XIAO FENGCHAO
| Department of Computer and Network Engineering | Professor |
| Cluster II (Emerging Multi-interdisciplinary Engineering) | Professor |
| Center for Space Science and Radio Engineering | Professor |
Researcher Information
Field Of Study
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Measurement engineering
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Communication and network engineering
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Electronic devices and equipment
Educational Background
- Oct. 1995 - Mar. 1999
The University of Electro-Communications, Graduate School of Electro-Communications, Communication and System - Aug. 1987 - Dec. 1989
Tsinghua University, Graduate School, Microwave Techniques and Elctromagnetic Field - Aug. 1982 - Jul. 1987
Tsinghua University, Faculty of Engineering, Department of Electronic Engineering, China
Research Activity Information
Award
- Jan. 2024
IEEE CASS JJC Best Student Awardを受賞, およびIEEE CASS JJC Best Student Awardを受賞。【論文題目】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 【著者】成島 章太、和田 光司、肖 鳳超。2024年１月25日（木）に東海大学湘南キャンパスで開催された電子情報通信学会 回路とシステム（CAS）研究会において2023年の学生優秀賞および、同研究会を協賛しているIEEE CAS Society Japan Joint Chapter（IEEE CASS JJC）よりBest Student Awardを受賞しました。 学生優秀賞は、回路とシステム研究会が学会、研究会の活性化を目的に、学生による優秀な研究会発表に対して同研究会開催あたり１件程度、年５件程度を目安に学生の発表から学生優秀賞として表彰されます。 さらにBest Student Awardは、学生優秀賞授与された中で最も優秀であった発表１件に対して、IEEE CASS JJCより表彰されます。
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 CASS JJC Best Student Award
International academic award - Jan. 2024
回路とシステム研究会学生優秀賞を受賞, 成島章太さん（和田研）が回路とシステム研究会学生優秀賞およびIEEE CASS JJC Best Student Awardを受賞。【論文題目】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 【著者】成島 章太、和田 光司、肖 鳳超。2024年１月25日（木）に東海大学湘南キャンパスで開催された電子情報通信学会 回路とシステム（CAS）研究会において2023年の学生優秀賞および、同研究会を協賛しているIEEE CAS Society Japan Joint Chapter（IEEE CASS JJC）よりBest Student Awardを受賞しました。 学生優秀賞は、回路とシステム研究会が学会、研究会の活性化を目的に、学生による優秀な研究会発表に対して同研究会開催あたり１件程度、年５件程度を目安に学生の発表から学生優秀賞として表彰されます。 さらにBest Student Awardは、学生優秀賞授与された中で最も優秀であった発表１件に対して、IEEE CASS JJCより表彰されます。
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
回路とシステム研究会学生優秀賞
Japan society - Mar. 2023
電子情報通信学会機構デバイス研究会
マルチプローブ方式による電磁界分布可視化のためのEBG電波吸収に関する基礎研究
機構デバイス研究会若手優秀賞(大学院部門), 酒見 健人(共著者;萓野 良樹;上 芳夫;肖 鳳超) - Sep. 2021
IEICE
電子情報通信学会通信ソサイエティより活動功労賞
International society - Dec. 2020
2020 International Conference on Emerging Technologies for Communications （ICETC2020）
Improvement of Maximum Transmission Efficiency and Misalignment Robustness by Using Electron-ring Shaped Coil for Wireless Power Transfer
ICETC2020 Student Presentation Award
International society - Jun. 2016
JIEP
JPCA Show 2016にてアカデミックプラザ賞を受賞
International society - Sep. 2015
IEICE
電子情報通信学会通信ソサイエティより活動功労賞
International society - Aug. 2015
2015 IEEE International Symposium on Electromagnetic Compatibility
An experimental study of electrostatic discharge immunity testing for wearable devices
Symposium Best Paper Award Honorable Mention
International society - Jul. 2015
電子情報通信学会環境電磁工学研究会
A surrogate model based algorithm for near-field reconstruction
電子情報通信学会環境電磁工学研究会奨励賞 - May 2014
2014 International Symposium on Electromagnetic Compatibility, Tokyo
Measurement of complex near magnetic field by using 6-port network
Young Research Award
International society - Jul. 2012
電子情報通信学会環境電磁工学研究会
広帯域ハイブリッドを使用した6ポート回路の複素電磁界測定の適用
電子情報通信学会環境電磁工学研究会奨励賞 - Feb. 2012
IEICE
“6ポート回路網を用いた回路基板近傍の複素電磁界測定法,” IEICE和文論文誌B
学生優秀論文賞を受賞 - Jul. 2011
電子情報通信学会環境電磁工学研究会
グラウンドスリットと平行なマイクロストリップ線路の伝送特性
電子情報通信学会環境電磁工学研究会奨励賞 - Jul. 2010
電子情報通信学会環境電磁工学研究会
複素領域における近傍電磁界測定法の提案
電子情報通信学会環境電磁工学研究会奨励賞
Paper
- Study on Design of Bend Differential-Paired Lines With Low Common-Mode Noise Using Topology Optimization
H. Komatsu; Y. Kayano; T. Yamagiwa; Y. Kami; F. Xiao
Proc. EMC Japan/APEMC Okinawa, 24-27, May 2024, Peer-reviwed
International conference proceedings, English - Study on Crosstalk and Mode Conversion of Two Pairs of Differential-Paired Lines with Different Distances
H. Komiya; Y. Kayano; Y. Kami; F. Xiao; H. Ueyama; N. Iida
Proc. EMC Japan/APEMC Okinawa, 338-341, May 2024, Peer-reviwed
International conference proceedings, English - Experimental Study on Common Mode Choke for Conductive Noise Reduction from Differential Line to Ground
H. Ueyama; N. Iida; Y.Kayano; F. Xiao; Y. Kami
Proc. EMC Japan/APEMC Okinawa, 453-456, May 2024, Peer-reviwed
International conference proceedings, English - Wide Band Experimental Extraction Method for Primary and Secondary Parameters of Shielded-FPC
T. Yamagiwa; Y. Kayano; H. Inoue; Y. Kami; F. Xiao
IEICE Transactions on Communications (Japanese Edition), J107-B, 3, 271-275, 01 Mar. 2024, Peer-reviwed, False
Scientific journal, Japanese - Quantitative Representation of Frequency Dispersion of Primary Parameters Caused by Thin Conductive Shield and Correspondence to Shielding Effectiveness of Near Magnetic Field
T. Yamagiwa; Y. Kayano; Y. Kami; F. Xiao; H. Inoue
IEICE Transactions on Communications (Japanese Edition), 1-10, 09 May 2023, Peer-reviwed
Scientific journal, Japanese - Multi-Objective Design of EMI Filter with Uncertain Parameters by Preference Set-based Design Method and Polynomial Chaos Method
BUI Duc Chinh; Yoshiki KAYANO; Fengchao XIAO; Yoshio KAMI
IEICE Transactions on Communications, Institute of Electronics, Information and Communications Engineers (IEICE), 2023, Peer-reviwed
Scientific journal - Experimental extraction method for primary and secondary parameters of shielded-flexible printed circuits
T. Yamagiwa; Y. Kayano; Y. Kami; F. Xiao
IEICE Trans. Electron., vol. E105-C, no. 8, pp. 913-922, Aug. 2022, Peer-reviwed
Scientific journal, English - Improvement of Maximum Transmission Efficiency and Misalignment Robustness by Using Electron-ring Shaped Coil for Wireless Power Transfer
K. Chhou; Y. Kayano; F. Xiao; Y. Kami
2020 International Conference on Emerging Technologies for Communications, B2-3, 1-4, Dec. 2020, Peer-reviwed
International conference proceedings, English - Evaluation method of voltage and current distributions on asymmetrical and equi-length differential-paired lines
Y. Kayano; Y. Kami; F. Xiao
IEICE Trans. Electron., vol. E103-C, no. 11, pp. 597-604, Nov. 2020, Peer-reviwed
Scientific journal, English - EMI filter with attenuation pole for differential paired-lines and its design by PSD
Y. Kayano; F. Xiao; Y. Kami
2020 International Symposium on Electromagnetic Compatibility, 7-12, Sep. 2020, Peer-reviwed
International conference proceedings, English - Design method of very small dipole element on LiNbO3 substrate for optical E-field sensor
K. Tajima; Y. Akiyama; Y. Kayano; F. Xiao
2020 IEEE International Symposium on Electromagnetic Compatibility & Signal/Power Integrity, 680-684, Aug. 2020, Peer-reviwed
International conference proceedings, English - Experimental evaluation of spatial resolution for optical electric field sensor with dipole element
K. Tajima; Y. Akiyama; Y. Kayano; F. Xiao
2020 IEEE International Symposium on Electromagnetic Compatibility & Signal/Power Integrity, 685-687, Aug. 2020, Peer-reviwed
International conference proceedings, English - 選好度付きセットベースデザイン手法を用いた2層型電波吸収体の多目的満足化設計
萓野良樹; 上芳夫; 肖鳳超
IEICE Trans. Electro., (in Japanese), vol. J103-C, no. 5, pp. 257-260, May 2020, Peer-reviwed
Scientific journal, Japanese - 電源–グラウンドプレーン上に発生する電圧変動の近似式の一検討
川上 雅士; 萓野 良樹; 肖 鳳超; 上 芳夫; 戸花 照雄; 秋元 浩平; 礒田 陽次
IEICE Trans. Electro., (in Japanese), vol. J103-C, no. 5, pp. 266-269, May 2020, Peer-reviwed
Scientific journal, Japanese - Multi-objective design of transmission line referenced to meshed ground planes by preference set-based design
K. Matsuishi; Y. Kayano; F. Xiao; Y. Kami
2019 International Symposium on Electromagnetic Compatibility, O_We_B_4_4, Sep. 2019, Peer-reviwed
International conference proceedings, English - Multi-objective design of EMI filter for differential paired-lines by preference set-based design
Y. Kayano; Y. Kami; H. Ishikawa; F. Xiao; H. Inoue
2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific EMC Symposium Sapporo, FriAM2B.2, Jun. 2019, Peer-reviwed
International conference proceedings, English - Secondary parameters for transmission line of periodic line width
K. Matsuishi; Y. Kayano; F. Xiao; Y. Kami
2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific EMC Symposium Sapporo, FriAM1B.4, Jun. 2019, Peer-reviwed
International conference proceedings, English - 選好度付きセットベースデザイン手法を用いたEMIフィルタの多目的設計
萓野良樹; 川上雅士; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
IEICE Trans. Electro., (in Japanese), vol. J102-C, no. 5, pp. 166-169, May 2019, Peer-reviwed
Scientific journal, Japanese - 磁界プローブを用いた自動車室内のポインティングベクトル推定
福井伸治; 深川康弘; 溝口幸; 前田登; 肖鳳超; 上芳夫
IEICE Trans. Commun., (in Japanese), vol. J102-B, no. 3, pp. 265-272, Mar. 2019, Peer-reviwed
Scientific journal, Japanese - 選好度付セットベースデザイン手法を用いた伝送線路型フィルタの設計法
萓野良樹; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
IEICE Trans. Commun., (in Japanese), vol. J102-B, no. 3, pp. 237-247, Mar. 2019, Peer-reviwed
Scientific journal, Japanese - An alternative air discharge test method using ESD generator in contact discharge mode
T. Ishida; F. Xiao; Y. Kami; O. Fujiwara; S. Nitta
IEEJ Transactions on Fundamentals and Materials, vol. 138, no. 11, pp. 555-561, Nov. 2018, Peer-reviwed
Scientific journal, English - Design of transmission line with impedance resonator for negative group delay and slope characteristics by preference set-based design method
Yoshiki Kayano; Yoshio Kami; Haruo Ishikawa; Fengchao Xiao; Hiroshi Inoue
2018 International Conference on Electronics Packaging and iMAPS All Asia Conference, ICEP-IAAC 2018, Institute of Electrical and Electronics Engineers Inc., 170-175, 06 Jun. 2018, In the design of electric and electronic devices, it is required to pursue a solution which satisfies simultaneously multi-objective performances sometimes including conflicting requirements. This paper newly attempt to propose a concurrent design method for a multi-objective satisfactory design method, Preference Set-Based Design (PSD), to a transmission line (TL) with impedance resonators for realizing negative group delay and slope characteristics. The TL is consisted of four different resonators with different resonant frequency. The design parameters of the TL are obtained in ranges by PSD. The validity of the design parameters is demonstrated by numerical modeling.
