedings of the IEICE General Conference, 2003, 1, 123-123, Japanese, 110003238444, AN10471452

A Basic Study of Transmission Characteristics with Attenuation Poles for BPFs Using Coupled-line with Different Ends
WADA Kouji; AOKI Yoshihiro; OHNO Takanobu; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 03 Mar. 2003, Proceedings of the IEICE General Conference, 2003, 1, 122-122, Japanese, 110003238443, AN10471452

An Experimental Study on Realization of Attenuation Poles of Coplanar Type BPFs
Wada K.; Aihara Y.; Kamiyama T.; Tatsumi M.; Hashimoto O.
The Institute of Electronics, Information and Communication Engineers, 03 Mar. 2003, Proceedings of the IEICE General Conference, 2003, 1, "S-37"-"S-38", Japanese, 110003238692, AN10471452

A Study on Transimission Lines with the Periodic Dielectric Rods Located inside the Dielectric Substrate
OKIMOTO Koji; SUZUKI Shinsuke; WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 03 Mar. 2003, Proceedings of the IEICE General Conference, 2003, 1, "S-41"-"S-42", Japanese, 110003238694, AN10471452

An Effective Method for Designing Bandpass Filters Using λ/4 Resonators for Improving Out-of-Band Characteristics
WADA Kouji; KAMIYAMA Tomohide; HASHIMOTO Osamu
In this paper, we examine the basic characteristics of various λ/4 resonators for improving out-of-band characteristics of bandpass filters (BPFs). In this study, 3-pole BPF is composed by combined resonators above and is designed by using the general filter theory. As a result, it has been verified that the skirt characteristics and the spurious responses of the BPFs using λ/4 resonators have improved more effectively than before., The Institute of Electronics, Information and Communication Engineers, 11 Nov. 2002, IEICE technical report. Microwaves, 102, 457, 47-55, English, 0913-5685, 110003179160, AN10013185

An Empirical Study of a Bandpass Filter with Attenuation Poles Using Tapped Short-Ended λ/2 CPW Resonators
WADA Kouji; AIHARA Yoshiyuki; HASHIMOTO Osamu
Basic characteristics of a short-ended λ/2 resonator and their applications to bandpass filters(BPFs) made of a coplanar waveguide(CPW) are discussed. The first part of this paper gives the essence of the improvement of out-of-band characteristics of the BPF by basic characteristics of a tapped resonator. Secondly, a new BPF with attenuation pole using short-ended λ/2 CPW resonators above is proposed and realized. It is confirmed that our principle is useful for improving out-of-band characteristics of the BPF using the short-ended λ/2 CPW resonators without the complicated filter design., The Institute of Electronics, Information and Communication Engineers, 17 Oct. 2002, IEICE technical report. Electromagnetic compatibility, 102, 405, 53-58, English, 0913-5685, 110003202524, AN10013108

Basic Function of Different-Ended Coupled-Line and Its Application to Bandpass Filters
WADA Kouji; OHNO Takanobu; AOKI Yoshihiro; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 20 Aug. 2002, Proceedings of the Society Conference of IEICE, 2002, 1, 69-69, Japanese, 110003375914, AN10489017

Various λ/4 Resonators with Improved Resonance Responses and Their Applications to BPFs for Improving Out-of-Band Characteristics
WADA Kouji; KAMIYAMA Tomohide; HASHIMOTO Osamu
In this paper, improvement of resonance responses is carried out by the operation of the former proposed λ/4 resonator and the tapped λ/4 resonator. A new loaded-element tapped λ/4 resonator is also proposed and its resonance responses are examined. Moreover, various bandpass filters (BPFs) based on mixed λ/4 resonators are proposed. As a result, It has been verified that the skirt characteristics and the spurious responses of the λ/4 resonator BPFs are achieved on the basis of our proposal., The Institute of Electronics, Information and Communication Engineers, 12 Jun. 2002, Technical report of IEICE. OPE, 102, 125, 31-38, Japanese, 0913-5685, 110003302263, AN10442691

A Design of λ/4 Resonator BPFs for Improving Out-of-Band Characteristics
WADA Kouji; KAMIYAMA Tomohide; HASHIMOTO Osamu
07 Jun. 2002, 電気学会研究会資料. IM, 計測研究会, 2002, 25, 53-60, Japanese, 10024606682, AN00346727

A Method for Improving Out-of-Band Characteristics of a Coupled-Line Filter
WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 29 Aug. 2001, Proceedings of the Society Conference of IEICE, 2001, 1, 66-66, Japanese, 110003349672, AN10489017

Improvement Techniques of Transmission Characteristics by λ/4 Resonator BPFs
WADA Kouji; KAMIYAMA Tomohide; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 29 Aug. 2001, Proceedings of the Society Conference of IEICE, 2001, 1, 69-69, Japanese, 110003349675, AN10489017

Basic Property of Open-Ended λ/2 Resonator and Its Application to Filter
WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 07 Mar. 2000, Proceedings of the IEICE General Conference, 2000, 1, 153-153, Japanese, 110003236190, AN10471452

Mechanism of Operation for an Open-Ended Resonator and Its Application to a Micowave Filter
WADA Kouji; HASHIMOTO Osamu
The aim of this paper is to study the mechanism of operation for the various type open-ended resonator and its application to a microwave filter. Firstly, the reasonance property of the basic open-ended resonator and an intrinsic property of this resonator under the use of a tap-feed are discussed. The transmission zero can be obtained by the open-ended resonator with tap-feed without complex mechanism. In our study, mechanism of the operation for the resonator is elucidated based on the even- and odd-mode analysis of symmetrical circuits. Secondly, the basic property of the open-ended resonator with impedance step and loaded-element type resonator and their application to filter responses such as improvement of spurious responses and realization of the dual-band characteristics are studied theoretically here., The Institute of Electronics, Information and Communication Engineers, 17 Feb. 2000, IEICE technical report. Antennas and propagation, 99, 634, 15-22, English, 0913-5685, 110003249007, AN10060764

A Dual-Band Filter with Multiple Transmission Zeros
WADA Kouji; HASHIMOTO Osamu
The Institute of Electronics, Information and Communication Engineers, 2000, Proceedings of the IEICE General Conference, 152-152, Japanese, 110003236189, AN10471452

マイクロ波伝送線路共振器の構成と応用
牧本三夫; 佐川守一; 松尾道明; 和田光司
Scholarly book, Japanese, Joint work, 森北出版, Nov. 2014, 9784627743717

Ultra Wideband Communications: Novel Trends - System, Architecture and Implementation
Shinpei Oshima; Kouji Wada; Ryuji Murata; Yukihiro Shimakata
English, Joint work, Ａ Method for Improving Out-of-Band Characteristics of a Wideband Bandpass Filter in an LTCC Substrate, InTech, Jul. 2011

ミリ波技術の基礎
荒木純道; 大平孝; 河合正; 風間保裕; 川上憲司; 君島正幸; 九鬼孝夫; 栗原弘; 黒木; 太司; 古神義則; 近藤昭治; 真田篤志; 高橋和晃; 辻幹男; 中山正敏; 二川佳央; 西方敦博; 西川健二郎; 西野有; 橋本修; 半杭英二; 檜枝護重; 堀部雅弘; 丸橋健一; 水野晧司; 矢加部利幸; 李可人; 和田光司; 渡辺慎也
Japanese, Joint work, 5章回路技術5.1.2フィルタ5.1.4分波器, 電気学会, Jul. 2009

電気学会大学講座：電気電子応用計測
井出英人; 中根央; 小宮勤一; 岩崎俊; 佐藤宗純; 澤邊厚仁; 山田貴寿; 橋本修; 和田光司
Japanese, Joint work, 電気学会, Dec. 2003

MWE2024マイクロウェーブ展 大学展示
Poster presentation, MWE2024
27 Nov. 2024
27 Nov. 2024- 29 Nov. 2024

マイクロストリップ線路バンドパスフィルタのシールド製作に関する一検討
松浦弘樹; 塩竹明人; 和田光司
Oral presentation, 回路とシステム研究会
26 Nov. 2024
26 Nov. 2024- 27 Nov. 2024

スタブ装荷型リング共振器を用いた21GHz帯広帯域マイクロストリップ線路BPFの試作及び設計理論の一検討
塩竹明人; 松浦弘樹; 松木淳一郎; 和田光司
Oral presentation, 回路とシステム研究会
26 Nov. 2024
26 Nov. 2024- 27 Nov. 2024

マイクロ波平⾯フィルタの⼩型化
和田 光司
Invited oral presentation, 電波応用工学研究会
20 Aug. 2024
20 Aug. 2024- 20 Aug. 2024

スタブ装荷型共振器とT字型スタブを用いた21GHz帯広帯域マイクロストリップ線路バンドパスフィルタの試作
松浦弘樹; 嘉齋 尚; 和田光司
Oral presentation, 回路とシステム研究会
19 Jul. 2024
18 Jul. 2024- 19 Jul. 2024

結合線路共振器とリング共振器を用いたLTCC積層構造による平衡型BPFの設計に関する検討
谷井竜義; 松浦弘樹; 和田光司
Oral presentation, 回路とシステム研究会
19 Jul. 2024
18 Jul. 2024- 19 Jul. 2024

フレキシブル基板を用いたマイクロストリップ線路BPFにおける基板の湾曲効果
谷井宏成; 和田光司; 大野貴信; 小澤勇太
Poster presentation, 第38回エレクトロニクス実装学会春季講演大会
14 Mar. 2024
13 Mar. 2024- 15 Mar. 2024

恒温槽を用いた恒温恒湿試験によるマイクロストリップ線路及びチップ部品で構成した回路の特性測定に関する一検討
有本直矢; 和田光司
Poster presentation, 第38回エレクトロニクス実装学会春季講演大会
14 Mar. 2024
13 Mar. 2024- 15 Mar. 2024

2出力発振器を使用した簡易な回路による複素反射係数測定法
松浦弘樹; 和田光司
Oral presentation, 第38回エレクトロニクス実装学会春季講演大会
14 Mar. 2024
13 Mar. 2024- 15 Mar. 2024

遮断周波数を基準にしたチップ素子及び導体パターンのばらつきに強い高周波ダイプレクサの設計に関する一検討
中田祥太郎; 和田光司
Oral presentation, 回路とシステム研究会
25 Jan. 2024
25 Jan. 2024- 26 Jan. 2024

広帯域フィルタとその分波器への応用
和田 光司
Public discourse, MWE2023, Invited
29 Nov. 2023
29 Nov. 2023- 01 Dec. 2023

MWE2023マイクロウェーブ展 大学展示
Poster presentation, MWE2023
29 Nov. 2023- 01 Dec. 2023

A design method for miniaturized multiplexer based on a novel substrate integrated defect ground structure
Weiyu Zhou; Koji Wada; Kenichi Ohta
Oral presentation, マイクロ波研究会
18 May 2023
18 May 2023- 19 May 2023

DSPSL構造とリング共振器による広帯域通過特性を有する平衡型フィルタを用いたダイプレクサに関する一検討
佐藤雄介,和田光司
Poster presentation, Japanese, 第37回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会
15 Mar. 2023
15 Mar. 2023

左手系伝送線路と右手系伝送線路を用いたマイクロストリップ線路フィルタとその応用に関する一検討
谷井宏成,和田光司,大野貴信
Poster presentation, Japanese, 第37回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会
15 Mar. 2023
15 Mar. 2023

広帯域フィルタとその分波回路への応用
和田光司
Invited oral presentation, Japanese, マイクロ波研究会, Invited
03 Mar. 2023
03 Mar. 2023

リング共振器とインタディジタル結合を用いた21GHz帯広帯域マイクロストリップ線路バンドパスフィルタに関する検討
石村康大,和田光司,川口則幸
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）
27 Jan. 2023
27 Jan. 2023

2系統電源で中心周波数と通過帯域幅の可変なチューナブルLPFとチューナブルHPFで,構成されたチューナブルBPFに関する検討
谷内 渉,和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）
27 Jan. 2023
27 Jan. 2023

欠陥接地構造と抵抗装荷による広帯域な吸収型マイクロストリップ線路コモンモードフィルタに関する検討
成島章太,和田光司,肖 鳳超
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）
27 Jan. 2023
27 Jan. 2023

多層FSIW共振器の基本特性とその分波回路への応用に関する検討
大口宏人,和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）
27 Jan. 2023
27 Jan. 2023

高い中心周波数可変率を持つチューナブルBPFに関する研究,” 電子情報通信学会研究技術報告
塩竹明人,小野 哲,和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）
14 Sep. 2022
14 Sep. 2022