International conference proceedings, English - Electromagnetic field measurements for analysis of wave propagation around automobile
F. Xiao; Y. Kami
IEEE International Symposium on Electromagnetic Compatibility and Asia-Pacific EMC Symposium2018 (IEEE EMC & APEMC 2018), Singapore, MO-PM-II-WS-06, May 2018, Peer-reviwed
International conference proceedings, English - Analysis of electromagnetic wave in automotive cabin using complex Poynting's theorem
S. Fukui; N. Maeda; F. Xiao; Y. Kami
IEEE International Symposium on Electromagnetic Compatibility and Asia-Pacific EMC Symposium2018 (IEEE EMC & APEMC 2018), Singapore, pp. 331-335, May 2018, Peer-reviwed
International conference proceedings, English - A study on design of differential-paired lines with meander delay line by preference set-based design method
Y. Kayano; Y. Kami; H. Ishikawa; F. Xiao; H. Inoue
IEEE International Symposium on Electromagnetic Compatibility and Asia-Pacific EMC Symposium2018 (IEEE EMC & APEMC 2018), Singapore, pp. 536-541, May 2018, Peer-reviwed
International conference proceedings, English - Application of the Preference Set-based Design Method to Bent Differential-Paired Lines
Y. Kayano; Y. kami; H. Ishikawa; F. Xiao; H. Inoue
IEICE Trans. Electro., (in Japanese), vol. J101-C, no. 5, pp. 233-244, May 2018, Peer-reviwed
Scientific journal, Japanese - Modelling of transmission line loaded with BCI probe using circuit concept approach
K. Murano; M. Hoshino; Y. Kami; F. Xiao; and M; Tayarani
2017 International Symposium on Electromagnetic Compatibility, (EMC EUROPE 2017), Angers, France, O_Th_C1-2, Sep. 2017, Peer-reviwed
International conference proceedings, English - Fast evaluation of transmission characteristics of wiring harnesses using the RLGC parameter
F. Xiao
2017 Asia-Pacific EMC Symposium (APEMC 2017), Korea, TU-AM-2-3, Jun. 2017, Peer-reviwed
International conference proceedings, English - Investigation on characteristic impedance of transmission line in meshed-ground flexible printed circuit
Y. Zhu; F. Xiao; X. Sun; Y. Kayano; Y. Kami
2017 Asia-Pacific EMC Symposium (APEMC 2017), Korea, WE-PM-9-16, 151-153, Jun. 2017, Peer-reviwed
International conference proceedings, English - Comparison of transmission line susceptibility between BCI test and plane wave illumination
K. Murano; Mi. Hoshino; M. Tayarani; F. Xiao; Y. Kami
IEICE Trans. Commun., (in Japanese), vol. J100-B, no. 3, pp. 199-204, Mar. 2017, Peer-reviwed
Scientific journal, Japanese - An alternative air discharge test in contact discharge of ESD generator through fixed gap
Takeshi Ishida; Fengchao Xiao; Yoshio Kami; Osamu Fujiwara; Shuich Nitta
IEEE International Symposium on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers Inc., 2016-, 46-50, 19 Sep. 2016, Peer-reviwed, It is notable that the air discharge method specified in the International Eelectrotechnical Commission (IEC) standard provides unstable testing reproducibility. In this paper, to achieve stable testing reproducibility, we proposed an alternative air discharge test method using an electrostatic discharge (ESD) generator in contact discharge mode. Measurements of air discharge currents through a fixed gap to sphere or conical electrodes in view of various metal curvatures inside equipment covered with a non-conductive case were conducted with respect to different gap lengths from 1 mm to 6 mm, and their current peaks and rise time were investigated in conjunction with the statistical variations. Comparison with air discharge current waveforms was also made to reveal better testing repeatability for the proposed method.
International conference proceedings, English - Theoretical analysis of BCI test system using circuit concept approach
Kimitoshi Murano; Naoki Takata; Misaki Hoshino; Yoshio Kami; Fengchao Xiao; Majid Tayarani
IEEE International Symposium on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers Inc., 2016-, 600-603, 19 Sep. 2016, Peer-reviwed, In a bulk current injection test (BCI test), an electric current is injected into a wire harness connected to an electronic equipment. Since this test setup can be considered as a transmission line exposed to an external electromagnetic field, the relation of the line voltage and current is expressed by a modified telegrapher's equation. This paper reveals an analytical method of the BCI-test system using the circuit concept approach, and its effectiveness is experimentally verif ed. Furthermore, the difference between the susceptibility of transmission line exposed to the plane-EM field and that under the BCI test is shown as an example.
International conference proceedings, English - Application of the Preference Set-based Design to Layout of the Microstrip Line on Board Edge with RLGC Meta Modeling
Kazuya Nagao; Masashi Kawakami; Yoshio Kami; Raruo Ishikawa; Fengchao Xiao
2016 ASIA-PACIFIC INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (APEMC), IEEE, WE-AM-II-TC10-4, (#1570239892), 601-604, 2016, Peer-reviwed, Multi-objective optimization methods are applied to solve various issues in fields of not only mechanical engineering but also management, medicine, etc. Preference set-based design (PSD) method is one of them and has been successfully applied in the mechanical engineering field. We have discussed the utility when applying the PSD method to solve various electrical and electronics problems. In this study, the layout design problem for microstrip line (MSL) placed on a board edge to satisfy required performances is investigated. When applying the PSD method to the problem, a meta-modeling with a response surface methodology (RSM) to determine RLGC parameters of the MSL is proposed, and then the validity is discussed.
International conference proceedings, English - Prediction of the Electromagnetic Radiation from Coupled Differential Microstrip Pairs Due to Skew and Imbalance
Fengchao Xiao; Kimitoshi Murano; Yoshio Kami
2016 ASIA-PACIFIC INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (APEMC), IEEE, TH-AM-II-SS14-5, (#1570239959), 683-686, 2016, Peer-reviwed, In this work, based on the mode decomposition technique and the far-field Green's function, an analytical solution of the radiated electric field from coupled traces is formulated by taking both the common and differential-mode currents into consideration. The analytical solution of the radiated electric field is further used to predict the EMI from differential microstrip pairs with time-domain input signals having different slew rates and different amount of skew. From the results, it is possible to quantify the relative impact of these two sources of imbalance on EMI.
International conference proceedings, English - An Alternative Air Discharge Test in Contact Discharge of ESD Generator Through Fixed Gap
Takeshi Ishida; Fengchao Xiao; Yoshio Kami; Osamu Fujiwara; Shuich Nitta
2016 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC), IEEE, 46-50, 2016, Peer-reviwed, It is notable that the air discharge method specified in the International Eelectrotechnlcal Commission (IEC) standard provides unstable testing reprodudbility. In this paper, to achieve stable testing reprodudbllity, we proposed an alternative air discharge test method using an electrostatic discharge (ESD) generator in contact discharge mode. Measurements of air discharge currents through a fixed gap to sphere or conical electrodes in view of various metal curvatures inside equipment covered with a non-conductive case were conducted with respect to different gap lengths from 1 mm to 6 mm, and their current peaks and rise time were investigated in conjunction with the statistical variations. Comparison with air discharge current waveforms was also made to reveal better testing repeatability for the proposed method.
International conference proceedings, English - Theoretical Analysis of BCI Test System Using Circuit Concept Approach
Kimitoshi Murano; Naoki Takata; Misaki Hoshino; Yoshio Kami; Fengchao Xiao; Majid Tayarani
2016 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC), IEEE, 600-603, 2016, Peer-reviwed, In a hulk current injection test (BCI test), an electric current is injected into a wire harness connected to an electronic equipment. Since this test setup can he considered as a transmission line exposed to an external electromagnetic f eld, the relation of the line voltage and current is expressed by a modifed telegrapher's equation. This paper reveals an analytical method of the BCI-test system using the circuit concept approach, and its effectiveness is experimentally verifed. Furthermore, the difference between the susceptibility of transmission line exposed to the plane-EM fold and that under the BCI test is shown as an example.
International conference proceedings, English - Characteristics of Discharge Currents Measured through Body-Attached Metal for Modeling ESD from Wearable Electronic Devices
Takeshi Ishida; Fengchao Xiao; Yoshio Kami; Osamu Fujiwara; Shuichi Nitta
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E99B, 1, 186-191, Jan. 2016, Peer-reviwed, To investigate electrostatic discharge (ESD) immunity testing for wearable electronic devices, the worst scenario i.e., an ESD event occurs when the body-mounted device approaches a grounded conductor is focused in this paper. Discharge currents caused by air discharges from a charged human through a hand-held metal bar or through a semi-sphere metal attached to the head, arm or waist in lieu of actual wearable devices are measured. As a result, it is found that at a human charge voltage of 1 kV, the peak current from the semi-sphere metal is large in order of the attachment of the waist (15.4A), arm (12.8A) and head (12.2A), whereas the peak current (10.0A) from the hand-held metal bar is the smallest. It is also found that the discharge currents through the semi-sphere metals decrease to zero at around 50 ns regardless of the attachment positions, although the current through the hand-held metal bar continues to flow at over 90 ns. These discharge currents are further characterized by the discharge resistance, the charge storage capacitance and the discharge time constant newly derived from the waveform energy, which are validated from the body impedance measured through the hand-held and body-mounted metals. The above finding suggests that ESD immunity test methods for wearable devices require test specifications entirely different from the conventional ESD immunity testing.
Scientific journal, English - Enhancement Phenomena and Mechanism Elucidation from Equivalent Circuit for Discharge Current through Small Gap in Contact Discharge of Electrostatic Generator
Ishida Takeshi; Xiao Fengchao; Kami Yoshio; Fujiwara Osamu; Nitta Shuichi
IEEJ Transactions on Fundamentals and Materials, The Institute of Electrical Engineers of Japan, 136, 6, 341-346, 2016, Peer-reviwed, In electrostatic discharge (ESD) immunity tests specified by the international electrotechnical commission (IEC), it has been learned empirically that a contact discharge test sometimes provides a severe test result even under the same test level. This is said to be due to the existence of small air gaps between an ESD generator and equipment under test. To clarify the phenomena, we previously measured discharge currents through small air gaps from 30 µm to 1000 µm in contact discharges of an ESD generator to an IEC current calibration target, which revealed that multiple current peaks appear depending on the gap length and test voltage as well. It was also demonstrated that the contact discharge current with a small gap provides a faster rise time and larger current peak in comparison with normal contact discharge tests even at the same test voltage. In this study, to explain these findings quantitatively, we proposed a simplified circuit model combined with a spark-resistance formula which allows one to analyze the discharge currents through the above-mentioned air gaps in 8 kV contact discharge tests. As a result, we found that the calculated waveforms in contact discharges with/without a gap fairly agree with the measured results. It was also found that the proposed circuit provides roughly the same dependence of current peaks on a gap length as the measured results.
Scientific journal, Japanese - Application of the preference set-based design method to filter design
Masashi Kawakami; Yoshio Kami; Haruo Ishikawa; Fengchao Xiao
IEEJ Transactions on Fundamentals and Materials, Institute of Electrical Engineers of Japan, 136, 10, 621-628, 2016, Peer-reviwed, Electrical design is usually made with the concepts based on the electric circuit theory. Nowadays it needs to consider the electromagnetic (EM) fields generated in devices, components, and equipment to achieve their expected performances and satisfy the electromagnetic compatibility (EMC) regulations as well. In such kind of design, it is required to pursue a solution which satisfies simultaneously multi-objective performances sometimes including conflicting requirements. In this paper, the application of a multi-objective satisfactory design method to electrical design is discussed. The method, named preference set-based design (PSD), is developed as a concurrent design method in the field of mechanical engineering. As a first application to electric and electronic fields, the method is applied to filter designs and its validity is discussed. Applied filter is an ordinary five-order low-pass filter composed of plural element parameters and objectives or performances of attenuation characteristics. In practical cases, some design uncertainties should be taken into account, for example an unnecessary magnetic fields coupling between inductors. Design solution expressed in terms of point value cannot easily and effectively handle the design uncertainties since there is no theoretical guarantee that the solution converges in such case. Such an uncertainty problem is treated in this study. By using the resultant parameter sets, the attenuation characteristics are analyzed and confirmed whether the required performances are satisfied.
Scientific journal, Japanese - An experimental study of electrostatic discharge immunity testing for wearable devices
Takeshi Ishida; Shuichi Nitta; Fengchao Xiao; Yoshio Kami; Osamu Fujiwara
IEEE International Symposium on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers Inc., 2015-, 839-842, 10 Sep. 2015, Peer-reviwed, Wearable electronic devices have proliferated in recent years. Since such devices are used by attaching to a human, every time the human is electrically charged or discharged, the electric potential of such a wearable device abruptly changes. Thus the device is exposed in close proximity to the resultant transient electromagnetic fields, which may cause malfunctions in the device. Electrostatic discharge (ESD) immunity test methods that assume this situation are not yet developed in the present international standards. In this study, to investigate such ESD immunity testing, we considered the worst case as an ESD event which occurs when the body-mounted wearable device approaches a grounded conductor. In lieu of actual devices, we measured discharge currents caused by air discharges from a charged human through a hand-held metal bar or through a semi-sphere metal attached to the head, arm or waist. As a result, we found that at a human charge voltage of 1 kV, the peak current from the semi-sphere metal is large in order of the attachment of the waist (15.4 A), arm (12.8 A) and head (12.2 A), whereas the peak current (10.0 A) from the hand-held metal bar is the smallest. It was also found that the discharge currents from the semi-sphere metal decrease at around 50 ns regardless of the attachment positions, however, the current from the handheld metal bar continues to flow at over 90 ns. This suggests that ESD immunity testing for wearable devices needs different specifications of test equipment and test method from the conventional testing.
International conference proceedings, English - Analysis of transmission line loaded with BCI probe using circuit concept approach
K. Murano; N. Takata; M. Tayarani; F. Xiao; Y. Kami
IEICE Commun. Express, The Institute of Electronics, Information and Communication Engineers, vol. 4, no. 7, pp. 223-227, Jul. 2015, Peer-reviwed, Bulk current injection (BCI) test is adopted as an immunity testing method for automotive electronic equipment. In this letter, an analytical method for obtaining the terminal output of the transmission line excited by using the BCI probe is proposed. The test setup is analytically solved by using a circuit concept approach because it is considered to be a transmission line externally excited by an electromagnetic field. To confirm the validity of the proposed method, a single-ended transmission line loaded with the BCI probe is considered as an example. The comparison with the analytical solution and our experimental results shows a good agreement.
Scientific journal, English - Generation method and basic properties of rotating FSK-EM field for radiated immunity / susceptibility evaluation of electronic equipment
Kimitoshi Murano; Fengchao Xiao; Majid Tayarani; Yoshio Kami
IEEJ Transactions on Fundamentals and Materials, Institute of Electrical Engineers of Japan, 135, 5, 294-295, 01 May 2015, Peer-reviwed, Recently our EM environment is becoming more and more complicated increasingly. To investigate the immunity/susceptibility performance of electronic equipments in such an environment, basic properties of a digitally modulated rotating EM field (rotating DM-EM field) are discussed as an incident EM field on the equipment and a method to generate the rotating DM-EM field is introduced. In this paper, an FSK modulated rotating-EM field (rotating FSK-EM field) is examined as an example and two dimensional rotation of the FSK-EM field at 1 Hz is confirmed by experiment.