高い中心周波数可変率を持つチューナブルBPFに関する研究,” 電子情報通信学会研究技術報告, , , MW2022-69, (2022年9月）
塩竹明人; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）, Domestic conference
14 Sep. 2022
14 Sep. 2022

5分配かつ非等分配な1GHz帯Bagley Polygon型分配率可変ディバイダの設計に関する検討
神保雄祐; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会, Domestic conference
16 Mar. 2022

異種線路構造を用いた周波数離調比の高い小型積層DBPFの設計
髙橋拓海; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会, Domestic conference
15 Mar. 2022

チップキャパシタ結合型共有共振器を用いた小型ダイプレクサの検討
小野 哲; 和田光司
Invited oral presentation, Japanese, マイクロ波研究会, Domestic conference
27 Jan. 2022

飛越結合の影響及び共振周波数のずれを考慮したマイクロストリップBPFの高精度設計法に関する検討
梅本悠河; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）, Domestic conference
17 Dec. 2021

ストリップ線路構造によるブロードサイド及びオフセット結合線路を用いた3セクション型90度ハイブリッドの設計手法に関する検討
成田 剛; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(マイクロ波研究会）, Domestic conference
08 Oct. 2021

小型3 段マイクロストリップ線路BPF の設計・試作と高精度モデリングに関する一検討
宮腰就也; 小野 哲; 和田光司
Oral presentation, Japanese, 2021年電子情報通信学会ソサイエティ大会, Domestic conference
16 Sep. 2021

チップキャパシタ結合型共有共振器を用いた広い離調幅を持つ小型ダイプレクサの検討
小野 哲; 和田光司
Invited oral presentation, Japanese, 2021年電子情報通信学会ソサイエティ大会, Domestic conference
16 Sep. 2021

入学者選抜と入学後の進路選択―電気通信大学における括り入試の事例報告を中心に―
山路浩夫; 湯山加奈子; 三宅貴也; 中村裕樹; 和田光司
Oral presentation, Japanese, 令和３年度 全国大学入学者選抜研究連絡協議会大会（第16回）
22 May 2021

電気通信大学における出張講義の取り組み ―With/Afterコロナを見据えた高大接続―
三宅貴也; 大野裕子; 山路浩夫; 中村裕樹; 和田光司
Oral presentation, Japanese, 令和３年度 全国大学入学者選抜研究連絡協議会大会（第16回）
22 May 2021

⼩型，⾼集積，⾼周波数化時代に求められる平⾯フィルタ設計技術
小野 哲; 和田光司
Invited oral presentation, Japanese, 第21回ミリ波サブミリ波受信機ワークショップ
08 Mar. 2021

リング共振器を用いて構成したチップレスRFIDタグに関する検討
服部 健将; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
06 Mar. 2021

両端開放型マイクロストリップ線路共振器を用いたストリップ導体の実効導電率の導出手法の検討
髙橋 徹; 小野 哲; 和田光司
Oral presentation, Japanese, 第30回 マイクロエレクトロニクスシンポジウム, エレクトロニクス実装学会, Domestic conference
18 Sep. 2020

Design of Via Connection Coupling Structure Based Balun and Its Application to Balun filter
易 龍飛; 小野 哲; 和田光司
Oral presentation, English, 超高速・高周波ｴﾚｸﾄﾛﾆｸｽ実装研究会 二年度第1回公開研究会, Domestic conference
27 Aug. 2020

BPF構成を用いたチップレスRFIDタグの検討
佐川守一; 牧本三夫; 小野 哲; 和田光司
Oral presentation, Japanese, 電気学会全国大会
11 Mar. 2020

チップ素子とパターン素子を用いた小型デュアルバンドフィルタの設計
松村 太郎; 小野 哲; 和田光司
Oral presentation, Japanese, 第34回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会, Domestic conference
03 Mar. 2020

金属シールド及びステップインピーダンス共振器を用いたグラウンド付きコプレーナ線路で構成された28GHz帯BPF
中嶋 将基; 小野 哲; 和田光司
Oral presentation, Japanese, 第34回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会, Domestic conference
03 Mar. 2020

インクジェットプリンタの使用を想定した平面フィルタの調整技術
村上 浩太郎; 小野 哲; 和田光司
Oral presentation, Japanese, 第34回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会, Domestic conference
03 Mar. 2020

分配率及び動作周波数可変特性を有する1 GHz 帯Gysel Power Dividerに関する検討
村山 豊; 小野 哲; 和田光司
Oral presentation, Japanese, 第34回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会, Domestic conference
03 Mar. 2020

手作業での試作容易な線路の折り曲げ箇所が少ない2GHz帯マイクロストリップ線路WPDに関する検討
内田 雄吾; 村山 豊; 周 威宇; 小野 哲; 和田光司
Oral presentation, Japanese, 第34回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会, Domestic conference
03 Mar. 2020

手作業による試作が容易かつ低挿入損失な2GHz帯折り曲げ型マイクロストリップ線路WPDに関する検討
神保 雄祐; 村上 浩太郎; 小野 哲; 和田光司
Oral presentation, Japanese, 第34回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会, Domestic conference
03 Mar. 2020

恒温槽を用いた一端開放および短絡回路の温度、湿度変化によって生じる影響の調査
前田 真之介; 小野 哲; 和田光司
Oral presentation, Japanese, 第34回エレクトロニクス実装学会春季講演大会論文集, エレクトロニクス実装学会, Domestic conference
03 Mar. 2020

フィルタ設計理論を用いた電力分配/合成器の設計に関する検討
小野 哲; 和田光司
Oral presentation, Japanese, 超高速・高周波ｴﾚｸﾄﾛﾆｸｽ実装研究会 令和元年度第4回公開研究会, Domestic conference
21 Feb. 2020

スタブ装荷型整合回路を用いたダイプレクサにおける減衰極の位置制御に関する基礎検討
大島心平; 鵜野直樹; 和田光司
Oral presentation, Japanese, 超高速・高周波ｴﾚｸﾄﾛﾆｸｽ実装研究会 令和元年度第4回公開研究会, Domestic conference
21 Feb. 2020

BSTバラクタを装荷した非対称ヘアピン型共振器を用いた結合係数調整が容易なチューナブルBPFとその分波回路への応用
荻久保暖香; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
31 Jan. 2020

不要モード抑制を目的としたEBG構造における等価回路の高精度化及び小型PRGW構造BPFの設計に関する検討
古谷佳祐; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
31 Jan. 2020

MWE2019マイクロウェーブ展 大学展示
和田光司研究室; 小野哲研究室
Poster presentation, Japanese, MWE2019 実行委員会, Domestic conference
27 Nov. 2019

ヘアピン共振器で構成した積層サスペンデッドマイクロストリップ線路共振器を用いたBPFの基板加工機による製作に関する検討
青木いりあ; 小野 哲; 和田光司
Oral presentation, Japanese, 超高速・高周波ｴﾚｸﾄﾛﾆｸｽ実装研究会 令和元年度第3回公開研究会, Domestic conference
22 Nov. 2019

マルチモードSIR(Stepped Impedance Resonator)を用いたチップレスRFIDタグの研究
酒井文則; 牧本三夫; 和田光司
Public discourse, Japanese, 第2回先進アナログ技術研究会, Domestic conference
10 Oct. 2019

品質工学を適用した集中定数素子を用いた高周波帯LPFの素子ばらつきに強い設計法に関する研究
今井勇太; 小野 哲; 和田光司
Oral presentation, Japanese, 第254回 NMS研究会, Domestic conference
06 Apr. 2019

パッチアンテナとλ/2 共振器を用いた積層サスペンデッドマイクロストリップ線路アンテナフィルタの設計
横山達也; 小野 哲; 和田光司
Oral presentation, Japanese, 2019年電子情報通信学会総合大会, Domestic conference
20 Mar. 2019

一端短絡・他端開放SIRを用いたチップレスRFIDタグの評価
佐川守一; 牧本三夫; 小野 哲; 酒井文則; 和田光司
Oral presentation, Japanese, 電気学会全国大会
14 Mar. 2019

デュアルモード共振器の縦続結合によって構成したチューナブルBPFの一検討
荒井 和輝; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
02 Mar. 2019

抵抗を装荷したヘアピン形共振器を用いたBPFによる通過帯域の平坦化
筑紫友洋; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(MW）, Domestic conference
16 Nov. 2018

一端短絡・他端開放共振器を用いたチップレスRFIDタグの検討
佐川守一; 牧本三夫; 小野 哲; 酒井文則; 和田光司
Oral presentation, Japanese, 2018年電子情報通信学会ソサイエティ大会, Domestic conference
14 Sep. 2018

スタブ装荷形ダンベルDGSを用いた多極特性を有するLPF
高橋 徹; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(MW）, Domestic conference
20 Jul. 2018

チップ素子及びパターン素子を用いたLPF及びHPFで構成した小型ダイプレクサの実現
酒井晶平; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(MW）, Domestic conference
21 Jun. 2018

インピーダンスステップスタブで構成したチップレスマイクロストリップ線路RFIDタグに関する検討
桑沢龍亮; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
03 Mar. 2018

ステップインピーダンス共振器を用いた小電力用デュアルバンド整流回路に関する検討
長浦正樹; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
03 Mar. 2018

[特別講演」高減衰量を有する楕円関数型低域通過フィルタの実現 ～ 遮蔽筐体及び遮蔽壁を用いた減衰量の確保 ～
横山達也; 小野 哲; 和田光司
Invited oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
01 Mar. 2018

[特別講演」楕円関数型HPFによる阻止域における高減衰量の実現 ～ シールドケースによる特性改善 ～
阿部 励; 小野 哲; 和田光司
Invited oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
01 Mar. 2018

[特別講演]プリント基板加工機によるVスロットDGSを用いた小型BRFの試作方法
中村流星; 小野 哲; 和田光司
Invited oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
01 Mar. 2018

平面フィルタの小型化のための基礎の勘所
和田光司; 小野 哲
Public discourse, Japanese, 2017Microwave Workshop & Exhibition, 電子情報通信学会APMC国内委員会
29 Nov. 2017

平面フィルタの高周波化のための基礎の勘所
小野 哲; 和田光司
Public discourse, Japanese, 2017Microwave Workshop & Exhibition, 電子情報通信学会APMC国内委員会
29 Nov. 2017

MWE2017マイクロウェーブ展 大学展示
和田光司研究室; 小野哲研究室
Poster presentation, Japanese, MWE2017 実行委員会, Domestic conference
29 Nov. 2017

電界結合と磁界結合を組み合わせた無線電力伝送用共振器の実験評価
早馬道也; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2017

インピーダンスステップ共振器を用いた一系統電源で中心周波数を広範囲に調整可能なチューナブルコムラインBPF
阿部 励; 大塚喬太; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
26 Jan. 2017

高周波スイッチ・バラクタダイオード装荷有極形共振器とバラクタダイオード装荷ｍ型アドミタンスインバータを用いた周波数可変BPF
辻 蒼一; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
26 Jan. 2017

SAW共振子装荷型マイクロストリップ線路共振器を用いたデュアルバンドBPF
張 原論; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会(CAS）, Domestic conference
26 Jan. 2017

インターディジタル型結合線路BPFを配置したマイクロストリップ線路小型ラットレースバランフィルタ
中村流星; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
16 Dec. 2016

結合線路を用いたLPF及びHPFで構成した小型ハイバンドUWB用LTCC基板BPF
末﨑裕己; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
16 Dec. 2016

チップコンデンサとマイクロストリップ線路で構成したCRLH伝送線路共振器を用いた有極形小型BPF
双石文彦; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
16 Dec. 2016

m型アドミタンスインバータを用いた周波数可変型BPF
辻 蒼一; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
16 Dec. 2016

共有共振器とλg/4ステップインピーダンス共振器を用いた有極形ダイプレクサ
足立一希; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
16 Dec. 2016

MWE2016マイクロウェーブ展 大学展示
和田光司研究室; 小野哲研究室
Poster presentation, Japanese, MWE2016 実行委員会, Domestic conference
30 Nov. 2016

コムライン結合線路装荷形マイクロストリップライン小型ラットレースバランフィルタ
中村流星; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
Nov. 2016

集中定数素子とバラクタダイオードで構成した3モード共振器を用いた小型チューナブルBPF
大塚喬太; 小野 哲; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
Nov. 2016

マイクロ波平面フィルタとその応用回路
和田光司; 小野哲
Invited oral presentation, Japanese, 次世代スマートデバイス構築のための高周波磁気調査専門委員会（一般社団法人電気学会 マグネティックス技術委員会 傘下）, Domestic conference
14 Oct. 2016

四つのポートに相違なる基準インピーダンスを設定したストリップ結合線路による1/4波長結合線路型カプラの設計と解析
大島 毅; 米田尚史; 宮下裕章; 宮崎守泰; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
Jun. 2016

(特別講演）開放スタブと接地スタブを装荷したリング共振器BPFによる低挿入損失特性の実現
林 和幸; 和田光司
Invited oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
Mar. 2016

(特別講演）プリント基板加工機によるマイクロストリップ線路とチップキャパシタを用いた2GHz帯超小型BPFの実現
川俣雅寿; 和田光司
Invited oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
Mar. 2016

集中定数素子で構成した3モード共振器を用いた有極形チューナブルBPFに関する検討
大塚喬太; 川俣雅寿; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
Mar. 2016

コムライン型結合線路装荷型ラットレース回路を用いたマイクロストリップ線路バランスフィルタに関する検討
中村流星; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
Mar. 2016

負性抵抗回路による減衰極付き共振回路の特性改善に関する検討
高田晃平; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
Mar. 2016

電気結合と磁気結合を組み合わせた無線電力伝送用共振器の検討
早馬道也; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2016

マルチモード共振器を用いたチップレスRFIDタグの検討
酒井文則; 牧本三夫; 佐川守一; 和田光司; 小脇洸幸
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2016

分布定数線路と集中定数素子で構成したCRLH伝送線路共振器を用いた有極形マルチバンド帯域通過フィルタに関する検討
双石文彦; 川俣雅寿; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
Dec. 2015

リング共振器で構成されたLPFと有極型結合線路BPFを用いた小型ダイプレクサに関する検討
岩本功貴; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
Dec. 2015

SAWフィルタを用いた分波回路における整合回路の構成法に関する一検討
大島 心平; 大島 知哲; 和田光司
Oral presentation, Japanese, 平成27年度第3回超高速高周波エレクトロニクス実装研究会, エレクトロニクス実装学会, Domestic conference
Nov. 2015

配置自由度を改善する無線電力伝送用2軸コイルの実験評価
早馬道也; 和田光司
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会, 電子情報通信学会, Domestic conference
Sep. 2015

ヘアピン型デュアルモード共振器を用いたバンドパスフィルタと通過帯域が近接した4分波回路への応用に関する検討
谷井宏成; 和田光司; 大野貴信
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会, Domestic conference
May 2015

配置自由度を改善する無線電力伝送用2軸共振器の検討
早馬道也; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会, 電子情報通信学会, Domestic conference
Mar. 2015

SAW共振子ラダー型フィルタを用いたマルチバンドフィルタと集中定数共振回路で構成した分波回路に関する一検討 US2014-83
榎股啓司; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会 超音波研究会
29 Jan. 2015

チューナブル特性を有する結合線路共振器を用いた小型有極形マイクロストリップ線路BPFに関する検討 MW2014-148
川俣雅寿; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会 マイクロ波研究会
18 Dec. 2014

マイクロストリップ結合線路トランスバーサルフィルタを用いたダイプレクサに関する検討 MW2014-149
林 和幸; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会 マイクロ波研究会
18 Dec. 2014

BSFと結合線路共振器を用いたBPFで構成したLTCC基板分波回路に関する検討 MW2014-150
菅 智貴; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会 マイクロ波研究会
18 Dec. 2014

SAW共振子で構成した誘導M型デュアルバンドBPFのBVD等価回路を用いた設計に関する検討 MW2014-161
江口照晃; 和田光司; 川内 治
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会 マイクロ波研究会
18 Dec. 2014

マルチモード・ステップインピーダンス共振器を用いたチップレスRFIDタグの検討,
牧本三夫; 酒井文則; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会 短距離無線通信研究会
17 Dec. 2014

SAWフィルタと低温同時焼成セラミック基板で構成した広帯域BPFを用いた高周波分波回路の開発
和田光司; 勝本達也; 大島心平; 村田龍司; 海老原均
Poster presentation, Japanese, セミコンジャパン2014, Domestic conference
03 Dec. 2014

“多極特性を有する誘導M型SAW共振子フィルタで構成した分波回路に関するBVD等価回路を用いた検討 US2014-47
江口照晃; 和田光司; 川内 治
Oral presentation, Japanese, 電子情報通信学会研究技術報告, 電子情報通信学会 超音波研究会
29 Sep. 2014

ＳＡＷフィルタと低温同時焼成セラミック基板を用いた広帯域フィルタで構成した高周波分波回路に関する検討
和田光司; 通信大; 勝本達也; 大島心平; 小山工業高等専門学校; 村田龍司; 海老原均
Others, Japanese, エレクトロニクス実装学会技術賞受賞記念講演, エレクトロニクス実装学会
01 Aug. 2014

共振器結合型ワイヤレス給電システムの最大効率の電磁界解析による検討
石飛 徳昌; 和田光司
Oral presentation, Japanese, 平成26年度第2回超高速高周波エレクトロニクス実装研究会論文集
Aug. 2014

SAWフィルタとLTCC基板を用いた広帯域フィルタで構成した高周波分波回路の開発と試作評価
和田光司; 通信大; 勝本達也; 大島心平; 小山工業高等専門学校; 村田龍司; 海老原均
Others, Japanese, エレクトロニクス実装学会 技術賞 受賞記念講演, エレクトロニクス実装学会
23 May 2014

キャパシタ装荷結合線路で構成したマイクロストリップ線路共振器とそれを用いた有極形小型BPFに関する検討
川俣雅寿; 福永貴徳; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
May 2014

マルチバンド共振器とSIRを用いた有極特性を有するLTCC基板で構成した小型分波回路に関する一検討
青木大地; 和田光司; 村田龍司; 原 浩史; 海老原 均; 大島心平
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Mar. 2014

両端開放型スパイラル共振器を用いた有極形ミリ波CMOSデュアルバンドBPFに関する一検討
山岸史弥; 谷井宏成; 佐川守一; 牧本三夫; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Mar. 2014

素子装荷形SAW共振子を用いた誘導M型BPFで構成したデュプレクサに関する検討
江口照晃; 川内治; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
Mar. 2014

λ/2－1次CRLH伝送線路共振器とλ/4－1次CRLH伝送線路共振器を用いた有極形ミリ波CMOS－BPF
鈴木雄祐; 牧本三夫; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
Mar. 2014

有極特性を有するタップ結合型容量装荷マイクロストリップ結合線路共振器とそれを用いた小型BPFに関する検討
川俣雅寿; 和田光司
Oral presentation, Japanese, 電子情報通信学会東京支部学生会研究発表会
Mar. 2014

平面形BPFを用いたダイプレクサにおける集中定数整合回路の設計に関する一検討
大島心平; 大島知哲; 和田光司
Oral presentation, Japanese, Proceeding of the 2014 IEICE General Conference 2014年総合大会講演論文集
Mar. 2014

広帯域通過特性を有する平面形高域通過フィルタの設計に関する一検討
中島貴大; 大島心平; 和田光司
Oral presentation, Japanese, 第4回電気学会東京支部群馬・栃木支部合同研究発表会 pp.29-32
Mar. 2014

RFスイッチ装荷型マイクロストリップ線路共振器BPFを用いた分波回路に関する検討
Bui Manh Khoa; 和田光司
Oral presentation, Japanese, ＪＩＥＰ超高速高周波エレクトロニクス実装研究会論文集(2014年2月)
Feb. 2014

インピーダンスステップ構造を有するマイクロストリップ線路共振器のQ値とその構造変化による特性改善
橋本和紀; 和田光司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Mar. 2013

CMOSプロセスを想定したインタディジタル結合線路と伝送線路を用いたミリ波有極形フィルタ
谷井宏成; 和田光司; 牧本三夫; 五十嵐貞男; 福井邦明; 小日向宏一
Oral presentation, Japanese, 第27回エレクトロニクス実装学会春季講演大会論文集 (2013年3月).
Mar. 2013

RFスイッチを装荷した有極形周波数可変マイクロストリップ線路共振器の基本特性
Bui Manh Khoa; 和田光司
Oral presentation, Japanese, 第27回エレクトロニクス実装学会春季講演大会論文集
Mar. 2013

自動車用インパルスアレーレーダのマルチモード化の検討（その1
酒井文則; 天野佳将; 牧本三夫; 五十嵐貞夫; 和田光司; 澤谷邦男
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2013

容量装荷タップ結合-1次λ/4CRLH伝送線路共振器による減衰極実現に関する基礎検討
近藤慎也; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2013

狭帯域近似法を用いた疑似楕円関数特性を有する誘導M型SAW共振子BPFの設計に関する一検討
森田健幸; 和田光司; 川内 治
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2013

24GHｚ帯BPF と26GHｚ 帯BPFを用いた 分波回路
和田光司
Others, Japanese, 革新的ビーム走査方式による26GHz帯ＵＷＢレーダの開発推進委員会
Jan. 2013

タップ結合型－1次CRLH伝送線路共振器BPFを用いた有極形LTCC基板ダイプレクサに関する一検討
岩本健太郎; 原 浩史; 大島心平; 村田龍司; 海老原 均; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2012

インタディジタル結合線路とグラウンドビア付き伝送線路を用いた高減衰量を有する広帯域BPFと広帯域ダイプレクサ
谷井宏成; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2012

スタブ装荷型共振器を用いた擬似楕円関数型準ミリ波バンドパスフィルタに関する一検討
高橋祐介; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2012

スイッチ装荷を想定した各種リング共振器で構成したチューナブルBPFの周波数移動量に関する一検討
福永貴徳; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2012

両端リング共振器を用いたミリ波ＣＭＯSバンドパスフィルタに関する一検討
山岸史弥; 谷井宏成; 佐川守一; 牧本三夫; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2012

SAW共振子を用いた楕円関数特性を有するバンドパスフィルタの設計に関する一検討
塚本和也; 宮田尚起; 上原健誠; 川内治; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Apr. 2012

スタブ形共振器を用いた楕円関数BPFで構成された有極型グランド付きコプレーナ線路トリプレクサに関する一検討
岡田真一; 宮田尚起; 和田光司
Oral presentation, Japanese, 電子情報通信学会,東京支部学生会研究発表会
Mar. 2012

高 Q の Two-port Absorption Resonator の設計と解析
石飛徳昌; 山田要介; 石野宏和; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2012

電磁界シミュレータによる結合線路と伝送線路の組み合わせたミリ波CMOS LPF/HPF/BPFの伝送特性に関する検討
谷井宏成; 牧本三夫; 五十嵐貞男; 福井邦明; 小日向宏一; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会,電子情報通信学会総合大会
Mar. 2012

結合線路と伝送線路の組み合わせによるCMOSプロセスの利用を想定したミリ波有極形LPF,HPF,BPFに関する一検討
谷井宏成; 牧本三夫; 五十嵐貞男; 福井邦明; 小日向宏一; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Jan. 2012

部品内蔵型LTCC基板を用いた無線モジュール用フィルタとその応用技術－広帯域化・マルチバンド化に対応したフィルタ技術と今後の展望－
大島心平; 和田光司; 村田龍司; 海老原均
Others, Japanese, 2011 Microwave Workshop & Exhibition, 電子情報通信学会APMC国内委員会
Dec. 2011

給電位置の変化による右手／左手系複合伝送線路共振器の共振特性とそれを用いた有極型マイクロストリップ線路BPFに関する一検討
笹浪雄作; 岩本健太郎; 宮田尚起; 石飛徳昌; 和田光司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Nov. 2011

LTCC基板を用いた小型RFフロントエンドモジュールの開発事例
大島心平; 和田光司; 村田龍司; 海老原均
Others, Japanese, 2011 Japan ANSYS Conference, アンシス・ジャパン株式会社
Oct. 2011

平衡型SAWフィルタとLTCC基板で構成した平衡型広帯域フィルタを用いたダイプレクサに関する検討
勝本達也; 大島心平; 村田龍司; 海老原均; 川内 治; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Oct. 2011

LTCC基板で構成したCRLH伝送線路共振器を用いた有極型BPFに関する一検討
岩本健太郎; 笹浪雄作; 宮田尚起; 大島心平; 村田龍司; 海老原均; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Oct. 2011

有極型CRLHマイクロストリップ線路共振器の共振特性とそのバンドパスフィルタへの適用に関する検討
笹浪雄作; 岩本健太郎; 宮田尚起; 石飛 徳昌; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Oct. 2011