Scientific journal, Japanese - A Source Model and Experimental Validation for Electromagnetic Noises from Electrostatic Discharge Generator
Takeshi Ishida; Yukihiro Tozawa; Mutsumu Takahashi; Fengchao Xiao; Yoshio Kami; Osamu Fujiwara; Shuichi Nitta
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E98B, 2, 317-323, Feb. 2015, Peer-reviwed, Electrostatic discharge (ESD) generators cause electromagnetic (EM) noises not only at ESD tests but also even before and after the tests. This may provide inconsistent test results, but the mechanism has not been well examined. To explain the mechanism qualitatively, we investigated a generation source model of EM noises from an ESD generator in conjunction with the functional control sequences of built-in relay switches and the DC high voltage power supply. To validate this model, we used a magnetic field probe to measure the induced EM noises before, during, and after contact and air discharges in accordance with the corresponding timing of the functional control sequences. As a result, we confirmed that the EM noises are induced when the relay switches operate before and at ESD testing and after ESD tests for both contact and air discharges. In addition, we found that the noise peaks due to contact discharges increase with charge voltages, and the peaks just before and at the testing are relatively larger than the ones after the tests, while the peaks of the induced noises at the air discharge testing do not always increase with charge voltages, but reach a maximum at 3 kV. In addition, the peaks of the induced noises at the air discharge testing become smaller than either the peaks just before the testing and those after the tests at charge voltages above 6 kV. This suggests that the EM noises just before ESD testing and after the test may cause the EUT to malfunction when air discharge tests with charge voltages over 6 kV are conducted. A new control sequence of the built-in relay switch was also proposed for reducing the EM noises after ESD tests, which was validated through noise measurements.
Scientific journal, English - Analytical Solution of the Electromagnetic Radiation from Coupled Differential Microstrip Pairs
Fengchao Xiao; Kimitoshi Murano; Yoshio Kami
2015 ASIA-PACIFIC INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (APEMC), IEEE, SS16.4, 708-711, 2015, Peer-reviwed, Nowadays differential traces as interconnects are extensively used since the electromagnetic radiation can be ideally cancelled by the out-of-phase and same amplitude signals on the two tightly coupled differential traces. However, the ability of differential pair in mitigating EM interference (EMI) may be seriously jeopardized by possible unbalance of the excitation, since both the common mode and the differential mode current may introduced to the differential pair. In this work, based on the mode decomposition technique and the far-field Green's function, an analytical solution of the radiated electric field from coupled traces is formulated by taking both the common and differential-mode currents into consideration. Thus the radiated electric field from any arbitrary excitation can be easily calculated. The validity of the analytical formulation is verified by comparing the calculated results with the full-wave simulation results.
International conference proceedings, English - Analysis of Transmission Characteristics for Twisted Pair Cables Using the RLGC Parameters of the Cable
Mitsutaku Yamamura; Yoshio Kami; Kimitoshi Murano; Fengchao Xiao
2015 ASIA-PACIFIC INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (APEMC), IEEE, TS19.1, 720-723, 2015, Peer-reviwed, As automotive electronics have increased, models for predicting the transmission characteristics of wiring harnesses, suitable for the automotive EMC tests, are needed. In this paper, the repetitive structures of the cross-sectional shape of the twisted pair cable is focused on. By taking account of RLGC parameters, a theoretical analysis modeling for whole cables, based on multi-conductor transmission line theory, is proposed. Furthermore, the theoretical values are compared with measured values and a full-wave simulator. In case that a twisted pitch, a length of the cable, and a height of reference ground plane are changed, the validity of the proposed model is confirmed.
International conference proceedings, English - An Experimental Study of Electrostatic Discharge Immunity Testing for Wearable Devices
Takeshi Ishida; Shuichi Nitta; Fengchao Xiao; Yoshio Kami; Osamu Fujiwara
2015 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC), IEEE, 839-842, 2015, Peer-reviwed, Wearable electronic devices have proliferated in recent years. Since such devices are used by attaching to a human, every time the human is electrically charged or discharged, the electric potential of such a wearable device abruptly changes. Thus the device is exposed in close proximity to the resultant transient electromagnetic fields, which may cause malfunctions in the device. Electrostatic discharge (ESD) immunity test methods that assume this situation are not yet developed in the present international standards. In this study, to investigate such ESD immunity testing, we considered the worst case as an ESD event which occurs when the body-mounted wearable device approaches a grounded conductor. In lieu of actual devices, we measured discharge currents caused by air discharges from a charged human through a hand-held metal bar or through a semi-sphere metal attached to the head, arm or waist. As a result, we found that at a human charge voltage of 1 kV, the peak current from the semi-sphere metal is large in order of the attachment of the waist (15.4 A), arm (12.8 A) and head (12.2 A), whereas the peak current (10.0 A) from the hand-held metal bar is the smallest. It was also found that the discharge currents from the semi-sphere metal decrease at around 50 ns regardless of the attachment positions, however, the current from the handheld metal bar continues to flow at over 90 ns. This suggests that ESD immunity testing for wearable devices needs different specifications of test equipment and test method from the conventional testing.
International conference proceedings, English - An Application of the Preference Set-based Design Method to Filter Designs
Masashi Kawakami; Haruo Ishikawa; Yoshio Kami; Fengchao Xiao
2015 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC), IEEE, 1315-1318, 2015, Peer-reviwed, Electrical design is usually made with the concepts based on electric circuit theory. Nowadays it needs to consider the electromagnetic (EM) field generated in devices, components, and equipment to achieve their expected performances and satisfy the electromagnetic compatibility (EMC) regulations as well. In such kind of design, EM-fiel simulators are often used to estimate EM-fieIl effects to circuit performances. In this paper, the application of a multi-objective satisfactory design method to electrical design is discussed. The method, named preference set-based design (PSD), is developed as a concurrent design method in a fiel of mechanical engineerings. The PSD method is a sort of synthesis technique to optimize multi purposes concurrently. As a firs model to electric and electronics fields the method is applied to filte designs and its usefulness is discussed. Applied filter are an ordinary f ve-order low-pass filte and an electromagnetic interference (EMI) filte composed of plural element parameters and objectives or performances of attenuation characteristics. In practical cases, some unclear parameters should be taken into account, for example a terminal load in some range, and a coupling coefficien in a common-mode chock for EMI filte. Such an uncertainty problem is treated in this study. By using the resultant parameter sets, the attenuation characteristics are analyzed and confirme whether the performances are satisfie with the required performances.
International conference proceedings, English - Measurements and Phenomenon Study on Discharge Currents with Small Gap in Electrostatic Discharge Immunity Test
Ishida Takeshi; Xiao Fengchao; Kami Yoshio; Fujiwara Osamu; Nitta Shuichi
IEEJ Transactions on Fundamentals and Materials, The Institute of Electrical Engineers of Japan, 135, 5, 287-293, 2015, Peer-reviwed, In electrostatic discharge (ESD) immunity tests, it has empirically been known that contact discharge currents are enhanced by the existence of small air gaps between an ESD generator and equipment under test; however, its mechanism has not been well examined so far. In this study, to clarify the phenomena, we measured discharge currents through small air gaps from 30 µm to 1 000 µm in contact discharges of an ESD generator to an IEC current calibration target. As a result, we found that multiple current peaks appear depending on the gap length and test voltage as well, which are unlikely to occur in conventional contact discharge tests. It was also found that the contact discharge current with a small gap provides a faster rise time and larger current peak in comparison with normal contact discharge tests even at the same test voltage. A circuit approach was used to qualitatively explain the peculiar finding and revealed that the stray capacitances of the discharge electrode are first charged by a contact discharge test and then the accumulated charges are abruptly discharged due to the spark that occurs across a small gap, which gives faster rise time and larger current peaks.
Scientific journal, Japanese - Measurement of complex near magnetic fields by using 6-port network
Masashi Kawakami; Takayuki Nambu; Yoshio Kami; Fengchao Xiao; Kimitoshi Murano
IEEE International Symposium on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers Inc., 2014-, 521-524, 23 Dec. 2014, In order to investigate the generation and propagation mechanism of electromagnetic interference (EMI), near electro-magnetic (EM) fields have been measured. In many cases, magnitude of the fields is often measured. But if we can measure the fields in complex domain (magnitude and phase), we can get more information of EMI. we discuss the basic concept for the 6-port network used here, and then the network with 90° and 180° hybrid circuits are proposed. We compare the results by using the proposed network and by a vector network analyzer (VNA).
International conference proceedings, English - Modeling of differential line across a ground slot
Fengchao Xiao; Yoshio Kami
IEEE International Symposium on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers Inc., 2014-, 322-325, 23 Dec. 2014, Transmission characteristics of a differential line across a ground slot is investigated. The ABCD parameter s for a differential line with a slot n the ground pane are described and an equivalent transmission line model in terms of the effective mode characteristic impedances and the propagation constants is proposed. The validity of the approach is confirmed through comparison with different test examples.
International conference proceedings, English - Modeling of differential line referenced to a meshed ground plane
Fengchao Xiao; Kimitoshi Murano; Yoshio Kami
IEEE International Symposium on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers Inc., 735-740, 20 Oct. 2014, Peer-reviwed, Meshed power and ground planes are quite common in flexible printed circuit board (PCB) and also found primarily in the multi-layered low temperature co-fired ceramic substrate. Transmission characteristics of a differential line referenced to a meshed ground plane is investigated in this work. The ABCD parameters for the differential line referenced to a meshed ground plane are described and an equivalent transmission line model in terms of the effective mode characteristic impedances and the effective mode propagation constants is proposed. The validity of the approach is confirmed through comparison with different test examples.
International conference proceedings, English - Reconstruct the near-field pattern from limited measurements based on compressed sensing
F. Xiao; Y. Kami
IEICE Commun. Express, vol. 3, no. 7, pp. 206-210, Jul. 2014, Peer-reviwed
Scientific journal, English - Modeling of Differential Line Across a Ground Slot
Fengchao Xiao; Yoshio Kami
2014 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, TOKYO (EMC'14/TOKYO), IEEE, 322-325, 2014, Peer-reviwed, Transmission characteristics of a differential line across a ground slot is investigated. The ABCD parameters for a differential line with a slot in the ground plane are described and an equivalent transmission line model in terms of the effective mode characteristic impedances and the propagation constants is proposed. The validity of the approach is confirmed through comparison with different test examples.
International conference proceedings, English - Measurement of Complex Near Magnetic Fields by Using 6-port Network
Masashi Kawakami; Takayuki Nambu; Yoshio Kami; Fengchao Xiao; Kimitoshi Murano
2014 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, TOKYO (EMC'14/TOKYO), IEEE, 521-524, 2014, Peer-reviwed, In order to investigate the generation and propagation mechanism of electromagnetic interference (EMI), near electro-magnetic (EM) fields have been measured. In many cases, magnitude of the fields is often measured. But if we can measure the fields in complex domain (magnitude and phase), we can get more information of EMI. we discuss the basic concept for the 6-port network used here, and then the network with 90. and 180. hybrid circuits are proposed. We compare the results by using the proposed network and by a vector network analyzer (VNA).
International conference proceedings, English - Modeling of Differential Line Referenced to a Meshed Ground Plane
Fengchao Xiao; Kimitoshi Murano; Yoshio Kami
2014 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC EUROPE), IEEE, 735-740, 2014, Peer-reviwed, Meshed power and ground planes are quite common in flexible printed circuit board (PCB) and also found primarily in the multi-layered low temperature co-fired ceramic substrate. Transmission characteristics of a differential line referenced to a meshed ground plane is investigated in this work. The ABCD parameters for the differential line referenced to a meshed ground plane are described and an equivalent transmission line model in terms of the effective mode characteristic impedances and the effective mode propagation constants is proposed. The validity of the approach is confirmed through comparison with different test examples.
International conference proceedings, English - Six-port based wave correlator with application to micro-displacement measurement
N. Iwaki; F. Xiao; T. Yakabe
Progress In Electromagnetics Research Symp. (PIERS 2013), Taibei, Taiwan, pp. 1005-1008, Mar. 2013, Peer-reviwed
International conference proceedings, English - Characterization of differential line across a ground slit
Y. Konishi; K. Murano; Y. Kami; F. Xiao
5th Pan-Pacific EMC Joint Meeting, Tokyo, Japan, pp. 61-64, Nov. 2012, Peer-reviwed
International conference proceedings, English - A Measurement Method of Complex Near Electromagnetic Field on PCBs by Using 6-port Technique
T. Takatsu; K. Murano; Y. Kami; F. Xiao
IEICE Trans. Commun., (in Japanese), The Institute of Electronics, Information and Communication Engineers, vol. J94-B, no. 2, pp. 285-292, Feb. 2012, Peer-reviwed, 回路基板(PCB)近傍の複素電磁界測定のための回路網と磁界測定結果について述べている.6ポート回路技術とはべクトルネットワークアナライザ構成法の一つであり,出力ポートにおける電力のスカラ量測定により入力ポートに接続された試料の散乱行列の要素を複素数で推定する技術である.本論文ではこの技術を近傍電磁界測定法に応用している.すなわち被測定の電磁界はプローブで観測することを前提にすると,これは等価電源で考えることができる.回路論的には,2個の入力ポートと4個の出力ポートからなる6ポート回路網を考え,出力ポートでの電力測定から,2個の入力ポートの電源(被測定電磁界)をそれらの振幅比と位相差として評価する手法である.提案する回路網を用いてPCB上の磁界を測定し,良好な結果を得ている.