ヘアピン型SIRを用いた26GHz帯マイクロストリップ線路BPFに関する検討
高橋祐介; 岡野晋一郎; 小舟一司; 五十嵐康博; 牧本三夫; 酒井文則; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Oct. 2011

高周波スイッチの利用を想定した周波数可変特性を有する有極形結合線路バンドパスフィルタに関する一検討
高岡良知; 石飛 徳昌; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Oct. 2011

マルチバンド周波数変換を用いたフィルタ設計における未知定数決定の一手法
宮田尚起; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Oct. 2011

ヘアピン型SIRを用いた26GHz帯車載レーダ用有極型マイクロストリップ線路BPFに関する実験的検討
高橋祐介; 岡野晋一郎; 小舟一司; 五十嵐康博; 牧本三夫; 酒井文則; 和田光司
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2011

平衡型SAWフィルタとLTCC基板で構成した平衡型広帯域フィルタを用いたダイプレクサ
勝本達也; 大島心平; 村田龍司; 海老原 均; 和田光司
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2011

ボンディングワイアの集中定数モデル抽出
石飛 徳昌; 和田光司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Jul. 2011

新26GHz帯車載レーダ用UWBフィルタ
和田光司
Others, Japanese, 革新的ビーム走査方式による26GHz帯ＵＷＢレーダの開発推進委員会
Jun. 2011

CRLH伝送線路共振器の給電位置に対する共振特性の変化
笹浪雄作; 岩本健太郎; 宮田尚起; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

タップ結合法を適用した有極型CRLH伝送線路共振器の基本特性
岩本健太郎; 笹浪雄作; 宮田尚起; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

容量性素子を装荷した両端短絡型SIRの基本特性
佐川守一; 牧本三夫; 和田紀子; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

スタブ形共振器を用いた楕円関数型マイクロストリップ線路BPF
宮田尚起; 岡田真一; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

可変容量素子装荷型結合線路共振器を用いた有極型チューナブルマイクロストリップ線路BPFに関する基礎検討
手塚純平; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

ヘアピン型SIRを用いた26GHz帯車載レーダ用有極型マイクロストリップ線路BPFに関する一検討
高橋祐介; 岡野晋一郎; 小舟一司; 五十嵐康博; 牧本三夫; 酒井文則; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

λ/4共振器結合開放端スタブと多導体結合線路を用いた広帯域マイクロストリップ線路BPFに関する一検討
清水康隆; 村田龍司; 大島心平; 島方幸広; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

LTCC基板で構成した３導体結合線路を用いた有極型広帯域BPFによるダイプレクサに関する一検討
齋藤光雄; 村田龍司; 大島心平; 海老原 均; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

オープンリング共振器を用いた小型LTCC基板UWBフィルタとSAWフィルタで構成されたダイプレクサ
井口俊太; 勝本達也; 大島心平; 村田龍司; 海老原 均; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

LTCC基板で構成した有極型バランスフィルタを用いたトリプレクサに関する一検討
早馬道也; 村田龍司; 大島心平; 海老原 均; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

SAWフィルタとLTCC基板を用いた小型クイントプレクサの一実現手法
大島心平; 和田光司; 村田龍司; 海老原 均; 金子裕臣; 森谷 亮; 川内 治
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2011

薄型LTCC基板で構成した有極型バランスフィルタを用いた2.6GHz/5.4GHz帯ダイプレクサに関する一検討
早馬道也; 村田龍司; 大島心平; 海老原均; 和田光司
Oral presentation, Japanese, 電子情報通信学会,東京支部学生会研究発表会
Mar. 2011

LTCC基板で構成したオープンリング共振器広帯域BPFとSAWフィルタを用いた分波回路に関する検討
井口俊太; 勝本達也; 大島心平; 村田龍司; 海老原均; 和田光司
Oral presentation, Japanese, 電子情報通信学会,東京支部学生会研究発表会
Mar. 2011

スタブ形共振器を用いた楕円関数型バンドパスフィルタで構成されたダイプレクサに関する検討
岡田真一; 宮田尚起; 和田光司
Oral presentation, Japanese, 電子情報通信学会,東京支部学生会研究発表会
Mar. 2011

26GHz帯UWBレーダ用フィルタ
和田光司
Others, Japanese, 革新的ビーム走査方式による26GHz帯ＵＷＢレーダの開発推進委員会
Jan. 2011

λ/4共振器結合型開放スタブを用いた広帯域BPFとLPFで構成されたマイクロストリップ線路分波回路に関する検討
清水康隆; 村田龍司; 大島心平; 島方幸広; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Dec. 2010

LTCC基板を用いた3導体結合線路によるUWB用小型ダイプレクサの検討"
齋藤光雄; 村田龍司; 大島心平; 海老原均; 和田光司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会（平成22年度第3回公開研究会
Nov. 2010

高周波受動フィルタに関する研究の実際・展望・課題
和田光司
Others, Japanese, 太陽誘電モバイルテクノロジー株式会社
Oct. 2010

LTCC基板で構成した有極型バランスフィルタを用いたダイプレクサに関する検討
早馬道也; 村田龍司; 大島心平; 海老原均; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Sep. 2010

LTCC基板で構成した広帯域フィルタとSAWフィルタを用いたRFモジュール用分波回路
勝本達也; 大島心平; 村田龍司; 海老原均; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,マイクロ波研究会
Sep. 2010

薄型LTCC基板で構成したUWBフィルタとSAWフィルタを用いた有極型ダイプレクサ
勝本達也; 大島心平; 村田龍司; 海老原均; 和田光司
Oral presentation, Japanese, エレクトロニクス実装学会,平成22年度第1回公開研究会
May 2010

チューナブル特性を有する広帯域マイクロストリップ結合線路BPFに関する実験的検討
須賀勇介; 太田謙一; 和田光司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Mar. 2010

巻き線型共振器を用いたLTCC基板内蔵広帯域フィルタの小型化
大島心平; 和田光司; 村田龍司; 島方幸広
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2010

UWB用小型積層デュアルバンドBPF
大城和宣; 高岡宏知; 牛江正彦; 清水祐一; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2010

薄型LTCC基板を用いたUWBフィルタとSAWフィルタを用いたRFフロントエンドモジュール用小型ダイプレクサ
勝本達也; 大島心平; 村田龍司; 海老原均; 和田光司
Oral presentation, Japanese, 電子情報通信学会,東京支部学生会研究発表会
Mar. 2010

周波数変換によるマルチバンド楕円関数フィルタの設計
宮田尚起; 和田光司
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2010

結合線路構造を用いたチューナブル特性を有する広帯域BPFに関する検討
須賀勇介; 太田謙一; 和田光司
Oral presentation, Japanese, エレクトロニクス実装研究会,超高速高周波エレクトロニクス実装研究会（平成21年度第3回公開研究会
Nov. 2009

UWB無線通信用フィルタとその応用回路技術
大島心平; 和田光司; 村田龍司; 島方幸弘
Others, Japanese, 2009 Japan ANSYS Conference, アンシス・ジャパン株式会社 アンソフト・ジャパン株式会社 サイバネットシステム株式会社
Nov. 2009

有極型LPF/HPFを用いた無線LAN用ダイプレクサに関する基礎検討
島崎智拓; 大島心平; 村田龍司; 島方幸広; 和田光司
Oral presentation, Japanese, 電子情報通信学会,電子情報通信学会ソサイエティ大会
Sep. 2009

周波数変換によるマルチバンドフィルタの設計に関する一検討
宮田尚起; 和田光司
Oral presentation, Japanese, 電子情報通信学会,電子情報通信学会ソサイエティ大会
Sep. 2009

キャパシタ装荷型結合線路と開放スタブ装荷型バランを用いた積層パランスフィルタに関する一検討
早馬道也; 村田龍司; 大島心平; 島方幸広; 和田光司
Oral presentation, Japanese, 電子情報通信学会,電子情報通信学会ソサイエティ大会
Sep. 2009

LTCC技術を活用したUWB用広帯域トリプレクサ
大島心平; 和田光司; 村田龍司; 島方幸広
Oral presentation, Japanese, 電子情報通信学会,電子情報通信学会ソサイエティ大会
Sep. 2009

部品内蔵基板（低温同時焼成セラミックス基板）に適した広帯域フィルタ技術
大島心平; 和田光司; 村田龍司; 島方幸弘
Others, Japanese, サマーセミナー2009, (社)エレクトロニクス実装学会
Aug. 2009

小型無線モジュール用LTCC基板内蔵広帯域トリプレクサに関する一検討
大島心平; 和田光司; 村田龍司; 島方幸広
Oral presentation, Japanese, エレクトロニクス実装学会,平成21年度第2回公開研究会
Jul. 2009

先端開放スタブ装荷型バランとキャパシタ装荷型結合線路を用いた小型積層バランスフィルタに関する検討
早馬 道也; 村田龍司; 大島 心平; 島方 幸広; 和田 光司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
May 2009

LTCC技術を用いた小型広帯域フィルタ及び分波回路に関する検討
大島心平; 和田光司; 村田龍司; 島方幸弘
Oral presentation, Japanese, 輻射科学研究会,輻射科学研究会3月例会
Mar. 2009

λ/４共振器結合型開放スタブを用いた有極型広帯域ＢＰＦと有極型ＬＰＦを用いた分波回路に関する検討
清水康隆; 村田龍司; 大島心平; 島方幸弘; 和田光司
Oral presentation, Japanese, 輻射科学研究会,輻射科学研究会3月例会
Mar. 2009

広帯域フィルタ並列接続型積層デュアルバンドフィルタに関する一検討
大島 心平; 和田 光司; 村田 龍司; 島方 幸広
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Feb. 2009

帯域阻止特性を有するデュアルバンド共振器を用いた積層広帯域フィルタに関する一検討
徐 峰寧; 大島 心平; 村田 龍司; 島方 幸広; 和田 光司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Feb. 2009

ＵＷＢ無線モジュール用ＬＴＣＣ基板内臓フィルタ
大島心平; 村田龍司; 島方幸弘; 和田光司
Oral presentation, Japanese, エレクトロニクス実装学会,電子部品研究会 公開研究会
Nov. 2008

広帯域特性を有するデュアルバンドストリップ線路バランに関する基礎検討
宮村雅俊; 村田正樹; 元山洋人; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

整合補償回路付き広帯域マイクロストリップ線路バランに関する実験的検討
村田正樹; 元山洋人; 木村広伸; 水谷靖彦; 平井隆己; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

有極特性を有する広帯域積層デュアルバンドフィルタに関する検討
高岡宏知; 牛江正彦; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

結合線路を用いたマイクロストリップ線路広帯域デュアルバンドフィルタに関する基礎検討
谷井宏成; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

LTCC基板に内蔵可能な広帯域デュアルバンドフィルタ
大島心平; 和田光司; 村田龍司; 島方幸弘
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

キャパシタ装荷コムライン型結合線路を用いた広帯域通過特性を有するデュアルバンドフィルタに関する検討
許 秉忠; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

減衰極の制御機能付き結合線路を用いたBPFとLPFを組み合わせたマイクロストリップ線路ダイプレクサに関する検討
島方幸広; 清水康隆; 村田龍司; 大島心平; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

λ/4共振器結合型開放端スタブを用いた有極型広帯域マイクロストリップ線路BPF
清水康隆; 村田龍司; 大島心平; 島方幸広; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

分布定数タップ結合型共振器を用いた積層型広帯域BPFに関する基礎検討
佐藤 亮; 村田龍司; 大島心平; 島方幸広; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2008

タップ結合型マイクロストリップ線路共振器を用いた有極型バランスフィルタに関する実験的検討
久保芳之; 和田光司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
May 2008

ＵＷＢ,ＷｉＭａｘ, Ｗ－ＬＡＮに対応したプリント基板フィルタおよび積層フィルタ
和田光司
Others, Japanese, JST新技術説明会
May 2008

分布定数タップ結合型チューナブル共振器を用いた広帯域コプレーナ線路BPFに関する実験的検討
須賀勇介; 太田謙一; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Apr. 2008

分布定数タップ結合型共振器を用いた有極型積層広帯域BPFに関する基礎検討
佐藤 亮; 島方幸広; 村田龍司; 大島心平; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Apr. 2008

LTCC基板に内蔵可能な低背型積層バランに関する一検討
大島心平; 和田光司; 村田龍司; 島方幸広
Oral presentation, Japanese, エレクトロニクス実装学会,エレクトロニクス実装学会講演大会
Mar. 2008

折り曲げ構造を有する両端開放型共振器を用いた多層型ＢＰＦに関する一検討
笠舞 真史; 牛江 正彦; 和田 光司; 岩崎 俊
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Feb. 2008

有極形LPF及び広帯域BPFを用いたLTCC基板内蔵小型ダイプレクサに関する一検討
大島心平; 和田光司; 村田龍司; 島方幸広
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Feb. 2008

8.4GHz帯低背型広帯域BPFに関する一検討
高岡宏知; 牛江正彦; 和田光司; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Feb. 2008

λ/2伝送線路の折り返し構造を用いた低背型積層バランに関する一検討
大島心平; 和田光司; 村田龍司; 島方幸広
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Jan. 2008

帯域外減衰特性を改善するインタディジタル共振器を用いたBPF構造に関する一提案
福永達也; 粟井郁雄; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Jan. 2008

タップ結合法を適用した有極形/広帯域デュアルバンドマイクロストリップ線路BPFに関する実験的検討
奥崎伸彦; 島方幸広; 山内拡幸; 和田光司; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Oct. 2007

教育現場における電磁界・回路シミュレータの活用と応用事例
和田光司; 中谷彰文; 太田謙一
Others, Japanese, 技術セミナー2007, アンソフト社
Oct. 2007

広帯域特性を有する小型積層バランに関する検討
元山洋人; 村田正樹; 和田光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2007

整合補償回路付きマイクロストリップ線路バランによる広帯域化に関する一検討
村田正樹; 元山洋人; 木村広伸; 水谷靖彦; 平井隆己; 和田光司; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2007

結合線路と分布定数タップ結合型共振器を組み合わせた小型広帯域マイクロストリップ線路BPFの実験的検討
清水康隆; 和田光司; 西村 太; 笹部孝司; 植野嘉章; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2007

タップ結合型共振器を用いたマイクロストリップ線路デュアルバンドフィルタに関する検討―有極特性と広帯域特性実現に着目して―
奥崎伸彦; 島方幸弘; 山内拡幸; 和田光司; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2007

タップ結合型共振器を用いた有極形マイクロストリップ線路バランスフィルタ
久保芳之; 和田光司; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2007

広帯域BPFと有極形LPFを組み合わせたマイクロストリップ線路ダイプレクサの一検討
清水康隆; 村田龍司; 大島心平; 島方幸広; 和田光司; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2007

タップ結合法を用いた有極形フィルタによる帯域外特性改善技術とその応用
和田光司; 中谷彰文; 太田謙一; 奥崎伸彦; 久保芳之; 清水康隆; 村田正樹; 高岡宏知
Others, Japanese, 「ミリ波技術のグローバルシステム応用とその展開」第10回調査専門委員会, 電気学会
Sep. 2007

結合線路と分布定数タップ結合型共振器を組み合わせたマイクロストリップ線路広帯域フィルタ,
清水康隆; 西村太; 笹部孝司; 植野嘉章; 和田光司; 岩崎俊
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
May 2007

分布定数タップ結合型ＭＳＬ共振器を用いた各種広帯域ＢＰＦに関する実験的検討
谷井宏成; 西村太; 笹部孝司; 植野嘉章; 和田光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Mar. 2007

GAを用いた広帯域マイクロストリップ線路BPFの設計に関する一考察
安藤芳晃; 和田光司; 水柿義直; 陳健; 谷井宏成
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Mar. 2007

マイクロストリップ線路共振器を用いた小型広帯域ＢＰＦに関する実験的検討
谷井宏成; 西村太; 笹部孝司; 植野嘉章; 和田光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Mar. 2007

結合線路を用いた広帯域マイクロストリップ線路フィルタに関する一検討
和田光司; 砂澤文; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Mar. 2007

超伝導シールド層の接地位置の違いによる相互インダクタンスの変化
柏竜太; 守屋雅隆; 宇佐美興一; 小林忠行; 和田 光司; 安藤芳晃; 陳 健; 水柿義直
Oral presentation, Japanese, 電子情報通信学会総合大会,電子情報通信学会総合大会
Mar. 2007

2次元M型CIP法の数値分散に関する検討
安藤芳晃; 和田 光司; 水柿義直; 陳 健; 早川正士
Oral presentation, Japanese, 電子情報通信学会総合大会,電子情報通信学会総合大会
Mar. 2007

ブランチスタブ型共振器BPFにおける通過帯域近傍の特性改善に関する検討
安住壮紀; 大野貴信; 橋本修; 和田 光司
Oral presentation, Japanese, 電子情報通信学会,電子情報通信学会総合大会
Mar. 2007

ＵＷＢプレーナ型パッシブフィルタの高性能化
和田 光司
Others, Japanese, 平成17年度～平成18年度科学研究費補助金（基盤研究(C)）研究成果報告書
Mar. 2007

容量装荷λ/2MSL共振器を用いた直接結合型BPFに関する実験的検討
松本真; 島方幸広; 山内拡幸; 和田光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Jan. 2007

タップ結合法を適用したマイクロストリップ線路共振器を用いた有極形デュアルバンドフィルタに関する実験的検討
奥崎伸彦; 島方幸弘; 山内拡幸; 和田光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会,
Jan. 2007

ブランチスタブを用いたBPFによる通過帯域近傍の特性改善に関する基礎検討
安住壮紀; 大野貴信; 橋本修; 和田光司
Oral presentation, Japanese, 電子情報通信学会,,マイクロ波研究会
Jan. 2007

広帯域積層導波管バランスフィルタの一検討
福永達也; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Jan. 2007

容量装荷コプレーナ線路共振器を用いた高調波共振応答改善型BPFに関する一検討
松本 真; 島方幸広; 山内拡幸; 和田光司; 岩崎 俊
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Jan. 2007

並列容量装荷λ/２共振器ＢＰＦの設計に関する一検討
松本真; 島方幸広; 荻野剛士; 和田光司; 岩崎 俊
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Nov. 2006

タップ結合法を用いた各種有極特性を有するチューナブルλ／２共振器BPFの理論検討
金原正典; 和田光司; 橋本修
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Nov. 2006

スタブ及び棒状誘電体を周期的に装荷した伝送線路を用いた広帯域BPFの帯域特性制御に関する検討
峰英紀; 橋本修; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Oct. 2006

インダクタ装荷型λ/4ＣＰＷ共振器ＢＰＦの基本性能とチューナブル化への応用 －可変容量ダイオードのインダクタンス成分に着目して－
小俣皓司; 大野貴信; 和田光司; 橋本修
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Sep. 2006

半波長共振器と１/４波長共振器からなる2周波複合プレーナ共振器
石丸健太; 北沢祥一; 下代雅啓; 大橋正治; 藤本英昭; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Sep. 2006

インターディジタル状に共振器を配置した積層バランスフィルタに関する一検討
福永達也; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Sep. 2006

SIRを用いた２段コムライン結合線路フィルタの減衰極の配置位置に関する検討
福永達也; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Sep. 2006

分布定数タップ結合型容量装荷共振器を用いたUWB用BPFに関する検討
谷井宏成; 西村太; 笹部孝司; 植野嘉章; 和田 光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

分布定数タップ結合マイクロストリップ線路共振器を用いた広帯域BPFの小型化
西村太; 谷井宏成; 笹部孝司; 植野嘉章; 和田 光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

タップ結合型共振器を用いた有極形バランスフィルタの一検討
和田 光司; 久保芳之; 岩崎 俊; 福永達也
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

タップ結合型λ/4チューナブル共振器BPFに関する実験的検討－可変容量ダイオードのインダクタンス成分に着目して－
大野貴信; 小俣皓司; 和田 光司; 橋本修
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

タップ結合型共振器BPFを用いたクワッドプレクサに関する基礎検討
大野貴信; 和田 光司; 橋本修
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

準集中定数素子を用いた直列及び並列共振器によるMSL－BPFの広帯域特性に関する一検討
大野貴信; 大野祐二; 和田 光司; 橋本修
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

ブランチスタブ型共振器の設計に関する基礎検討
大野貴信; 安住壮紀; 和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

ヘアピン構造を有する誘電体棒装荷型MSL共振器LPFに関する検討
中島 惇; 和田 光司; 橋本 修; 高橋 毅
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

誘電体周期構造を用いた広帯域BPFの特性制御に関する基礎検討
峰 英紀; 橋本 修; 和田 光司; 高橋 毅
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

両端接地型λ/2ストリップ線路共振器とλ/4コプレーナ共振器を用いたデュアルバンドフィルタの基礎検討
北沢祥一; 下代雅啓; 大橋正治; 藤本英昭; 和田 光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

小型誘電体バランスフィルタ
福永達也; 和田 光司
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

タップ結合法を用いた多極形マイクロストリップ線路共振器フィルタの設計に関する基礎検討
竹村康一郎; 島方幸弘; 和田 光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会,ソサイエティ大会
Sep. 2006

分布定数タップ結合型MSL共振器を用いた小型広帯域BPFの実験的検討
和田 光司; 谷井 宏成; 西村 太; 笹部孝司; 植野 嘉章; 岩崎 俊
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Aug. 2006

両端接地型λ/2ストリップ線路共振器とλ/4コプレーナ共振器を用いたデュアルバンドフィルタに関する一検討
北沢祥一; 下代雅啓; 大橋正治; 藤本英昭; 和田光司
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Jul. 2006

インダクタを装荷したタップ結合型λ/4共振器BPFに関する実験的検討
大野貴信; 小俣皓司; 和田光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会マイクロ波研究会研究技術報告
Jun. 2006

タップ結合法を適用したBPFにより構成された分波回路の整合回路設計に関する一検討
西堀満洋; 和田光司; 岩崎俊; 福永達也
Oral presentation, Japanese, 電子情報通信学会技術研究報告
Jun. 2006

有極型デュアルバンドBPFの設計に対応したインバータ回路に関する理論検”
奥崎伸彦; 和田 光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会技術研究報告
Jun. 2006

チップ部品を用いたマイクロ波帯回路設計高精度化の一検討
荻野剛; 横山直人; 和田光司
Oral presentation, 電子情報通信学会,電子情報通信学会技術研究報告
Mar. 2006

誘電体装荷MSL共振器の等価回路解析法の一検討 ～端部効果の補正に関連して～
佐々木恭平; 柴田幸司; 和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2006

広帯域通過特性を有する有極形MSL共振器BPFの実験的検討
西村太; 谷井宏成; 笹部孝司; 植野嘉章; 和田 光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2006

分布定数タップ結合共振を用いたUWB用BPFの小型化
谷井宏成; 西村太; 笹部孝司; 植野嘉章; 和田 光司; 岩崎俊
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2006

有極特性を有する広帯域マイクロストリップ線路BPFの実験的検討 －分布定数タップ結合共振器を用いた構成に着目して－
谷井宏成; 西村太; 笹部孝司; 植野嘉章; 和田光司; 岩崎俊
Oral presentation, 電子情報通信学会,電子情報通信学会技術研究報告
Jan. 2006

タップ給電/タップ段間結合を用いた有極形共振器BPFの設計に関する一検討 －両端開放型共振器を適用した場合に着目して－
和田光司; 松本真; 岩崎俊
Oral presentation, 電子情報通信学会,電子情報通信学会技術研究報告
Jan. 2006

高誘電率を有する誘電体棒を装荷したLPFに関する解析的検討 －減衰極実現と小型化に着目して－
和田光司; 中島 惇; 峰 英紀; 橋本 修; 高橋 毅
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Dec. 2005

ステップ線路タップ結合SIRを用いた有極形BPFに関する検討 －線路接続部の不連続の等価回路を考慮した場合の設計に着目して－
竹村康一郎; 島方幸広; 和田光司; 岩崎俊
Oral presentation, 電子情報通信学会,電子情報通信学会技術研究報告
Dec. 2005

広帯域通過特性を有するMSL共振器BPFの解析的検討 －広帯域通過特性を有する有極形共振器の利用に着目して－
西村太; 谷井宏成; 笹部孝司; 植野嘉章; 和田光司; 岩崎俊
Oral presentation, 電子情報通信学会,電子情報通信学会技術研究報告
Dec. 2005

両端接地型λ/2共振器とλ/4共振器を用いたデュアルバンドBPF用プレーナ共振器の基礎特性
北沢祥一; 和田光司; 藤本英昭; 下代雅啓; 大橋正治
Oral presentation, 電子情報通信学会,電子情報通信学会技術研究報告
Nov. 2005