Scientific journal, Japanese - Complex near electromagnetic field scanning on printed circuit board
Fengchao Xiao; Toshihiro Takatsu; Kimitoshi Murano; Yoshio Kami
IEEE International Symposium on Electromagnetic Compatibility, A5-2, 2012, Peer-reviwed, In this paper, a new measurement system for scanning the complex near field on a printed circuit board (PCB) is proposed. The measurement is based on the 6-port technique. The measurement results of the proposed measurement system and the measured results directly by using a VNA agree well, which confirmed the validity of the proposed measurement system. © 2012 IEEE.
International conference proceedings, English - Noise coupling from single-ended or differential signaling to nearby power trace
F. Xiao; Y. Kami
XXX URSI General Assembly and Scientific Symposium (URSI GASS 2011), Istanbul, Turkey, E11-2, Aug. 2011, Peer-reviwed
International conference proceedings, English - A new method for measuring of complex near electromagnetic field on PCB
T. Takatsu; K. Murano; F. Xiao; Y. Kami
2011 Asia-Pacific EMC Symposium (APEMC 2011), Jeju, Korea, T-We2-1, May 2011, Peer-reviwed
International conference proceedings, English - Crosstalk analysis of sufficiently separated two sets of coupled trace pair over ground split
S. Torigoe; F. Xiao; Y. Kami
2011 Asia-Pacific EMC Symposium (APEMC 2011), Jeju, Korea, T-We4-3, May 2011, Peer-reviwed
International conference proceedings, English - Evaluation of prototype MMIC six-port wave correlator based VNA
T. Yakabe; K. Hirose; H. Matsuura; K. Fujii; F. Xiao
2010 Asia-Pacific Radio Science Conference, (AP-RASC’10), Toyama, Japan, p. 254, Sep. 2010, Peer-reviwed
International conference proceedings, English - A proposal of complex electromagnetic field measurement method
T. Takatsu; F. Xiao; K. Murano; Y. Kami
4th Pan-Pacific EMC Joint Meeting, Sendai, Japan, pp. 35-38, May 2010, Peer-reviwed
International conference proceedings, English - Analytical Approach for Crosstalk Characterization of Multiconductor Transmission Lines Using Mode Decomposition Technique in the Time Domain
SangWook Park; Fengchao Xiao; Yoshio Kami
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 52, 2, 436-446, May 2010, Peer-reviwed, Crosstalk between lossless multiconductor lines is analyzed using a mode decomposition technique in the time domain. An approach that mode voltages and currents at an arbitrary point along the lines are expressed in terms of the initially incident mode sources and the mode reflection coefficients is proposed. The results obtained by the approach offer insight into how each mode component influences the crosstalk waveform. A SPICE equivalent circuit is also developed based on the approach. The validity of our approach and the SPICE model is investigated by comparing the results with those from fast Fourier transform simulations.
Scientific journal, English - AN X-BAND MMIC SIX-PORT CORRELATOR BASED VECTOR NETWORK ANALYZER
T. Yakabe; K. Hirose; H. Matsuura; K. Fujii; F. Xiao
2010 CONFERENCE ON PRECISION ELECTROMAGNETIC MEASUREMENTS CPEM, IEEE, 714-+, 2010, Peer-reviwed, This paper describes an MMIC six-port correlator based vector network analyzer (VNA). The MMIC six-port correlator was fabricated using hybrid couplers and integrated diode power detectors. The performance of the six-port correlator and the constructed X-band VNA was evaluated, and the measurement accuracy was confirmed.
International conference proceedings, English - New Radiated Immunity/Susceptibility Test Method Using Rotating FM-EM Field
Kimitoshi Murano; Majid Tayarani; Fengchao Xiao; Yoshio Kami
2010 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC 2010), IEEE, 189-193, 2010, Peer-reviwed, A new radiated radio-frequency immunity test method using a frequency-modulated rotating electromagnetic field (rotating FM-EM field) is described. By using the field as an incident-EM field in an immunity test, the immunity characteristics of an equipment under test for a polarization angle of the field with time-varying frequency spectra can be easily obtained. In this paper, a generation method and basic characteristics of the rotating FM-EM field for the radiated immunity test are clarified. Moreover, measured susceptibility of an FM receiver is shown as an example.
International conference proceedings, English - Measurement for complex magnetic fields
M. Kawakami; F. Xiao; K. Murano; Y. Kami
2009 Int. Symp. Electromagnetic Compatibility (EMC'09 Kyoto), Kyoto, Japan, pp. 49-52, Jul. 2009, Peer-reviwed
International conference proceedings, English - Analytical Solution for Two Parallel Traces on PCB in the Time Domain with Application to Hairpin Delay Lines
Fengchao Xiao; Kimitoshi Murano; Yoshio Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E92B, 6, 1953-1959, Jun. 2009, Peer-reviwed, In this paper the time-domain analysis of two parallel traces is investigated. First, the telegrapher's equations for transmission line are applied to the parallel traces on printed circuit board (PCB), and are solved by using the mode decomposition technique. The time-domain solutions are then obtained by using the inverse Laplace transform. Although the Fourier-transform technique is also applicable for this problem, the solution is given numerically. Contrarily, the inverse Laplace transform successfully leads to an analytical expression for the transmission characteristics. The analytical expression is represented by series, which clearly explains the coupling mechanism. The analytical expression for the fundamental section of a meander delay line is investigated in detail. The analytical solution is validated by measurements, and the characteristics of the distortions in the output waveforms of meander delay lines due to the crosstalk are also investigated.
Scientific journal, English - Crosstalk Analysis for Embedded-Line Structure at PCB Using Circuit-Concept Approach
Sang-Wook Park; Fengchao Xiao; Yoshio Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E92B, 6, 1945-1952, Jun. 2009, Peer-reviwed, An analytical method for estimating coupling between microstrip lines in arbitrary directions on adjacent layers in multi-layer printed circuit boards is studied: one line is embedded and the other is on the surface layer. Coupling or crosstalk has been estimated by development of a circuit-concept approach based on modified telegrapher's equations of the Agrawal approach instead of the Taylor approach for some computational advantages. Electromagnetic fields from the embedded microstrip line and the microstrip line on the Surface can be obtained by using the electric image method for dielectric substrates. To verify the proposed approach, we conducted some experiments and compared the results of our approach with those of measurement and a commercial electromagnetic solver.
Scientific journal, English - Time-domain crosstalk analysis of multiconductor transmission lines using mode-decomposition technique
S. W. Park; F. Xiao; D. C. Park; Y. Kami
2009 Korea-Japan Joint Conference on AP/EMC/EMT, (KJJC-AP/EMC/EMT 2006), Incheon, Korea, pp. 143-146, May 2009, Peer-reviwed
International conference proceedings, English - Mode-Port-Network Approach to Analyze Power-Line EMC Problems for PLC
Yoshio Kami; Fengchao Xiao; Kimitoshi Murano
2009 20TH INTERNATIONAL ZURICH SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, IEEE, 73-+, 2009, Peer-reviwed, In Japan, a power-line communication (PLC) is in use as an indoor system in the frequency band of 2 MHz to 30 MHz. However, the radiated emission in this frequency band, which is caused by the common-mode current generated in the power-line systems, is a serious matter. To analyze the high-frequency behavior of the line system, a two-port-network model using differential- and common-mode ports is proposed here. As an example, the network-function expression is effectively used to analyze characteristics such as longitudinal conversion loss (LCL), induced common-mode currents in a power line having a load circuit, and an impedance stabilization network 1 (ISN1) attached to a PLC modem.
International conference proceedings, English - Transmission line theory in EMC: its theory and application
Y. Kami; F. Xiao
Tutorials of 20th Int. Zurich Symp. Electromagnetic Compatibility, Zurich, Switzerland, pp. 333-357, Jan. 2009, Peer-reviwed
International conference proceedings, English - 多層基板での直交するストリップ線路間及びマイクロストリップ線路間の集中キャパシタンスモデル
K. Araki; F. Xiao; Y. Kami
IEICE Trans. Commun., (in Japanese), The Institute of Electronics, Information and Communication Engineers, vol. J91-B, no. 12, pp. 1701-1710, Dec. 2008, Peer-reviwed, 電子機器で使用される多層基板において,異なる層(隣接層)にある直交している線路間の結合(クロストーク)を表現する簡単な回路モデルを提案している.基本的な線路系として,2枚のグランド層内聞の隣接層で直交配線された2本のストリップ線路間,共通グランド層の多層基板で隣接層に直交配線された2本の埋込型マイクロストリップ線路間,埋込型と表面層上で構成する2本のマイクロストリップ線路間の3種を取り上げている.直交している線路間では電界結合,回路論的にはキャパシタンス結合で発生するものである.各種線路が作る電界,結果的には電位を電気影像法で求め,等価な分布相互キャパシタンスを導出している.分布相互キャパシタンスが交差している付近に集中することを理論的に示し,これを集中等価相互キャパシタンスとして近似するモデルとそのキャパシタンス評価法を提案し,このモデルの妥当性を実験から検証している.
Scientific journal, Japanese - Simplified Interference Coupling Model for Two Orthogonal Striplines on Adjacent Layers
Kenji Araki; Fengchao Xiao; Yoshio Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E91B, 12, 3983-3989, Dec. 2008, Peer-reviwed, To evaluate frequency-domain interference between orthogonally intersecting stripline geometries, a lumped mutual capacitance was incorporated into a circuit model, and then it simplified circuit was proposed in the previous paper. The circuit model was approximated from an investigation of the distribution Of Mutual capacitance but it has remained how the capacitance is approximated. In this paper, a technique using an error function is proposed for the problem. Then, the time-domain response in,in analytical expression is studied using the simplified circuit model in it Laplace transformation to make the mechanism clear. Comparing the experimental and the computed results verifies the proposed models.
Scientific journal, English - Time-domain analysis of two parallel traces on PCB
F. Xiao; M. Ikeda; K. Murano; Y. Kami
Proc. Pan-Pacific EMC Joint Meeting, (PPEMC'08), Musashino Tokyo, Japan, 15S1-2., May 2008, Peer-reviwed
International conference proceedings, English - Crosstalk analysis between microstrip lines intersecting in arbitrary directions on adjacent layers in multi-layer PCB
S. W. Park; S. Matsuda; F. Xiao; Y. Kami
Proc. Pan-Pacific EMC Joint Meeting, (PPEMC'08), Musashino Tokyo, Japan, 16S4-4, May 2008, Peer-reviwed
International conference proceedings, English - New Radiated RF Immunity/Susceptibility Test Method Using RF-pulsed Rotating-EM Field
Kimitoshi Murano; Majid Tayarani; Fengchao Xiao; Yoshio Kami
2008 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, VOLS 1-3, IEEE, 393-+, 2008, Peer-reviwed, A new radiated radio-frequency (RF) immunity/susceptibility test method using an RF-pulsed rotating-electromagnetic (EM) field is proposed. Controlling the pulse width can generate the RF-pulsed signal having an arbitrary bandwidth. By using such RF-pulsed rotating-EM field as an incident-EM field of the immunity/susceptibility test, it is possible to easily investigate the immunity-weak points of electronic equipments. In this paper, the basic characteristics of the RF-pulsed rotating-EM field an! clarified. Moreover, some susceptibility characteristics of a cavity with a slit measured by using the RF-pulsed rotating-EM field are shown as an example.
International conference proceedings, English - Modeling Interference Coupling Between Two Orthogonal Strip Lines on Adjacent Layers
Kenji Araki; Fengchao Xiao; Yoshio Kami; Hemant Bishnoi; James L. Drewniak
2008 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC EUROPE), IEEE, 302-307, 2008, Peer-reviwed, In multi-layer circuit boards of modern electronic equipment, signal lines and power distribution traces can be set orthogonally and sandwiched between two reference layers. To evaluate interference between such a intersecting strip line geometry, a lumped mutual capacitance model is proposed. Determining the scalar potential due to an assumed line charge at the intersection of the orthogonal traces leads to the distributed mutual capacitance between two lines. The results show that for typical printed circuit board geometries, the mutual capacitance can be approximated as a lumped element at the intersection of the two orthogonal strip line geometries. The proposed model is verified by comparing experimental and the computed results.
International conference proceedings, English - 直交する2重ストリップ線路の回路網モデル
K. Araki; F. Xiao; Y. Kami
IEICE Trans. Commun., (in Japanese), The Institute of Electronics, Information and Communication Engineers, vol. J90-B, no. 11, pp. 1106-1115, Nov. 2007, Peer-reviwed, 電子機器で使用される多層基板において,バスラインを2枚のグランド層間に挟んで直交に配線する方式におけるクロストーク問題を解析するための回路網モデルを考察している.このモデルでは線路断面構造は上下面がグランド面で,線路の位置が中央にない非対称なストリップ線路である.このような線路が直交している場合のクロストーク問題を検討するために,TEMモードの条件下において一方の線路が作る電界が他方の線路に影響を与えるとして,4ポート回路網表示を求めている.このときの電界は電気影像法を用いて,ストリップ線路が非対称な構造であるので線電荷が作る電位から解析関数で求めている.この電位を線路端子での電圧と電流で表現し,最終的に縦続行列形の4ポート回路網を得ている.更に,この系での結合モデルでの分布相互キャパシタンスを評価し,そのほとんどが交差点に集中していることを定量的に明らかにし,集中相互キャパシタンスで表現するモデルを提案している.これらの回路モデルは実験モデルの測定値から検証を行っている.