誘電体装荷MSL共振器の等価回路解析法の基礎検討
柴田幸司; 佐々木恭平; 和田光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,電子情報通信学会研究技術報告
Oct. 2005

スタブ共振器フィルタの帯域通過・帯域阻止特性の周期性に関する基礎検討
和田光司; 奥崎信彦; 岩崎俊; 電通
Oral presentation, Japanese, 2005年電子情報通信学会エレクトロニクスソサイエティ大会
Sep. 2005

共振器混在型マイクロストリップ線路ＢＰＦによる広帯域特性実現・通過帯域幅制御・小型化に関する検討
西村太; 笹部孝司; 植野嘉章; 松下電工解析センター; 谷井宏成; 和田光司; 岩崎俊; 電
Oral presentation, Japanese, 2005年電子情報通信学会エレクトロニクスソサイエティ大会
Sep. 2005

有極特性を有するFull-Band UWB用MSL共振器BPFの伝送特性に関する一検討
谷井宏成; 西村太; 笹部孝司; 植野嘉章; 下電工解析センター; 和田光司; 岩崎俊; 電
Oral presentation, Japanese, 2005年電子情報通信学会エレクトロニクスソサイエティ大会
Sep. 2005

有極型タップ結合共振器BPFを用いたデュプレクサの分岐部に関する検討
和田光司; 西堀満洋; 岩崎俊; 電通
Oral presentation, Japanese, 2005年電子情報通信学会エレクトロニクスソサイエティ大会
Sep. 2005

有極特性を有する３段デュアルバンド共振器ＢＰＦの設計に関する一検討
和田光司; 奥崎信彦; 岩崎俊; 電通
Oral presentation, Japanese, 2005年電子情報通信学会エレクトロニクスソサイエティ大会
Sep. 2005

誘電体周期構造を用いた広帯域阻止特性の実現とマイクロ波フィルタへの応用
峰 英紀; 橋本 修; 和田光司; 高橋 毅
Oral presentation, Japanese, 電子情報通信学会,電子情報通信学会研究技術報告
Sep. 2005

素子装荷タップ結合型両端接地CPW共振器を用いたBPFのフィルタ特性に関する検討
和田光司; 中島奈緒子; 橋本修
Oral presentation, 電子情報通信学会,電子情報通信学会研究会技術報告
Mar. 2005

チューナブルλ/2 CPW共振器を用いた有極型BPFの基板構成に関する検討
渡邊慎也; 金原正典; 和田光司; 橋本修
Oral presentation, 電子情報通信学会,電子情報通信学会研究技術報告
Mar. 2005

有極型BPFを用いた分波回路の設計と特性制御 ～ 通過帯域間幅制御、帯域外特性改善、高アイソレーション特性に着目して ～
和田光司; 松田直紀; 岩崎 俊; 橋本修
Oral presentation, 電子情報通信学会,電子情報通信学会研究技術報告
Mar. 2005

分布定数タップ結合型共振器を用いた有極型BPFによる広帯域通過特性の実現に関する検討
和田光司; 谷井宏成; 岩崎俊; 電通
Oral presentation, Japanese, 超高速高周波エレクトロニクス実装研究会
Nov. 2004

タップ結合型λ/4共振器BPFによるチューナブル特性実現に関する検討
鈴木淳之; 和田光司; 橋本修
Oral presentation, Japanese, 信学技報
Nov. 2004

マイクロストリップLTCC共振器における共振特性改善の一手法
和田光司; Pokharel R.K; 橋本修; 高橋毅
Oral presentation, Japanese, 信学技報
Oct. 2004

広帯域通過特性を有する有極型BPFに関する基礎検討
和田光司; 谷井宏成; 岩崎俊; 電通
Oral presentation, Japanese, 電子情報通信学会マイクロ波研究会研究技術報告
Sep. 2004

LCタップ結合λ/2共振器BPFを用いたアンテナ共用器に関する検討
和田光司; 松田直紀; 岩崎俊(電通大; 橋本修
Oral presentation, Japanese, 電子情報通信学会2004年ソサイエティ大会
Sep. 2004

λ/2共振器を用いた広帯域BPFに関する基礎検討
和田光司; 谷井宏成; 岩崎俊; 電通
Oral presentation, Japanese, 電子情報通信学会2004年ソサイエティ大会
Sep. 2004

多極特性を有するコプレーナ型トリプレクサに関する検討
大野貴信; 和田光司; 橋本 修
Oral presentation, Japanese, 信学技報
Sep. 2004

両端開放型λ/2CPW共振器を用いた有極型チューナブルBPF
渡邊慎也; 須賀良介; 橋本 修; 和田光司
Oral presentation, Japanese, 信学技報
Sep. 2004

各種λ/２共振器で構成された有極型BPFによるデュプレクサの特性改善に関する検討
和田光司; 松田直紀; 岩崎俊(電通大; 橋本修
Oral presentation, Japanese, 電子情報通信学会マイクロ波研究会研究技術報告
Sep. 2004

LC装荷タップ結合を用いた両端接地型λ/2CPW共振器BPFの実験的検討
Ramesh Pokharel; 中島奈緒子; 和田 光司; 橋本修
Oral presentation, Japanese, 電子情報通信学会総合大会
Sep. 2004

λ/2共振器BPFを用いたアンテナ共用器の設計に関する基礎検討
和田光司; 松田直紀; 岩崎俊; 橋本修
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Aug. 2004

誘電体装荷型MSL共振器の等価回路解析に関する基礎検討
柴田幸司; Ramesh Pokharel; 和田光司; 橋本修
Oral presentation, Japanese, 平成16年度電気関連学会東北支部大会
Aug. 2004

LC装荷タップ結合／分布定数装荷タップ結合を用いたλ/2CPW共振器の共振特性
和田 光司; 渡辺 拓人; 橋本 修
Oral presentation, Japanese, 電子情報通信学会総合大会,総合大会
Mar. 2004

チューナブル特性を有するλ/4CPW共振器BPFの設計及び製作
鈴木 淳之; 和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会総合大会,総合大会
Mar. 2004

LC装荷タップ結合型λ/4CPW共振器BPFの実験的検討
立見 誠; 和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会総合大会,総合大会
Mar. 2004

有極特性を有するλ/2共振器BPFのチューナブル特性に関する検討
和田 光司; 渡邊 慎也; 橋本 修
Oral presentation, Japanese, 電子情報通信学会総合大会,総合大会
Mar. 2004

λ/2共振器混在型BPFのチューナブル特性に関する理論検討
渡邊慎也; 金原正典; 和田 光司; 橋本修
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2004

集中定数装荷/分布定数装荷タップ結合共振器を用いた帯域通過フィルタの設計に関する基礎検討
和田光司; 渡辺 拓人; 橋本修
Oral presentation, Japanese, 超高速高周波エレクトロニクス実装研究会
Feb. 2004

両端開放型λ/２共振器を用いたチューナブル型帯域通過フィルタの設計
和田光司; 渡邊慎也; 須賀良介; 橋本修
Oral presentation, Japanese, 超高速高周波エレクトロニクス実装研究会
Feb. 2004

[特別講演] 2003年アジア・パシフィックマイクロ波会議出席報告
西野有; 出口博之; 上田博民; 真田篤志; 和田光司; 堀田昌志; 太郎丸真; 鐘石,俵覚
Oral presentation, Japanese, 信学技報
Jan. 2004

平面型フィルタの技術動向「ミリ波技術を用いたシステムの高機能化とその展開」
和田 光司; 橋本 修
Others, Japanese, 電気学会調査専門委員会
Dec. 2003

λ/2共振器の励振方法による共振特性の変化に関する検討
和田 光司; 渡辺 拓人; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2003

マイクロストリップ型結合線路BPFの帯域外特性改善に関する実験的検討,"
和田 光司; 立見 誠; 神山 智英; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2003

異なる共振器を用いた有極型BPFに関する一検討
和田 光司; 立見 誠; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

各種λ/4共振器を用いたBPFの減衰極配置に関する検討
和田 光司; 立見 誠; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

λ/4共振器における共振周波数および減衰極のチューナブル化に関する基礎的検討
和田 光司; 鈴木 敦之; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

減衰極制御機能を有するBPFを用いたトリプレクサに関する一検討
大野 貴信; 和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

有極特性を有するλ/２共振器のチューナブル特性に関する一検討
和田 光司; 須賀 良介; 鈴木 敦之; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

三次元周期構造誘電体の透過特性に関する実験的検討
沖本 浩二; 和田 光司; 鈴木 進介; 高橋 毅 橋本
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

誘電体基板内部に棒状誘電体を周期的に配置したMSLの実験的検討
和田 光司; 沖本 浩二; 鈴木進介; 橋本 修; 高橋 毅
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

LCタップ結合型λ/4共振器BPFにおける減衰極の位置制御
神山 智英; 和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

素子装荷タップ結合型λ/4SIRを用いたBPFの設計
和田 光司; 神山 智英; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

誘電体棒を装荷したλ/2 MSL 共振器による共振特性改善に関する基礎検討
Pokharel Ramesh; 和田 光司; 沖本 浩二; 橋本 修; 高橋 毅
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

LCタップ結合を用いた両端接地型λ/２共振器の基本特性とそれを用いた２段BPF
和田 光司; 田中 哲広; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

LCタップ結合を適用した両端開放型λ/2共振器を用いたBPFに関する検討
和田 光司; 渡辺 拓人; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2003

誘電体基板内部に棒状誘電体を周期的に配置したマイクロストリップ線路による帯域阻止特性の実現
和田 光司; 沖本 浩二; 鈴木進介; 橋本 修; 高橋 毅
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Aug. 2003

Resonance Characteristics of an MSL Resonator Loaded with Dielectric Rods inside Dielectric Substrate
Pokharel Ramesh Kumar; 和田 光司; 沖本 浩二; 橋本 修; 高橋 毅
Oral presentation, English, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Aug. 2003

Design of 3-Pole Bandpass Filters Using Short-Ended Half-Wavelength Resonators and Their Applications to a Duplexer
K.Wada; T.Kamiyama; Y.Aihara; O.Hashimoto
Oral presentation, English, 電子情報通信学会,マイクロ波研究会
Jul. 2003

A Duplexer Consisting of 2-Pole Bandpass Filters Using Mixed Tapped Resonators
T. Ohno; K.Wada; O.Hashimoto
Oral presentation, English, 電子情報通信学会,マイクロ波研究会
Jul. 2003

マイクロストリップ結合線路を用いたBPFの帯域外特性改善に関する検討
和田 光司; 立見 誠; 神山 智英; 橋本 修
Oral presentation, Japanese, 電気学会計測研究会
Jun. 2003

マイクロストリップ結合線路を用いたコムライン型バンドパスフィルタの帯域外特性改善に関する基礎的検討
和田 光司; 立見 誠; 神山 智英; 橋本 修
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
May 2003

Band Elimination Characteristics of Stripline with Periodic Dielectric Rods inside Dielectric Substrate
沖本 浩二; 和田 光司; 橋本 修; 高橋 毅
Oral presentation, English, エレクトロニクス実装学会
May 2003

平面型フィルタの技術動向および特性改善法
和田 光司
Others, Japanese, REALIZEマイクロ波基礎講座, リアライズ社
Dec. 2002

誘電体基板内部に周期構造誘電体を構成した マイクロストリップ線路の伝送特性に関する検討
鈴木 進介; 和田 光司; 橋本 修; 高橋 毅
Oral presentation, Japanese, 電子情報通信学会,マイクロ波研究会
Nov. 2002

Design Methodology of Bandpass Filters Using λ/4 Resonators for Improving Out-of-Band Characteristics
K.Wada; T.Kamiyama; O.Hashimoto
Oral presentation, English, 電子情報通信学会,マイクロ波研究会
Nov. 2002

A Study on a Coplanar Bandpass Filter with Transmission Zeros Usingλ/4 Resonators
K.Wada; M.Tatsumi; T.Kamiyama; O.Hashimoto
Oral presentation, English, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Nov. 2002

両端接地型共振器ＢＰＦの有極化とその効果を利用したアンテナ共用器の特性改善に関する基礎検討
和田 光司; 田中哲広; 神山智英; 橋本修
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会(2002－11)
Nov. 2002

An Empirical Study of a Bandpass Filter with Attenuation Poles Using Tapped Short-Ended λ/2 CPW Resonators
K.Wada; Y.Aihara; O.Hashimoto
Oral presentation, English, 電子情報通信学会
Oct. 2002