Scientific journal, Japanese - How to formulate multiple transmission lines having discontinuities < Circuit-concept approach >
S. W. Park; F. Xiao; Y. Kami; D. C. Park
2007 IEEE EMC Symposium (IEEE EMC-2007), Honolulu, Hawaii, CD-ROM, MO-PM-WS-19, Aug. 2007, Peer-reviwed
International conference proceedings, English - Circuit model of two bent traces in arbitrary directions on a PCB
S. W. Park; F. Xiao; Y. Kami; D. C. Park
Progress In Electromagnetics Research Symp. (PIERS 2007), Prague, Czech Republic, p. 232, Aug. 2007, Peer-reviwed
International conference proceedings, English - Time domain crosstalk characteristics between single-ended and differential lines
Fengchao Xiao; Ryota Hashimoto; Kimitoshi Murano; Yoshio Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E90B, 6, 1305-1312, Jun. 2007, Peer-reviwed, The crosstalks between a single-ended line and a differential pair in parallel are analyzed using telegrapher's equations for multiconductor lines. The crosstalk from the single-ended trace to the differential pair is estimated at shunt-arm resistors in T or H termination networks. The analysis is conducted by incorporating the termination conditions with the solution of the telegrapher's equations. The time-domain characteristics of the crosstalk are obtained by using the fast inverse Laplace transform. The measurements are conducted easily by using a single-ended digital oscilloscope since the crosstalk is evaluated on the shunt-arm resistors. Both the calculated and measured results are presented, and the characteristics of the crosstalk are also investigated qualitatively.
Scientific journal, English - Crosstalk analysis method for two bent lines on a PCB using a circuit model
Sang Wook Park; Fengchao Xiao; Dong Chul Park; Yoshio Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E90B, 6, 1313-1321, Jun. 2007, Peer-reviwed, We propose a method of crosstalk analysis for two bent transmission lines with vias at both ends on a PCB using a circuit-concept approach in the quasi-static condition. In this condition, the electromagnetic fields can be approximately estimated by the quasi-static terms of the accurate Green's function in an inhomogeneous medium. Thus we obtain a circuit model in an ABCD matrix by taking account of the fields generated by a longitudinal line and a vertical via on a PCB. To verify the proposed approach, we conducted some experiments and compared our approach's results with measured results and a commercial electromagnetic solver's results.
Scientific journal, English - Application of rotating-EM field to four-septum TEM cell for radiated immunity/susceptibility test
Kimitoshi Murano; Hiroko Kawahara; Fengchao Xiao; Majid Tayarani; Yoshio Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E90B, 6, 1322-1328, Jun. 2007, Peer-reviwed, A new radio-frequency (RF) radiated immunity/susceptibility test method using four-septum TEM cell is proposed. A rotating-EM field can be generated inside the cell by feeding four-different RF DSB-SC signals to four septa arranged in the cell. Since a polarization plane of the rotating-EM field rotates in a low speed, the immunity/susceptibility test for the EM field with various polarizations can be conducted more easily. In this paper, a technique for generating the rotating-EM field in the cell is investigated. The basic characteristics of the cell and the rotating-EM field by using the technique are clarified. To verify the validity of this test method, a RF radiated susceptibility of a printed Circuit board is measured. The measured results are verified by comparing with the theoretical results based on modified telegrapher's equations.
Scientific journal, English - Crosstalk analysis for two bent lines using circuit model
Sang Wook Park; Fengchao Xiao; Dong Chul Park; Yoshio Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E90B, 2, 323-330, Feb. 2007, Peer-reviwed, The crosstalk phenomenon, wich occurs between transmission lines, is caused by electromagnetic fields of currents flowing through the lines. Crosstalk between two bent lines is studied by using a set of solutions of modified telegrapher's equations. By expressing electromagnetic fields in terms of voltages and currents in the line ends, the resultant network function in the form of an ABCD matrix is obtained. Electromagnetic fields caused by currents flowing in risers at transmission line ends are taken into account in addition to those fields in line sections. The validity of the proposed approach was confirmed by comparing experimental results with computed results and those simulated by a commercial electromagnetic solver for some bent-line models.
Scientific journal, English - Analysis of crosstalk between single-ended and differential lines
F. Xiao; R. Hashimoto; K. Muran; Y. Kami
PIERS 2007 BEIJING: PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM, PTS I AND II, PROCEEDINGS, ELECTROMAGNETICS ACAD, 1667-+, 2007, Peer-reviwed, The crosstalk between single-ended and differential lines is investigated in this paper. First, the telegraphers equations for multiconductor line are applied. Then the differential pair is terminated respectively with T and II termination networks, and the crosstalk from the single-ended trace to the differential pair is evaluated at the grounded resistors in the T or II termination networks. The analysis of the crosstalk is obtained by incorporating the termination network with the solution of the telegraphers equations that are solved by using a mode decomposition technique.
International conference proceedings, English - New radiated immunity/susceptibility test method using four-septum TEM cell: Measurements and field analysis
Kimitoshi Murano; Hiroko Kawahara; Majid Tayarani; Fengchao Xiao; Yoshio Kami
2007 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY: WORKSHOP AND TUTORIAL NOTES, VOLS 1-3, IEEE, 719-+, 2007, Peer-reviwed, A four-septum TEM cell has been proposed as a new radiated radio-frequency immunity/susceptibility test device. The cell provides electromagnetic fields rotating at a very low rate by generating a two sets of balanced-mode fields orthogonally. In this paper, a test method using the cell is clarified, and susceptibility characteristics of two types of microstripline models are investigated to verify the effectiveness of the cell and a role of dielectric material is made clear. In addition, an analysis method of the internal electromagnetic fields, which are different from those used in an ordinary TEM cell, is discussed using a image method.
International conference proceedings, English - Modeling and analysis of crosstalk between differential lines in high-speed interconnects
F. Xiao; Y. Kami
PIERS 2007 PRAGUE: PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM, PROCEEDINGS, ELECTROMAGNETICS ACAD, 488-+, 2007, Peer-reviwed, The crosstalk between a single-ended line and a differential pair, and between differential pairs are investigated in this paper. First, the telegrapher's equations for multiconductor line are applied. Then the telegrapher's equations are solved by using the mode decomposition technique. Finally the mixed-mode S-parameters are derived to investigate the crosstalk and mode conversion.
International conference proceedings, English - LCL characteristics of parallel transmission line with load circuit
Yasunori Oguri; Kimitoshi Murano; Fengchao Xiao; Yoshio Kami
2007 4TH INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY PROCEEDING: EMC 2007, IEEE, 126-+, 2007, Peer-reviwed, In Japan, a power-line communication (PLC or PLT) system was approved only as an in-house system. One of concerned matters is leakage electromagnetic fields from power lines, which are mainly caused by common-mode currents. The common-mode current should be estimated under a condition of LCL (Longitudinal Conversion Loss) of 16 dB in the Japanese rule. In this paper, the characteristics of LCL are discussed at an input terminal of two-parallel line, which is modeled after a simple inhouse power line, with unbalanced load circuit on a viewpoint of transmission-line theory. By applying an equivalent expression concerning common and differential modes at outlet terminals, the analysis is developed.
International conference proceedings, English - Circuit model for two parallel microstrip lines on slotted ground plane
Hitoshi Naggakubo; Kimitoshi Murano; Fengchao Xiao; Yoshio Kami
2007 4TH INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY PROCEEDING: EMC 2007, IEEE, 130-+, 2007, Peer-reviwed, A transmission-characteristic analysis of two parallel microstrip lines on PCB with a slotted ground plane is studied. When two trace lines are very closed, crosstalk occurs between them. In addition to it, magnetic-field coupling between the traces and the slot line also exists. In this paper, a circuit model for transmission characteristics of such line system is proposed. The calculated results are compared with the experimental results to veryfy the proposed model.
International conference proceedings, English - ABCD network function for analysis of crosstalk between microstrip lines in arbitrary directions on different layers
SangWook Park; Fengchao Xiao; DongChul Park; Yoshio Kami
2007 4TH INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY PROCEEDING: EMC 2007, IEEE, 134-+, 2007, Peer-reviwed, A method for the analysis of crosstalk between two microstrip lines in arbitrary directions lying on different layers is proposed using a circuit-concept approach. Electromagnetic fields in a PCB substrate due to microstrip lines are estimated by using an image method and then those are applied to transmission line theory. To verify the proposed approach, we compared the results of our approach with those of a commercial electromagnetic solver.
International conference proceedings, English - Crosstalk analysis model for traces crossing split ground plane and its reduction by stitching capacitor
Fengchao Xiao; Yohei Nakada; Kimitoshi Murano; Yoshio Kami
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS, SCRIPTA TECHNICA-JOHN WILEY & SONS, 90, 8, 26-34, 2007, Peer-reviwed, Crosstalk and its reduction by using stitching capacitors for traces crossing split ground plane are investigated in this paper. While two traces cross the same slot in the ground plane, the crosstalk between them will be of very high level, even if they are far apart. By examining the measured S-pararneter and near-magnetic field, we concluded that the crosstalk is due to magnetic or inductive coupling between the trace and the slot in the ground. We therefore developed an equivalent Circuit model for characterizing the crosstalk. The validity of the equivalent circuit model is verified by comparison with measurement results. The reduction of crosstalk by stitching the split ground plane with capacitors is discussed on the basis of the developed equivalent circuit model. (c) 2007 Wiley Periodicals, Inc.
Scientific journal, English - Crosstalk analysis model for traces crossing split ground plane and its reduction by stitching capacitor
Fengchao Xiao; Yohei Nakada; Kimitoshi Murano; Yoshio Kami
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS, SCRIPTA TECHNICA-JOHN WILEY & SONS, 90, 8, 26-34, 2007, Peer-reviwed, Crosstalk and its reduction by using stitching capacitors for traces crossing split ground plane are investigated in this paper. While two traces cross the same slot in the ground plane, the crosstalk between them will be of very high level, even if they are far apart. By examining the measured S-pararneter and near-magnetic field, we concluded that the crosstalk is due to magnetic or inductive coupling between the trace and the slot in the ground. We therefore developed an equivalent Circuit model for characterizing the crosstalk. The validity of the equivalent circuit model is verified by comparison with measurement results. The reduction of crosstalk by stitching the split ground plane with capacitors is discussed on the basis of the developed equivalent circuit model. (c) 2007 Wiley Periodicals, Inc.
Scientific journal, English - Crosstalk estimated at terminal-load circuits of differential-mode line excited by single-ended line
S. Toyama; F. Xiao; K. Murano; Y. Kami
IEICE Trans. Electron., (in Japanese), The Institute of Electronics, Information and Communication Engineers, vol. J89-C, no. 11, pp. 894-901, Nov. 2006, Peer-reviwed, グランド面を有する3本のパターン線路が平行であるとき,1本がシングルエンド励振線路で,2本がディファレンシャルモード用線路であるときのクロストーク問題を取り上げている.ディファレンシャルモード用線路の終端がTまたはII型負荷回路であるとき,負荷回路で不平衡型測定器で観測されるクロストーク問題を取り扱うために回路網方程式を検討している.平行な3本線路での電信方程式をモード分解法で解き,これによる回路網方程式に負荷回路を含ませた回路網方程式に発展させている.最後に,実験結果と比較することによってこの解析手法を検証している.
Scientific journal, Japanese - Methods to reduce coupling between traces over split ground and power planes
F. Xiao; Y. Kami
Symposium on Electromagnetic Compatibility, (EMC EUROPE 2006), Barcelona, Spain, pp. 525-530, Sep. 2006, Peer-reviwed
International conference proceedings, English - Equivalent two-port network for indoor outlet and its application
Y. Kami; F. Xiao
Symposium on Electromagnetic Compatibility, (EMC EUROPE 2006), Barcelona, Spain, pp. 420-425, Sep. 2006, Peer-reviwed
International conference proceedings, English - Immunity/susceptibility tests based on slowly rotating EM-fields
F. Xiao; K. Murano; Y. Kami
2006 Korea-Japan Joint Conference on AP/EMC/EMT, (KJJC-AP/EMC/EMT 2006), Kanazawa, Japan, pp. 185-188, Sep. 2006, Peer-reviwed
International conference proceedings, English - Common- and differential-mode components at asymmetric pattern-layout lines on PCB
Y. Kami; F. Xiao
Progress In Electromagnetics Research Symp. (PIERS 2006), Tokyo, Japan, p. 84, Aug. 2006, Peer-reviwed
International conference proceedings, English - Crosstalk analysis of two bent lines above a ground plane
S. W. Park; F. Xiao; D. C. Park; Y. Kami
Progress In Electromagnetics Research Symp. (PIERS 2006), Tokyo, Japan, p. 87, Aug. 2006, Peer-reviwed
International conference proceedings, English - A vector network analyzer based on six-port technology with an ultimate calibration method
T. Yakabe; H. Kondo; F. Xiao
6th Asia-Pacific Engineering Research Forum on Microwaves and Electromagnetic Theory, Fudan University, Shanghai, China, pp. 233-237, Aug. 2006
International conference proceedings, English - A vector network analyzer based on six-port technology with an ultimate calibration method
T. Yakabe; H. Kondo; F. Xiao
IJMOT [Online], vol. 1, no. 2, pp. 309-314, Aug. 2006, Peer-reviwed
Scientific journal, English - Analysis of coupling between two bent transmission lines by a circuit-concept approch
Sang Wook Park; Fengchao Xiao; Dong Chul Park; Yoshio Kami
CEEM' 2006: ASIA-PACIFIC CONFERENCE ON ENVIRONMENTAL ELECTROMAGNETICS, VOLS 1 AND 2, PROCEEDINGS, IEEE, 736-+, 2006, Peer-reviwed, The crosstalk of two bent transmission lines of arbitrary directions have been analyzed by a circuit concept approach. The results for the circuit concept approach, HFSS and measurements are in very good agreement. The derived equations can be expected to be easily applied them for analyzing crosstalk of a various kind of bent transmission lines in printed circuit board.
International conference proceedings, English - A Generation Method of Rotating-EM Field Using Four-Septum TEM Cell and Its Basic Characteristics
Kimitoshi Murano; Majid Tayarani; Hiroko Kawahara
2006 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, VOLS 1-3, PROCEEDINGS, IEEE, 565-568, 2006, Peer-reviwed, A new kind of TEM cell having four septa (Four-septum TEM cell) is studied. By applying different DSB-SC signals to the four septa, a rotating-EM field can be generated inside the four-septum TEM cell and the field would be used as an incident-EM field for RF radiated immunity/susceptibility test. In this paper, a generation method of the rotating-EM field in the four-septum TEM cell is studied and the basic characteristics of the field generated inside the cell is examined experimentally.