帯域外特性改善形λ/4共振器BPFの一設計法
和田 光司; 神山 智英; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2002

コムライン形/インタディジタル形結合線路BPFのスプリアス応答改善に関する一検討
和田 光司; 立見 誠; 神山 智英; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

減衰極数制御形SIR-BPFとそのアンテナ共用器への応用
大野 貴信; 和田 光司; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

タップ結合法の適用による小型BPFの実現とその特性改善
大野 貴信; 和田 光司; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

各種結合線路の基本性能とそれを用いた縁端結合形共振器BPF
和田 光司; 青木 善浩; 大野 貴信; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

各種λ/2共振器帯域通過フィルタの帯域外特性改善に関する検討
和田 光司; 中川 浩一; 大野 貴信; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

各種λ/4共振器を用いた帯域外特性改善形帯域通過フィルタの一設計法
神山 智英; 和田 光司; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

両端開放形結合線路を用いたバンドパスフィルタの高調波共振応答改善
中川 浩一; 和田 光司; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

両端開放形λ/2共振器と両端開放形結合線路を混在したBPF
中川 浩一; 和田 光司; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

CPWを用いた両端接地形λ/2共振器BPFにおける実験的検討
相原 良行; 和田 光司; 橋本 修; 原田 博司
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

両端接地形λ/2共振器BPFにおける減衰極実現法
和田 光司; 相原 良行; 神山 智英; 橋本 修
Oral presentation, Japanese, 電気学会,電子・情報・システム部門大会
Sep. 2002

異終端結合線路の基本性能とその帯域通過フィルタへの応用
和田 光司; 大野 貴信; 青木 善浩; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ会
Sep. 2002

コムライン形/インタディジタル形結合線路BPFの伝送特性に関する一検討
和田 光司; 神山 智英; 立見 誠; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2002

各種λ/4共振器の多機能特性とそれらの3段BPFへの適用
和田 光司; 神山 智英; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2002

共振特性改善形λ/4共振器を用いたＢＰＦによる帯域外特性改善に関する検討
和田 光司; 神山 智英; 橋本 修
Oral presentation, Japanese, 電子情報通信学会マイクロ波研究会,マイクロ波研究会
Jun. 2002

帯域外特性改善形λ/4共振器帯域通過フィルタの一設計法
和田 光司; 神山 智英; 橋本 修
Oral presentation, Japanese, 電気学会研究会計測研究会
Jun. 2002

特別講演 2001年アジア・パシフィックマイクロ波会議(APMC2001)報告
馬 哲旺; 川島 宗也; 黒木 太司; 新井 宏之; 和田 光司; 河合 正; 北沢 祥一; 脇野 喜久男
Oral presentation, Japanese, 信学技報
May 2002

A Method for Suppressing Spurious Responses of Bandpass Filters using Open-Ended λ/2 Resonators
K.Wada; T.Ohno; K.Nakagawa; O.Hashimoto
Oral presentation, English, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
May 2002

マイクロ波プレーナフィルタの基礎とその技術動向
和田 光司
Others, Japanese, REALIZEマイクロ波基礎講座, リアライズ社
May 2002

MWE2001会議報告
橋本 修; 和田 光司
Others, Japanese, MWE2001プログラム委員会,電子材料
Apr. 2002

結合線路区間を用いたλ/2共振器BPFによる帯域外特性改善
和田 光司; 中川 浩一; 大野 貴信; 橋本 修
Oral presentation, Japanese, 電子情報通信学会大,エレクトロニクスソサイエティ大会
Mar. 2002

両端接地形λ/2共振器BPFの高調波共振応答改善に関する一検討
和田 光司; 相原 良行; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会,
Mar. 2002

タップ結合共振器の適用によるλ/2結合線路形BPFの特性改善
和田 光司; 中川 浩一; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Mar. 2002

結合線路区間を用いた共振器混在形BPFによる特性改善の一検討
和田 光司; 大野 貴信; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Mar. 2002

λ/２共振器帯域通過フィルタの高調波共振応答改善法
和田 光司; 中川 浩一; 橋本 修; 原田 博司
Oral presentation, Japanese, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
Jan. 2002

An Empirical Study of a Coplanar Bandpass Filter with Transmission Zeros Using Short-Ended Half-Wavelength Resonators
K.Wada; Y.Aihara; O.Hashimoto
Oral presentation, English, エレクトロニクス実装学会,超高速高周波エレクトロニクス実装研究会
2002

両端接地形λ/2共振器BPFの特性改善に関する一検討
和田 光司; 相原良行; 橋本修; 原田博司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2001

素子装荷スタブ共振器を用いた多極化フィルタの一設計法
和田 光司; 山本 靖久; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2001

共振器混在形帯域通過フィルタによる減衰極数制御に関する検討
和田 光司; 大野 貴信; 山本 靖久; 橋本 修; 原田 博司
Oral presentation, Japanese, エレクトロニクス実装学会超高速高周波エレクトロニクス実装研究会,超高速高周波エレクトロニクス実装研究会
Oct. 2001

広帯域高調波共振応答特性を有する両端開放形λ/２共振器BPF
和田 光司; 中川 浩一; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2001

両端接地形λ/２共振器フィルタの帯域外特性改善に関する検討
和田 光司; 相原 良行; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2001

結合線路形フィルタにおける帯域外特性改善に関する検討
和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2001

減衰極数制御形バンドパスフィルタに関する実験的検討
和田 光司; 山本 靖久; 大野 貴信; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2001

素子装荷スタブ共振器を用いた有極形帯域通過フィルタの設計
和田 光司; 山本 靖久; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2001

λ/４共振器帯域通過フィルタの特性改善に関する研究
和田 光司; 神山 智英; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2001

結合位置制御形共振器フィルタを用いたアンテナ共用器に関する一検討
和田 光司; 山本 靖久; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 2001

両端接地形λ/2共振器を用いたフィルタ特性の改善に関する検討
和田 光司; 相原 良行; 橋本 修
Oral presentation, Japanese, 気学会研究会計測研究会
Jun. 2001

共振器混在形帯域通過フィルタの多極化とその小型化に関する検討
和田 光司; 山本 靖久; 橋本 修; 原田 博司
Oral presentation, Japanese, 信学技報
May 2001

[特別講演] 2000年アジア・パシフィックマイクロ波会議出席報告
ペイジョンソク; 和田 光司; 川上 憲司; 黒木 太司; 飯草 恭一; 中條 渉
Oral presentation, Japanese, 信学技報
Apr. 2001

λ/2 共振器 BPF への結合による伝送特性の変化
和田 光司; 中川 浩一; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Apr. 2001

タップ結合の適用による λ/4 共振器 BPF の特性改善
和田 光司; 鈴木 淳之; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Apr. 2001

2段両端開放形λ/２共振器BPFの帯域外特性改善
和田 光司; 中川 浩一; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,総合大会
Mar. 2001

両端接地形λ/２共振器の共振特性改善に関する検討
和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,総合大会
Mar. 2001

2段一端接地形λ/４共振器BPFの多極化に関する検討
和田 光司; 鈴木 淳之; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,総合大会
Mar. 2001

共振器混在形3段BPFの多極化および小型化に関する検討
和田 光司; 山本 靖久; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,総合大会
Mar. 2001

最近のミリ波・サブミリ波デバイスの技術とその応用 2.2.4抵抗皮膜形電波吸収材料
和田 光司
Others, Japanese, 電気学会 電子デバイス技術委員会,電気学会技術報告，第811号
Jan. 2001

λ/4共振器帯域通過フィルタの帯域外特性改善に関する検討
和田 光司; 鈴木 淳之; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Oct. 2000

タップ結合を用いた共振器混在形フィルタの有極特性
和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Oct. 2000

λ/２共振器の高調波共振応答改善法
和田 光司; 中川 浩一; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Oct. 2000

λ/４共振器の高調波共振応答改善法
和田 光司; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Oct. 2000

W帯における斜入射用塗布型電波吸収体に関する検討
和田 光司; 宗 哲; 橋本 修; 鈴木 圭
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Oct. 2000

タップ結合形共振器を用いた高調波共振応答改善法
和田 光司; 中川 浩一; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会研究技術報告,
Aug. 2000

両端開放型λ/2共振器の基本特性とそのフィルタへの適用
和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2000

グランド付きコプレーナ共振器の無負荷Qに関する実験的検討
石田 貴久; 和田 光司; 橋本 修; 原田 博司
Oral presentation, Japanese, 電気学会,全国大会
Mar. 2000

多極特性を有するデュアルバンドフィルタ
和田 光司; 橋本 修
Oral presentation, Japanese, 電子情報通信学会総合大会,総合大会
Mar. 2000

Mechanism of Operation for an Open-Ended Resonator and Its Application to a Microwave Filter
K.Wada; O.Hashimoto
Oral presentation, English, 電子情報通信学会研究技術報告
Feb. 2000

グランド付きコプレーナ線路を用いた両端開放型共振器の無負荷Qの基礎的検討
和田 光司; 石田 貴久; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Nov. 1999

グランド付きコプレーナ導波路を用いた両端開放形共振器の無負荷Q
和田 光司; 石田 貴久; 橋本 修; 原田 博司
Oral presentation, Japanese, 電子情報通信学会,エレクトロニクスソサイエティ大会
Sep. 1999

Calculation of the Q Factors of a CPW Resonator
Xiangying Wu; 粟井 郁雄; 和田 光司; 森吉 健; 木坂 憲太郎
Oral presentation, English, 1999年電子情報通信学会総合大会講演論文集
Mar. 1999

λ/4CPW共振器帯域通過フィルタの小型化および特性改善
和田 光司; 森吉 健; 粟井 郁雄
Oral presentation, Japanese, 1999年電子情報通信学会総合大会講演論文集
Mar. 1999

多極化タップ結合帯域通過フィルタの設計法
和田 光司; 粟井 郁雄
Oral presentation, Japanese, 1999年電子情報通信学会総合大会講演論文集
Mar. 1999

nalysis of Coplanar Waveguide Circuits by Use of the Finite Difference Time Domain Method
Xiangying Wu; K.Wada; I.Awai; H. Tagi; T.Moriyoshi; K.Kisaka
Oral presentation, English, 電子情報通信学会研究技術報告
Jan. 1999

A Half-Wavelength Resonator Bandpass Filter with Multiple Attenuation Poles
K.Wada; I.Awai
Oral presentation, English, 電子情報通信学会研究技術報告
Jan. 1999

インピーダンスステップを有する両端接地形コプレーナ線路共振器の基本特性
和田 光司; 粟井 郁雄; 木坂 憲太郎
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Nov. 1998

一端接地形コプレーナ線路共振器帯域通過フィルタの小型化
和田 光司; 粟井 郁雄; 森吉 健
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Nov. 1998

λ/4CPW共振器帯域通過フィルタの小型化および特性改善
和田 光司; 森吉 健; 粟井 郁雄
Oral presentation, Japanese, 電気情報関連学会中国支部第49回連合大会講演論文集
Oct. 1998

インピーダンスステップを有する両端接地形コプレーナ線路共振器の無負荷Q
和田 光司; 木坂 憲太郎; 粟井 郁雄
Oral presentation, Japanese, 電気情報関連学会中国支部第49回連合大会講演論文集
Oct. 1998

λ/2共振器バンドパスフィルタの帯域外特性改善
和田 光司; 粟井 郁雄
Oral presentation, Japanese, 1998年電子情報通信学会ソサイエティ大会講演論文集
Sep. 1998

コプレーナ線路共振器の小型化
和田 光司; 粟井 郁雄; 木坂 憲太郎; 森吉 健
Oral presentation, Japanese, 1998年電子情報通信学会ソサイエティ大会講演論文集
Sep. 1998

A Bandpass Filter Made of Short-Ended Coplanar Waveguide Resonators with Low Spurious Response
K.Wada; I.Awai; Y.Iwamoto
Oral presentation, English, 電子情報通信学会研究技術報告
Jun. 1998

インピーダンスステップを有するλ/４コプレーナ共振器の無負荷Q
和田 光司; 平澤 明雄; 粟井 郁雄
Oral presentation, Japanese, 1998年電子情報通信学会総合大会講演論文集
Mar. 1998

スプリアス応答抑圧特性を有する両端接地コプレーナ線路共振器フィルタ
岩本 泰生; 和田 光司; 粟井 郁雄
Oral presentation, Japanese, 電気情報関連学会中国支部第48回連合大会講演論文集
Oct. 1997