International conference proceedings, English - Crosstalk characteristics between single-end and differential-mode lines
S. Toyama; K. Murano; F. Xiao; Y. Kami
Proc. 2005 Korea-Japan Microwave Workshop, (KJMW2005), Busan, Korea, pp. 107-110, Oct. 2005, Peer-reviwed
International conference proceedings, English - Line equations in chain-matrix expression for a single bent line and two bent parallel lines
Y. Kami; F. Xiao
Proc. 2005 International Symposium on Antennas and Propagation, (ISAP2005), Seoul, Korea, pp. 11-14, Aug. 2005, Peer-reviwed
International conference proceedings, English - A vector network analyzer based on six-port technology with an ultimate calibration method
T. Yakabe; H. Kondo; F. Xiao
Proc. 10th International Symposium Microwave and Optical Technology, (ISMOT'2005), Fukuoka, Japan, pp. 223-226, Aug. 2005, Peer-reviwed
International conference proceedings, English - A new generation method of slowly rotating-EM fields for radiated immunity/susceptibility test
K Murano; M Tayarani; FC Xiao; Y Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E88B, 8, 3133-3139, Aug. 2005, Peer-reviwed, A new generation method of rotating electromagnetic fields (rotating-EM fields) for radio frequency (RF) radiated immunity/susceptibility test and its basic characteristics are described. Two different double-side-band suppressed-carrier (DSB-SC) signals are required for generating the slowly rotating-EM field for the immunity/susceptibility test. These DSB-SC signals are generated by a DSB-SC-signal generator based on the new concept which consists of voltage-variable attenuators, bi-phase switches, a direct-digital synthesizer and a micro processor. Using the DSB-SC-signal generator, the DSB-SC signal of arbitrary RF frequency can be generated more easily than the conventional system. In this paper, the principle of the DSB-SC signal generator and the basic characteristics of the DSB-SC signals generated by the generator are clarified. The measured basic characteristics of the rotating-EM field generated using the new concept are shown and it is confirmed that the field can be applied for the RF immunity/susceptibility test. In addition, the susceptibility test of an equipment under test is made as an example, the validity of our proposed system is established.
Scientific journal, English - Design of a four-septum TEM cell for immunity/susceptibility test
FC Xiao; Y Suganuma; K Murano; M Tayarani; Y Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E88B, 8, 3146-3151, Aug. 2005, Peer-reviwed, The four-septum transverse electromagnetic (TEM) cell is like the traditional TEM cell but has four plate-like septa in the internal space. A slowly rotating field can be easily generated in the four-septum TEM cell, thus radiated immunity/susceptibility characteristics of an EUT under arbitrary specific polarizations can be measured without rearranging the test setup. A design approach for the four-septum TEM cell is discussed in this paper. The characteristics of the cell are analyzed based on the telegrapher's equation and decomposition of the transmission mode into four independent modes. Then a design approach is given based on the analytical results. A prototype of the four-septum TEM cell based on the design is constructed and the characteristics of the prototype cell are experimentally evaluated. The validity and effectiveness of the design approach are confirmed.
Scientific journal, English - Characteristics of electrically long two-conductor lines with inhomogeneous media
O Makino; FC Xiao; Y Kami
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E88B, 7, 3028-3035, Jul. 2005, Peer-reviwed, Crosstalk or coupling phenomenon between two parallel conductors with a ground or reference conductor is well known in electromagnetic compatibility and microwave circuit fields. In this paper we consider the characteristics of a long two-conductor line embedded in an inhomogeneous medium while taking account of the difference between two phase constants in independent propagation modes of two parallel lines. The characteristics of near-end and far-end crosstalk and of through-end transmission are discussed for frequencies up to more than the frequency where the line length is 10 times the wavelength. Interesting properties, such as very strong and null crosstalk phenomena that occur at the far end and non-transmission at the through end, appear in the envelope characteristics. The reason for these properties is clarified by making theoretical and experimental investigations.
Scientific journal, English - A vector network analyzer based on seven-port wave-correlator
T Yakabe; FC Xiao
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E88C, 7, 1483-1489, Jul. 2005, Peer-reviwed, A seven-port wave-correlator based vector network analyzer is proposed. The seven-port wave-correlator is a combination of two six-port wave-correlators which share common components. Furthermore, the complex wave ratio measurement accuracy is improved since the input signals can be directly detected by the side-arm ports. A seven-port wave-correlator is fabricated using microstrip branch line couplers. The performance of the wave-correlator and the constructed network analyzer are evaluated, and the measurement accuracy is confirmed.
Scientific journal, English - Network functions for coupling analysis of multi-conductor lines in a printed circuit board backed with a ground plane
Y. Kami; F. Xiao
Proc. Pan-Pacific EMC Joint Meeting, (PPEMC'05), Hyogo, Japan, p. 9, May 2005, Peer-reviwed
International conference proceedings, English - A new generation method of DSB-SC signal for radiated immunity/ susceptibility test using rotating-EM fields and its basic characteristics
Kimitoshi Murano; Majid Tayarani; Fengchao Xiao; Yoshio Kami
Conference Record - IEEE Instrumentation and Measurement Technology Conference, 1, 657-661, 2005, Peer-reviwed, A new generation technique of the double-side-band suppressed-carrier signals for radiated, radio frequency, immunity/susceptibility test using electromagnetic field of rotating polarization and its basic characteristics are studied. The signal can be easily generated with only one signal generator by using the technique. In this paper, the basic characteristics of the signals generated by using the technique proposed here are clarified, and the uniformity of the field generated in an anechoic chamber by using the signals is evaluated. In addition, a susceptibility test is conducted by using the new system to which the proposed technique is applied. From these results, the effectiveness of our proposed system is confirmed. © 2005 IEEE.
International conference proceedings, English - Direct calibration method of six-port type wave correlator with one phase shifter for various digital receivers
Y. Arai; F. Xiao; T. Yakabe
IEICE Trans. Electron., (in Japanese), The Institute of Electronics, Information and Communication Engineers, vol. J87-C, no. 12, pp. 1124-1130, Dec. 2004, Peer-reviwed, 近年,二つの高周波の振幅比と位相差を複数の電力値と校正により決定されるパラメータから高精度に測定するシステムとして6ポート型コリレータが提案され,電波到来方向推定,微小速度計測,ベクトルネットワークアナライザ(VNA)への応用が報告されている.本論文ではBPSK,QPSK,8PSK等の各種ディジタル受信機への応用を目的とした6ポート型コリレータの新しい校正方式として直接校正法を提案する.本方式は移相器のみを用いて搬送波周波数の1周期分の出力ポート電力の変化パターンをあらかじめ測定することにより,これまで時間を要するパラメータを用いた位相差の算出過程を排除し,コンパレータのみで実時間で直接位相差測定を実現できる.すなわち,本方式は高速通信が要求されるシステムに最適な校正法であると同時に,コリレータのハードウェアを各種ディジタル受信機にそのまま適用できる.まず,BPSK用受信機についての適用例を示し,システム実現の可能性を確認する.次に,マイクロストリップ線路を用いた5ポートコリレータをX帯で試作し,8PSK用受信機に応用したので報告する.
Scientific journal, Japanese - Chain-Matrix expression for a three-conductor transmission line with a ground plane
Y. Kami; F. Xiao
2004 Korea-Japan Joint Conference on AP/EMC/EMT, (KJJC-AP/EMC/EMT 2004), Seoul, Korea, pp. 65-68, Nov. 2004, Peer-reviwed
International conference proceedings, English - The development of a simple equivalent circuit of power-ground plane structure
F. Xiao; K. Murano; Y. Kami
Symposium on Electromagnetic Compatibility, (EMC EUROPE 2004), Eindhoven, The Netherlands, pp. 464-469, Sep. 2004, Peer-reviwed
International conference proceedings, English - Radiated immunity/susceptibility test method using electrically controlled polarization fields
Y. Kami; F. Xiao; K. Murano
2004 Asia-Pacific Radio Science Conference, (AP-RASC2004), Qingdao, China, p. 524, Aug. 2004, Peer-reviwed
International conference proceedings, English - An immunity/susceptibility test method using electromagnetic wave of rotating polarization
K Murano; FC Xiao; Y Kami
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 53, 4, 1184-1191, Aug. 2004, Peer-reviwed, An immunity/susceptibility test method using electromagnetic waves of rotating polarization is described and test results are discussed. Low-rate rotation of the field polarization is controlled electrically and continuously in a two-dimensional plane, so that radiated immunity/susceptibility characteristics that are three-dimensionally depicted can be obtained by using a turntable together with this method. This paper explains how the rotating fields are generated, and discusses experimentally measured characteristics of several test examples. The results show the effectiveness of the proposed method for quickly visualizing the weak/strong immunity/susceptibility directions, demonstrating its usefulness for application in the trial phase of a product development.
Scientific journal, English - Seven-port wave-correlator based vector network analyzer
F. Xiao; F. M. Ghannouchi; T. Yakabe
Conference on Precision Electromagnetic Measurements (CPEM 2004), London, UK, pp. 105-106, Jul. 2004, Peer-reviwed
International conference proceedings, English - Six-port wave-correlator and its applications
T. Yakabe; F. Xiao
5th Asia-Pacific Engineering Research Forum on Microwaves and Electromagnetic Theory, Kyushu University, Fukuoka, Japan, pp. 132-138, Jul. 2004
International conference proceedings, English - Electromagnetic emission from edge placed differential traces on printed circuit board
F. Xiao; K. Murano; M. Tayarani; Y. Kami
2004 Int. Symp. Electromagnetic Compatibility (EMC'04 Sendai), Sendai, Japan, pp. 29-32, Jun. 2004, Peer-reviwed
International conference proceedings, English - Four-septum TEM cell for immunity/susceptibility test by rotating EM fields
Y. Suganuma; F. Xiao; K. Murano; M. Tayarani; Y. Kami
2004 Int. Symp. Electromagnetic Compatibility (EMC'04 Sendai), Sendai, Japan, 1, pp. 121-124, Jun. 2004, Peer-reviwed
International conference proceedings, English - Radiated immunity/susceptibility test method using slowly rotating electromagnetic wave
Y. Kami; F. Xiao; K. Murano; M. Tayarani
2004 Int. Symp. Electromagnetic Compatibility (EMC'04 Sendai), Sendai, Japan, 1, pp. 181-184, Jun. 2004, Peer-reviwed
International conference proceedings, English - Long-line effects for multi-conductor lines embedded in an inhomogeneous medium
O. Makino; F. Xiao; Y. Kami
2004 Int. Symp. Electromagnetic Compatibility (EMC'04 Sendai), Sendai, Japan, pp. 281-284, Jun. 2004, Peer-reviwed
International conference proceedings, English - Radiation from elbow-shaped transmission line
T. Yamada; K. Murano; F. Xiao; Y. Kami; J. L. Drewniak
2004 Int. Symp. Electromagnetic Compatibility (EMC'04 Sendai), Sendai, Japan, pp. 205-208, Jun. 2004, Peer-reviwed
International conference proceedings, English - Susceptibility characterization of a cavity with an aperture by using slowly rotating EM fields: FDTD analysis and measurements
K Murano; T Sanpei; FC Xiao; C Wang; Y Kami; JL Drewniak
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 46, 2, 169-177, May 2004, Peer-reviwed, This paper describes the evaluation of the susceptibility of a cavity with an aperture using the finite-difference time-domain (FDTD) method and experimentally: To reduce the computing time; the FDTD method is used for the radiation from the cavity and the susceptibility is obtained by using the reciprocity theorem. The cavity used here is modeled after a full-tower desktop enclosure with a 3.5-in bay. The susceptibility characteristics are evaluated by measuring outputs of a monopole antenna and transmission lines installed in the cavity. The susceptibility characteristics, using a three-dimensional (3-D) map, are studied from the computed and the measured results by applying slowly rotating electromagnetic fields to the cavity on a turntable. Measured, and modeled results are in good agreement, indicating the merits of the proposed approach for susceptibility/immunity evaluation. Moreover, some discussions are made to check the susceptibility mechanism.
Scientific journal, English - 3D-susceptibility evaluation of actual housings of electronic equipment using rotating EM fields
K Murano; M Tayarani; FC Xiao; Y Kami
2004 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, SYMPOSIUM RECORD 1-3, IEEE, 89-92, 2004, Peer-reviwed, The evaluation method of electromagnetic-shielding capability and three-dimensional susceptibility map for an actual housing of electronic equipment are studied. Although the shielding capability of an enclosure is conventionally evaluated using shielding effectiveness (SE), it is feared that the immunity/susceptibility-weak points of the enclosure are overlooked. In this paper, the susceptibility of an actual personal computer housing as an equipment under test (EUT) is measured using rotating electromagnetic field. Experimental results show that the evaluation using susceptibility is more effective than the conventional SE. In addition, the test method is more effective to specify the immunity/susceptibility-weak points of EUT visually and easily. Furthermore, it is shown that the condition of the incident EM field and the arrangement position of an EM-field sensor seriously affect the susceptibility of the actual housing.
International conference proceedings, English - Application of a six-port wave-correlator for a very low velocity measurement using the Doppler effect
FC Xiao; FM Ghannouchi; T Yakabe
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 52, 2, 297-301, Apr. 2003, Peer-reviwed, A new radar system based on a six-port wave-correlator is proposed for measuring the Doppler frequency of a moving object. The six-port wave-correlator is operated as a two-channel wave receiver and the vector relation, both amplitude and phase, between the two input signals is determined directly by measuring the power levels. By using the six-port wave-correlator, no circulator or mixer is needed for the phase measurement. The proposed system has been applied for the measurement of an object moving at a very low velocity. The experiment and simulation results at 10 GRz show that the target velocity around 0.2 mm/s has been successfully inferred, which proved the validity of the proposed scheme.