インピーダンスステップを有するコプレーナ線路共振器の基本特性
和田 光司; 平澤 明雄; 粟井 郁雄
Oral presentation, Japanese, 電気情報関連学会中国支部第48回連合大会講演論文集
Oct. 1997

A Bandpass Filter Made of Coplanar Waveguide Resonators with Impedance Step
K.Wada; I.Awai; N.Takayama
Oral presentation, Japanese, 電子情報通信学会研究技術報告
May 1997

インピーダンスステップを有する両端開放形CPW共振器の基本特性
和田 光司; 高山 信輝; 粟井 郁雄
Oral presentation, Japanese, 1997年電子情報通信学会総合大会
Mar. 1997

タップ励振構造を用いた両端開放形CPW共振器BPF
和田 光司; 粟井 郁雄
Oral presentation, Japanese, 1997年電子情報通信学会総合大会,1997年電子情報通信学会総合大会
Mar. 1997

λ/4コプレーナ線路共振器を用いた帯域通過フィルタ
和田 光司; 粟井 郁雄; 山下康雄
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Nov. 1996

ヘアピン形スロット線路共振器/一端接地形コプレーナ線路共振器および帯域通過フィルタについての検討
和田 光司; 山下 康雄; 粟井 郁雄
Oral presentation, Japanese, 電気情報関連学会中国支部第47回連合大会講演論文集
Oct. 1996

ヘアピン形両端開放形λ/2コプレーナ線路共振器バンドパスフィルタについての検討
和田 光司; 粟井 郁雄
Oral presentation, Japanese, 電気情報関連学会中国支部第47回連合大会講演論文集
Oct. 1996

スロット共振器への給電法および帯域通過フィルタへの応用
岩本 泰生; 和田 光司; 粟井 郁雄
Oral presentation, Japanese, 電気情報関連学会中国支部第47回連合大会講演論文集
Oct. 1996

有極形コプレーナ線路共振器帯域通過フィルタ
和田 光司; 粟井 郁雄
Oral presentation, Japanese, 電子情報通信学会研究技術報告
Jun. 1996

両端接地形コプレーナ線路共振器帯域通過フィルタ
和田 光司; 粟井 郁雄; 野口 泰正
Oral presentation, Japanese, 電気情報関連学会中国支部第46回連合大会講演論文集
Oct. 1995

インタディジタル形コプレーナ線路共振器バンドパス・フィルタの狭帯域化
佐藤 裕美; 和田 光司; 野口 泰正
Oral presentation, Japanese, 1995年電子情報通信学会春季大会
Mar. 1995

コプレーナ線路で構成したトランスバーサル形フィルタ
岩佐 崇浩; 和田 光司; 野口 泰正
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 1995

移動体通信用フィルタのスプリアス応用抑圧法
和田 光司; 野口 泰正; 藤本 英昭; 石井 順也
Oral presentation, Japanese, 1995年電子情報通信学会春季大会
Mar. 1995

新形式の給電部を持つ両端接地形コプレーナ線路共振器バンドパス・フィルタとその広帯域スプリアス応答抑圧特性
野口 泰正; 和田 光司; 中峯 孝範
Oral presentation, Japanese, 1995年電子情報通信学会ソサイエティ大会
1995

両端開放形コプレーナ線路共振器バンドパス・フィルタ
和田 光司; 粟井 郁雄
Oral presentation, Japanese, 1996年電子情報通信学会総合大会
1995

両端接地コプレーナ線路/スロット線路形帯域通過フィルタについての検討
岩本 泰正; 和田 光司; 粟井 郁雄
Oral presentation, Japanese, 1995年電子情報通信学会ソサイエティ大会
1995

狭帯域通過特性を有するインタディジタル形コプレーナ線路共振器バンドパス・フィルタ
和田 光司; 野口 泰正; 岡本 充夫
Oral presentation, Japanese, 1994年電子情報通信学会秋季大会
Sep. 1994

コムライン形コプレーナ線路共振器バンドパス・フィルタ
東野恵理子; 和田 光司; 野口泰正
Oral presentation, Japanese, 1994年電子情報通信学会秋季大会
Sep. 1994

有極形コプレーナ線路共振器バンドパスフィルタ
和田 光司; 石井 順也; 野口 泰正
Oral presentation, Japanese, 1994年電子情報通信学会秋季大会
Sep. 1994

λg0/2共振器形バンドパスフィルタのスプリアス応答とその入力インピーダンス特性
和田 光司; 石井 順他; 野口泰正
Oral presentation, Japanese, 1993年電子情報通信学会秋季大会,
Mar. 1993

λg0/2共振器形バンドパスフィルタのスプリアス応答とその入力インピーダンス特性（その２）
和田 光司; 石井 順也; 野口 泰正
Oral presentation, Japanese, 1993年電子情報通信学会学生大会, 148, p.148, Mar. 1993.
Mar. 1993

λg0/2共振器形バンドパスフィルタのスプリアス応答とその入力インピーダンス特性 (その2)
和田 光司; 石井 順也; 野口 泰正
Oral presentation, Japanese, 1993年電子情報通信学会春季大会
Mar. 1993

スプリアスの少ないμ波フィルタのモデリング
和田 光司; 石井 順他; 野口泰正
Oral presentation, Japanese, 1992年電子情報通信学会春季大会
Mar. 1992

電気電子生命学実験１
2022 - Present
Meiji University

伝送回路論
2022

基礎演習Ｂ
2022

回路システム学第一
2022

回路システム学第二
2022

マイクロ波回路設計特論
2022

電気電子生命学実験１
2021
Meiji University

伝送回路論
2021

基礎演習Ｂ
2021

回路システム学第一
2021

経営実践特論（現役社長の講話）
2021
本年は、授業中に講演（博士課程の学生をEncourageする共同研究）

経営実践特論
2021

回路システム学第二
2021

マイクロ波回路設計特論
2021

電気電子生命学実験１
2020
Meiji University

伝送回路論
2020

基礎演習Ｂ
2020

回路システム学第一
2020

回路システム学第二
2020

Jul. 2000 - Present
エレクトロニクス実装学会

Aug. 1999 - Present
電気学会

Apr. 1999 - Present
電子情報通信学会

チップレス・タグ及びそのタグ情報読み取り回路並びにチップレス・タグシステム
Patent right, 和田光司, 小野哲, 佐川守一, 牧本三夫, 特許7433630, Date registered: 09 Feb. 2024

共振器、ノッチフィルタ、及びＲＦＩＤタグ
Patent right, 和田 光司, 佐川 守一, 牧本 三夫, 特願2016-105497, Date applied: 26 May 2016, The University of Electro-Communications, 特許第6762006号, Date issued: 10 Sep. 2020

伝送線路共振器並びに伝送線路共振器を用いた帯域通過フィルタ、分波器、合成器、帯域阻止フィルタ、高域通過フィルタ、バランス型フィルタ及び低域通過フィルタ
Patent right, 和田光司, 佐川守一, 牧本三夫, 特願2014-508091, Date applied: 29 Mar. 2013, 特許第6112675号, Date issued: 24 Mar. 2017

TRANSMISSION LINE RESONATOR,BAND-PASS FILTER AND BRANCHING FILTER
Patent right, 和田光司, 佐川守一, 牧本三夫, 14/349,873, Date applied: 02 Oct. 2012, US2004/0232482A1, Date announced: 21 Aug. 2014, US9,356,333B2, Date issued: 31 May 2016

伝送線路共振器並びに伝送線路共振器を用いた帯域通過フィルタ、分波器、平衡－不平衡変換器、電力分配器、不平衡－平衡変 換器、周波数混合器及びバランス型フィルタ
Patent right, 和田光司, 佐川守一, 牧本三夫, 特願2012-554868, Date applied: 27 Jan. 2012, WO2012/102385, Date announced: 03 Jul. 2014, 特許第5936133号, Date issued: 20 May 2016

伝送線路共振器、帯域通過フィルタ及び分波器
Patent right, 和田光司, 佐川守一, 牧本三夫, 特願2011-222918, Date applied: 07 Oct. 2011, 特開2013-085076, Date announced: 09 May 2013, 特許第5920868号, Date issued: 22 Apr. 2016

高周波短絡回路（S2013-1239-NO）
Patent right, 佐川守一, 和田光司, 特願2013-154525, Date applied: 25 Jul. 2013, 特開2015-26940

伝送線路共振器並びに伝送線路 共振器を用いた帯域通過フィルタ、バランス型フィルタ、プッシュ－プッシュ発振器及び分波器
Patent right, 和田光司, 佐川守一, 牧本三夫, 特願2011-094480, Date applied: 20 Apr. 2011, 特開2012-227793, Date announced: 15 Nov. 2012

分波回路及びその設計方法
Patent right, 和田光司, 特願2007-534368, Date applied: 31 Aug. 2007, 特許第4734659, Date issued: 13 May 2011

Demultiplexing circuit and its designing method
Patent right, 和田光司, 200680032528.0, Date applied: 31 Aug. 2006, The University of Electro-Communications, ZL200680032528.0, Date issued: 02 Dec. 2009

電気回路、電子回路で広がる無線通信の世界 （出張講義-三島北高校）
Lecturer, 出張講義
25 Sep. 2023 - 25 Sep. 2023

電気通信大学 大学説明会（木更津高専）
Appearance
08 Jul. 2023 - 08 Jul. 2023

第19回産学官連携DAY
Demonstrator, 産学官連携センター
28 Jun. 2023 - 28 Jun. 2023

2023年度電通大AWCC/東工大MCRG共催オープンハウス
Appearance, AWCCと東工大の移動通信研究グループ共催, Others
19 May 2023 - 19 May 2023

秘匿性や対環境特性に優れたチップレスRFIDタグシステム
Appearance, JST, 新技術説明会, Lecture
11 May 2023 - 11 May 2023

大学見学(工学院大学附属高校)
Appearance, アドミッションセンター, 高校生へメッセージ, 電気通信大学, 工学院大学附属高等学校 1年生
08 Dec. 2022 - 08 Dec. 2022

スーパー連携大学院プログラム(現役社長の講話）
Appearance, スーパー連携大学コンソーシアム, 博士課程の学生をEncourageする共同研究, 電気通信大学
08 Sep. 2021

2019年度 第１回ＵＥＣスクール[高大接続教室]講演
Appearance, ワイヤレス通信用の回路実現のおもしろさ！～超小型フィルタの実現～, 電気通信大学
20 Aug. 2019

その他社会活動の実績 経産省 戦略的基盤技術高度化支援事業「革新的ビーム走査方式による26GHz帯UWBレーダの開発」に係る研究開発推進委員会
Others, アドバイザー 年3回
Sep. 2010

生涯学習支援等への貢献 「2010年度版 大学 文系・理系学科案内」（学研 編）
Lecturer, 和田光司,”講座体験フェア－この学科で学ぶもの－ 工学系統"" 電気通信大学 電子通信学部 電子工学科 を紹介
2009 - 2009

生涯学習支援等への貢献 「2009年度版 大学 文系・理系学科案内」（学研 編)
Lecturer, 和田光司,”講座体験フェア－この学科で学ぶもの－ 工学系統"" 電気通信大学 電子通信学部 電子工学科 を紹介
2008 - 2008

生涯学習支援等への貢献 「2008年度版 大学 文系・理系学科案内」（学研 編）
Lecturer, 和田光司,”講座体験フェア－この学科で学ぶもの－ 工学系統"" 電気通信大学 電子通信学部 電子工学科 を紹介
2007 - 2007

技術支援 松下電工解析センター 高周波フィルタ
Advisor, 松下電工解析センター, 松下電工解析センター, company
Apr. 2005

2020年度学生マイ...
2020年度学生マイクロ波回路設計試作コンテストにおいて、和田光司・小野哲研究室の髙橋拓海、宮腰就也（情報・ネットワーク工学専攻博士前期1年）が各々優秀賞を受賞
受賞年月日 2021年03月
2020 - 2020

電子情報通信学会回路...
電子情報通信学会回路とシステム研究会2020年学生優秀賞
荻久保暖香・小野 哲・和田光司（電通大）
"BSTバラクタを装荷した非対称ヘアピン型共振器を用いた結合係数調整が容易なチューナブルBPFとその分波回路への応用"
2020 - 2020

電子情報通信学会回路...
電子情報通信学会回路とシステム研究会2020年学生優秀賞
古谷佳祐・小野 哲・和田光司（電通大）
"不要モード抑制を目的としたEBG構造における等価回路の高精度化及び小型PRGW構造BPFの設計に関する検討"
2020 - 2020