Scientific journal, English - A new four-septum TEM cell with multi-polarizations for use in immunity testing
F. Xiao; K. Murano; Y. Kami
15th Int. Zurich Symp. Electromagnetic Compatibility, Zurich, Switzerland, pp. 219-222, Feb. 2003, Peer-reviwed
International conference proceedings, English - Common-mode inductance and radiation of edge placed. differential traces on printed circuited board
FC Xiao; K Murano; M Tayarani; Y Kami
ASIA-PACIFIC CONFERENCE ON ENVIRONMENTAL ELECTROMAGNETICS, CEEM'2003, PROCEEDINGS, PUBLISHING HOUSE BEIJING UNIV POSTS & TELECOMMUNICATIONS, 99-102, 2003, Peer-reviwed, With respect to the single-ended trace, differential signaling is much advantageous to the signal integrity and common-mode radiation level reduction. However, to guarantee the required signal transmission, the two traces in the differential pair should be perfectly balanced. Edged placement of a differential pair on the PCB causes balance disruption and creates common-mode (CM) currents resulting in an increased electromagnetic interference level. In this work, the CM inductance and radiation from differential traces with edge placement are quantified. The common-mode inductance of edged-placed differential pair on PCB is derived. Then the characteristics of the common-mode inductance of differential pair are studied for different geometries. Finally, the total radiation powers for several geometries due to the edge placement of the differential-pair are measured.
International conference proceedings, English - Radiated immunity/susceptibility characteristics of actual chassis by using an electromagnetic wave of rotating polarization
K Murano; M Tayarani; FC Xiao; Y Kami
ASIA-PACIFIC CONFERENCE ON ENVIRONMENTAL ELECTROMAGNETICS, CEEM'2003, PROCEEDINGS, PUBLISHING HOUSE BEIJING UNIV POSTS & TELECOMMUNICATIONS, 323-326, 2003, Peer-reviwed, To evaluate radiated immunity/susceptibility characteristics for the chassis of an electronics-product with complex configuration, authors have already proposed a new test method using an electromagnetic field whose polarization rotates slowly. By using this method, three-dimensional characteristics was depicted such that weak/strong directions against various field polarizations could be obtained easily. In this paper, as an application of this method, a tower-type personal computer chassis is considered and its three dimensional characteristics is obtained. It should be mentioned that it is very difficult to theoretically evaluate and/or estimate the above characteristics. Therefore, the proposed test method would be expected in a phase of developing products.
International conference proceedings, English - Numerical investigation of the field distribution inside a four septum TEM cell
F. Xiao; Y. Kami
International Symposium on Electromagnetic Compatibility (EMC EUROPE 2002), Sorrento, Italy, pp. 707-712, Sep. 2002, Peer-reviwed
International conference proceedings, English - Evaluation of 3D radiated immunity characteristics of cavities with apertures
K. Murano; T. Sanpei; F. Xiao; F. Centola; Y. Kami; J. L. Drewniak
International Symposium on Electromagnetic Compatibility (EMC EUROPE 2002), Sorrento, Italy, pp. 907-911, Sep. 2002, Peer-reviwed
International conference proceedings, English - Transient near fields coupling to a finite length transmission line
W. Liu; F. Xiao; Y. Kami
International Symposium on Electromagnetic Compatibility (EMC EUROPE 2002), Sorrento, Italy, pp. 1225-1229, Sep. 2002, Peer-reviwed
International conference proceedings, English - Extracting CAD models for quantifying noise coupling between vias in PCB layouts
S Luan; J Fan; W Liu; F Xiao; J Knighten; N Smith; R Alexander; J Nadolny; Y Kami; J Drewniak
52ND ELECTRONIC COMPONENTS & TECHNOLOGY CONFERENCE, 2002 PROCEEDINGS, IEEE, 343-346, 2002, Peer-reviwed, A method to extract a lumped element prototype SPICE model is used to study noise coupling between non-parallel traces on a PCB. The parameters in this model are extracted using a PEEC-like approach, a Circuit Extraction approach based on a Mixed-Potential Integral Equation formulation (CEMPIE). Without large numbers of unknowns, the SPICE model saves computation time. Also, it is easy to incorporate into system SPICE net list to acquire the system simulation result considering the coupling between traces on the printed circuit board (PCB). A representative case is studied, and the comparison of measurements, CEMPIE simulation, and SPICE modeling are given.
International conference proceedings, English - Application of six-port wave-correlator for very low velocity measurement using Doppler effect
F Xiao; FM Ghannouchi; T Yakabe
2002 CONFERENCE ON PRECISION ELECTROMAGNETIC MEASUREMENTS, CONFERENCE DIGEST, IEEE, 74-75, 2002, Peer-reviwed, A new technique is proposed for measuring the Doppler frequency of a moving object by using the six-port correlator. The examination of this new proposal has been done with an object moving at a very low speed. The experiment and simulation results show the target velocity around 0.2 mm/s has been successfully inferred, which proved the validity of the proposed scheme.
International conference proceedings, English - Modeling noise coupling from non-parallel PCB trace routing
SF Luan; FC Xiao; WK Liu; J Fan; Y Kami; JL Drewniak; RE DuBroff
2002 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, VOLS 1 AND 2, SYMPOSIUM RECORD, IEEE, 109-112, 2002, Peer-reviwed, Coupling between PCB signal traces in proximity is of concern to PCB designers and EMC engineers. The behavior of noise coupling between non-parallel microstrip lines is studied in this paper by a full-wave numerical modeling method CEMPIE, designating a circuit extraction approach based on a mixed-potential integral equation formulation. Good agreement between the numerical results and measurements was obtained.
International conference proceedings, English - The use of via holes for controlling the crosstalk of non-parallel microstrip lines on PCBs
F Xiao; K Murano; Y Kami
2002 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, VOLS 1 AND 2, SYMPOSIUM RECORD, IEEE, 633-638, 2002, Peer-reviwed, In this work, the metal filled via holes are constructed into fences between the non-parallel microstrip lines to control the crosstalk. In practice, coupling between non-parallel traces is common. On the other hand, via holes are easy and inexpensive to build using the current fabrication process for the commonly used PCBs. The effects of the via holes for alleviating the coupling are investigated experimentally and numerically. The crosstalk is controlled by adjusting the position of the via holes, the structure of via fence, and the length of the via fence. Some design guidelines for the proper placement of the via holes are concluded. Experiments are conducted and the calculated results are compared with the measured data.
International conference proceedings, English - Analysis of crosstalk between finite-length microstrip lines: FDTD approach and circuit-concept modeling
FC Xiao; WK Liu; Y Kami
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 43, 4, 573-578, Nov. 2001, Peer-reviwed, Two approaches, one based on the circuit concept and the other based on the field theory, are used to model the crosstalk between two microstrip lines of finite length and arbitrary orientation. In the circuit-concept modeling, a set of equations for the line voltages and currents has been derived from a modified telegrapher's equation. A four-port network expression is resultantly obtained by solving the equations, thus the crosstalk can be predicted by applying terminal conditions to the network expression. On the other hand, the extended finite-difference time-domain (FDTD) method has been used to model the terminal resistors and the feeding resistive voltage source in the crosstalk analysis. Several physical models have been fabricated and experiments were performed. The calculated results are compared to measurements. In our experiment, for microstrip lines of finite length and arbitrary orientation, there are short line-sections or vias at each of the four ports, which should be incorporated into the crosstalk analysis. This effect has been investigated numerically and experimentally.
Scientific journal, English - Design of a log-periodic dipole array for pulsed electromagnetic compatibility testing using a genetic algorithm
F. Xiao; Y. Kami
Progress In Electromagnetics Research Symp. (PIERS 2001), Osaka, Japan, p. 378, Jul. 2001, Peer-reviwed
International conference proceedings, English - Modified six-port junction with its concise calibration method suitable for wave ratio measurements
T. Yakebe; F. Xiao; T. Murae; F. M. Ghannouchi
8th International Symposium on Microwave and Optical Technology (ISMOT'01), Montreal, Canada, pp. 319-322, Jun. 2001, Peer-reviwed
International conference proceedings, English - Six-port based wave-correlator with application to beam direction finding
T Yakabe; FC Xiao; K Iwamoto; FM Ghannouchi; K Fujii; H Yabe
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 50, 2, 377-380, Apr. 2001, Peer-reviwed, Six-port technology is well known for its ability to accurately measure the scattering parameters of a microwave network. In this paper a six-port based wave-correlator, which is operated as a two-channel wave receiver, is reported, A novel method for calibrating the six-port based wave-correlator by using only one phase shifter is proposed. The calibration procedure offers simple formulas for determining the calibration parameters, and their validity and accuracy are confirmed by measurements. In addition, an application of the proposed wave-correlator to beam direction finding is discussed, Experimental proof at X-band frequency was carried out and satisfactory results were obtained.
Scientific journal, English - MMIC high-presion S-band five-bit attenuator with 1.5 degree phase variation
H. Takasu; F. Xiao; T. Yakabe; H. Yabe
IEICE Trans. Electron., (in Japanese), The Institute of Electronics, Information and Communication Engineers, vol.J84-C, no. 2, pp. 97-103, Feb. 2001, Peer-reviwed, 本論文では, 5ビットMMICディジタルアッテネータの設計と試作について述べている.ディジタルアッテネータを通信システムの部品として使用する際, 小さな位相変動幅をもつことが要求される.この要求に対して, 我々は1入力2出力(Single-pole double-throw;SPDT)スイッチで抵抗減衰回路と伝送線路とを切り換えるアッテネータ回路と, ゲート幅の異なる二つのFETのオン抵抗を相互に切り換える形のアッテネータ回路を組み合わせた回路形式を採用した.その結果, 位相変動幅が小さく, かつ高精度な減衰量特性をもつアッテネータを設計することが可能となった.設計したS帯5ビットディジタルアッテネータの試作結果は, 減衰量が7dBから27dB, 減衰量誤差が0.09dB(rms), 位相変動幅が1.38°(rms), 入出力VSWRが1.3と良好な結果を得た.また, シミュレーション値と試作結果の実測値を比較し, 両者がよい一致を示しめしていることを明らかにした.これにより, 本論文で示したMMICディジタルアッテネータの設計が妥当であることを確認した.
Scientific journal, Japanese - Transient response of nonuniform and uniform transmission lines excited by external field
FC Xiao; Y Kami
2001 IEEE EMC INTERNATIONAL SYMPOSIUM, VOLS 1 AND 2, IEEE, 210-215, 2001, Peer-reviwed, Transient responses of externally excited nonuniform and uniform transmission lines are investigated. The excited field is generated by a monopole antenna installed in the vicinity of the transmission line and driven by a step waveform. The numerical method employed is based on the finite-difference time-domain method, which can easily derive the transient response at the ends of the transmission line and the transient field distribution as well. Thus the coupling mechanism between the antenna and the transmission line is clarified based on the transient fields results. Experiments are conducted and the calculated results are compared with the measured data.
International conference proceedings, English - Solution of scattering from conducting cylinders using an iterative method
F Xiao; H Yabe
IEEE TRANSACTIONS ON MAGNETICS, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 36, 4, 884-887, Jul. 2000, Peer-reviwed, Open-region problems of scattering by conducting cylinders are solved employing finite element method (FEM). The radiation condition for the open-region problem is enforced by the field integral equation solution approach using Green's function through an iterative procedure. At each iteration cycle, the induced currents on the scatterer are evaluated and their scattered fields at the terminating surface are calculated by the held integral equation. Using this iterative procedure, the computational domain can be terminated very closely to the scatterer, yet keeping the sparseness of the FEM matrices. This iterative method is applied for several TE scattering problems of conducting cylinders. The numerical results are presented and compared dth the results of other methods to illustrate the applicability and accuracy of this method.
Scientific journal, English - Six-port based wave-correlator
T Yakabe; F Xiao; K Iwamoto; FM Ghannouchi; K Fujii; H Yabe
2000 CONFERENCE ON PRECISION ELECTROMAGNETIC MEASUREMENTS DIGEST, IEEE, 646-647, 2000, Peer-reviwed, A novel method for calibrating six-port based wave-correlators is reported in this paper. The calibration procedure uses only one phase shifter and offers simple formulas for determining the calibration parameters. Some experiments using a new six-port junction for the wave-correlator at X-band frequency was carried out and the results confirmed the validity and accuracy of the proposed method.
International conference proceedings, English - Solution of scattering from conducting cylinders using an interative method
F. Xiao; H. Yabe
12th Conference on the Computation of Electromagnetic Fields（COMPUMAG'99），Sapporo, Japan, pp. 604-605, Oct. 1999, Peer-reviwed
International conference proceedings, English - Born近似を用いた逆散乱問題
秦野芳宏; 肖鳳超; 矢加部利幸; 矢部初男
電気通信大学紀要, 電気通信大学, 12, 1, 19-23, Jun. 1999, Peer-reviwed
Research institution, Japanese - Permittivity reconstruction of lossless dielectric cylinders by micro genetic algorithm coupled with deterministic method
F. Xiao; H. Yabe
1998 Asia-Pacific Microvave Conference（APMC'98），Yokohama, Japan, pp. 637-640, Dec. 1998, Peer-reviwed
International conference proceedings, English - Microwave imaging of perfectly conducting cylinders from real data by micro genetic algorithm coupled with deterministic method
FC Xiao; H Yabe
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E81C, 12, 1784-1792, Dec. 1998, Peer-reviwed, Retrieving the unknown parameters of scattering objects from measured field data is the subject of microwave imaging. This is naturally and usually posed as an optimization problem. In this paper, micro genetic algorithm [1] coupled with deterministic method is applied to the shape reconstruction of perfectly conducting cylinders. The combined approach, with a very small population like the micro genetic algorithm performs much better than the conventional large population genetic algorithms (GA's) in reaching the optimal region. In addition, we propose a criterion for switching the micro GA to the deterministic optimizer. The micro GA is utilized to effectively locate the vicinity of the global optimum, while the deterministic optimizer is employed to efficiently reach the optimum after inside this region. Therefore, the combined approach converges to the optimum much faster than the micro GA. The proposed approach is first tested by a function optimization problem, then applied tb reconstruct perfectly conducting cylinders from both synthetic data and real data. Impressive and satisfactory results are obtained for both cases, which demonstrate the validity and effectiveness of the proposed approach.
Scientific journal, English - An efficient finite element-integral equation method for electromagnetic scattering from metallic cylinders with arbitrary cross sections
FC Xiao; H Yabe
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E81C, 10, 1648-1654, Oct. 1998, Peer-reviwed, An efficient finite element-integral equation method is presented for calculating scattered fields from conducting objects. By combining the integral equation solution with the finite element method, this formulation allows a finite element computational domain terminated very closely to the scatterer and thus results in the decrease of the resultant matrix size. Furthermore, we employ a new integral approach to establish the boundary condition on the finite element terminating surface. The expansion of the fields on the integration contour is not related to the fields on the terminating surface, hence we obtain an explicit expression of the boundary condition on the terminating surface. Using this explicit boundary condition with the finite element solution, our method substantially improves the computational efficiency and relaxes the computer memory requirements. Only one matrix inversion is needed through our formulation and the generation and storing of a full matrix is not necessary as compared with the conventional hybrid finite element methods. The validity and accuracy of the formulation are checked by some numerical solutions of scattering from two-dimensional metallic cylinders, which are compared with the results of other methods and/or measured data.
Scientific journal, English - Super exterior element solution of open region field problems by using Fourier transform
S. Gomi; R. Zhang; F. Xiao; H. Yabe
1998 China-Japan Joint Meeting on Microwaves (CJMW'98)，Beijing, China, pp. 151-154, Aug. 1998, Peer-reviwed
International conference proceedings, English - Rigorous design of iris-coupled waveguide filters by field-theory-based approach and genetic algorithms
FC Xiao; H Yabe
IEICE TRANSACTIONS ON ELECTRONICS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E81C, 6, 934-940, Jun. 1998, Peer-reviwed, The increasing activity at millimeter wave frequency band and the growing demand for waveguide components to be applied for integrated circuit purpose have promoted the need for applying the field-theory-based approaches to the design procedure. In this paper, genetic algorithms (GA's) are applied to accurately design the iris-coupled waveguide filters based on network-boundary element method (NBEM). GA's model the natural selection and evolve towards the global optimum, thus avoid being trapped in local minima. Network-boundary element method, which combines boundary element method with network analysis method, derives the network parameters of the guided wave structures with less storage location and central processing: unit time. Therefore, NBEM is a feasible and efficient field-theory-based approach for the GA optimization of waveguide filters. With NBEM performing the task of evaluating the performance of the filter designs optimized by the GA, rigorous and optimal designs of the waveguide filters are realized. The obtained analysis and optimization results are compared to a number of reference solutions to demonstrate the validity and accuracy of the proposed approach.
Scientific journal, English - Numerical dispersion relation for FDTD method in general curvilinear coordinates
F Xiao; H Yabe
IEEE MICROWAVE AND GUIDED WAVE LETTERS, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 7, 2, 48-50, Feb. 1997, Peer-reviwed, The numerical dispersion relation (NDR) of the finite-difference time-domain method in general curvilinear coordinates (FDTD-GCC) is discussed For a two-dimensional (2-D) uniformly skewed mesh, The analysis shows that the average scheme, which is being used in the FDTD-GCC method, causes an additional numerical dispersion error, When this dispersion error is considered, the FDTD-GCC method holds the same NDR as that of the FDTD discrete surface integral (FDTD-DSI) method, It also indicates that the stable range of the FDTD-GCC method, with respect to the skewing angle in the 2-D case, is narrowed due to the average scheme.
Scientific journal, English - A hybrid finite element solution of electromagnetic scattering in open region
FC Xiao; H Yabe
1997 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS, VOLS I-III, CITY UNIVERSITY HONG KONG, 485-488, 1997, Peer-reviwed, A novel formulation of finite element-integral equation method is proposed for electromagnetic scattering problem in open region. This approach allows for a surface terminated very closely to the scatterer, resulting in decreasing of the resultant matrix size. Moreover, by employing a new integral approach, the numerical efficiency is enhanced. Solutions for scattering of some two-dimensional conducting cylinders by this method are obtained and compared with the solutions of other methods and/or measured data.
International conference proceedings, English - A new global optimization method and its application for CAD
F. Xiao; H. Yabe
Bulletin of the University of Electro-Communications, The University of Electro-Communications, 9, 1, 17-20, Jun. 1996, Peer-reviwed
Research institution, English - Network-boundary element method and its application
F. Xiao; Z. Feng; H. Yabe
Bulletin of the University of Electro-Communications, 9, 1, 21-26, Jun. 1996, Peer-reviwed
Research institution, English - A global optimization method based on step by step reducing search area and its application for CAD
B. Gao; F. Xiao
Journal of Microwaves, (in Chinese), vol. 9, pp. 41-45, Jan. 1988, Peer-reviwed
Scientific journal, English
MISC
- Study on Topology Optimization of FSS Loaded Waveguide Slot Antenna
船木誠哉; 萓野良樹; 村上靖宜; 上芳夫; XIAO Fengchao; 伊藤桂一
2023, 電子情報通信学会技術研究報告(Web), 123, 215(EMCJ2023 35-71), 2432-6380, 202402250011179274 - A Study on Design of Bent Differential-Paired Lines by Preference Set-based Design Method (電磁環境 マグネティックス合同研究会 EMC一般(EMC Joint Workshop, 2017, Singapore))
KAYANO Yoshiki; KAMI Yoshio; ISHIKAWA Haruo; XIAO Fengchao; INOUE Hiroshi
電気学会, 18 May 2017, 電気学会研究会資料. EMC = The papers of technical meeting on electromagnetic compatibility, IEE Japan, 2017, 12, 51-56, English, 40021227859 - B-4-55 Susceptibility Difference of Transmission Lines between for BCI Test and for Applying Plane EM Field
Hoshino Misaki; Kami Yoshio; Xiao Fengchao; Majid Tayarani; Murano Kimitoshi
The Institute of Electronics, Information and Communication Engineers, 01 Mar. 2016, Proceedings of the IEICE General Conference, 2016, 1, 375-375, Japanese, 110010037350, AN10471452 - B-4-67 Common-Mode Current Caused by Partial Unbalance of Twisted Pair Cables
Yamamura Mitsutaku; Kami Yoshio; Murano Kimitoshi; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 01 Mar. 2016, Proceedings of the IEICE General Conference, 2016, 1, 387-387, Japanese, 110010037362, AN10471452 - B-4-40 A Simple Calculation Method of Transmission Characteristics for Twisted Pair Cables Placed Near the Ground
Yamamura Mitsutaku; Kami Yoshio; Murano Kimitoshi; Xiao Fengehao
The Institute of Electronics, Information and Communication Engineers, 25 Aug. 2015, Proceedings of the Society Conference of IEICE, 2015, 1, 253-253, Japanese, 110009983155, AN10489017 - BCS-1-4 Analytical Expression for Electromagnetic Radiation from Microstrip Traces
Xiao Fengchao; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 25 Aug. 2015, Proceedings of the Society Conference of IEICE, 2015, 1, "S-72"-"S-73", Japanese, 110009983380, AN10489017 - A Surrogate Model Based Algorithm for Near-Field Reconstruction (環境電磁工学) -- (若手研究者発表会)
HUANG Zixuan; KAMI Yoshio; XIAO Fengchao
電子情報通信学会, 09 Jul. 2015, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 115, 131, 37-41, English, 0913-5685, 40020557772, AN10013108 - Complex electromagnetic field estimation from 2D near magnetic field by using Plane Wave Spectrum method
KAWAGUCHI Manabu; KAMI Yoshio; MURANO Kimitoshi; XIAO Fengchao
In this report, we estimate electromagnetic field by using Plane Wave Spectrum method. In PWS method, any electromagnetic waves is decomposed into the sum of plane waves, which can theoretically be used to analyze the other electromagnetic field components from 2D near magnetic field. Therefore, it is possible to analyze the electromagnetic field with less components than other studies. We estimate electromagnetic field from 2D near magnetic field by using PWS method and the results are compared with theoretical values calculated. In the estimations, the calculated or the measured 2D near magnetic field are used. In addition, we estimate the complex poynting vector by using the estimated electromagnetic fields., The Institute of Electronics, Information and Communication Engineers, 06 Mar. 2015, IEICE technical report. Electromagnetic compatibility, 114, 503, 17-22, Japanese, 0913-5685, 110010017699, AN10013108 - B-4-65 Analysis of Transmission Lines on Meshed Ground Plane
Otsuka Masato; Kami Yoshio; Murano Kimitoshi; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 24 Feb. 2015, Proceedings of the IEICE General Conference, 2015, 1, 355-355, Japanese, 110009927451, AN10471452 - B-4-53 Examination of Analytical Model of Transmission Line with BCI Probe
Takata Naoki; Kami Yoshio; Xiao Fegchano; Tayarani Majid; Murano Kimitoshi
The Institute of Electronics, Information and Communication Engineers, 24 Feb. 2015, Proceedings of the IEICE General Conference, 2015, 1, 343-343, Japanese, 110009927439, AN10471452 - B-4-62 Study on LC Parameters of Dielectric Coated Lines near the Ground Plane
Yamamura Mitsutaku; Kami Yoshio; Murano Kimitoshi; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 24 Feb. 2015, Proceedings of the IEICE General Conference, 2015, 1, 352-352, Japanese, 110009927448, AN10471452 - B-4-61 Equivalent circuit Model for Through Silicon Vias with RDL
Hashimoto Kenji; Kawakami Masashi; Kami Yoshio; Murano Kimitoshi; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 24 Feb. 2015, Proceedings of the IEICE General Conference, 2015, 1, 351-351, Japanese, 110009927447, AN10471452 - Co-Analysis for SI/PI Problems of Differential Line in Multi-layer PCB
KAWAMITSU Yuki; KAMI Yoshio; MURANO Kimitoshi; XIAO Fengchao
Recently, the PCB with multi-layer substrate (Multi-layer PCB) is extensively used with the trend of small size and high density of the electronic equipment. However, SI/PI problems such as resonances between the power and ground layers in the Multi-layer PCB may occur. In this study, a three-layer board consists of signal-power-ground layers with coupled two lines is considered. An equivalent circuit model is proposed for the coupled lines while considering the effect of the resonance between the power-ground layers. The validity of the equivalent circuit model is checked by comparing the transmission characteristics of differential signaling and single-ended signaling with the full-wave simulations. The transmission characteristics of differential signaling are also examined by changing the coupling degree. It is shown that the equivalent circuit model is valid, and if two lines are tightly coupled, the effect of the resonance to the transmission characteristics is small., The Institute of Electronics, Information and Communication Engineers, 22 Jan. 2015, IEICE technical report. Electromagnetic compatibility, 114, 398, 13-18, Japanese, 0913-5685, 110010001958, AN10013108 - Susceptibility Characteristics of Transmission Line in BCI test
TAKATA Naoki; KAMI Yoshio; XIAO Fengchao; TAYARANI Majid; MURANO Kimitoshi
Recently, the Bulk current injection (BCI) test is conducted to evaluate the immunity of an electronic equipment under an external electromagnetic interference. Conducting the BCI test, an electric current is injected into a transmission line by using a BCI probe. However, the induced current in the transmission line might vary drastically, according to the placement position of the BCI probe. As a result, the immunity of the electronic equipment might be overestimated or underestimated. In this paper, an analytical model of the transmission line which an electric current was injected into by the BCI probe is proposed. In this model, the injected current is expressed by using an equivalent voltage source. The immunity/susceptibility of the transmission line that BCI probe was loaded is measured to check the validity of the analytical model. Moreover, the difference in the immunity/susceptibility characteristics of the transmission line due to the placement position of the BCI probe is examined., The Institute of Electronics, Information and Communication Engineers, 22 Jan. 2015, IEICE technical report. Electromagnetic compatibility, 114, 398, 1-4, Japanese, 0913-5685, 110010001955, AN10013108 - Analysis of Transmission Characteristics for Twisted Pair Cables using the RLGC Parameters of the Cable
YAMAMURA Mitsutaku; KAMI Yoshio; MURANO Kimitoshi; XIAO Fengchao
Recently, as automotive electronics has been increasing, models for predicting the transmission characteristics of wiring harnesses, which is suitable for the automotive EMC test, has been more needed. In this paper, the repetitive structure of cross-sectional shape of the twisted pair cable is focused. By taking account of RLGC parameters, the theoretical analysis model for the whole cables, based on multi-conductor transmission line theory, is proposed. Furthermore, scattering matrix parameters for test cables are compared among values of the theoretical, the measured and the simulated from a full-wave simulator. It was confirmed that the proposed model is applicable in a few hundred of MHz., The Institute of Electronics, Information and Communication Engineers, 19 Dec. 2014, IEICE technical report. Electromagnetic compatibility, 114, 381, 63-68, Japanese, 0913-5685, 110009977393, AN10013108 - The Equivalent Circuit Model for Transmission Lines on the Separated Ground Plane by Slit
Kawamitsu YUki; Kami Yoshio; Murano Kimitoshi; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 03 Sep. 2013, Proceedings of the Society Conference of IEICE, 2013, 1, 353-353, Japanese, 110009729507, AN10489017 - B-4-34 Effect of Guard Traces on the Transmission Characteristics of Differential Lines
Kumagai Hirokazu; Kami Yoshio; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 05 Mar. 2013, Proceedings of the IEICE General Conference, 2013, 1, 379-379, Japanese, 110009733379, AN10471452 - B-4-55 Equivalent Circuit Model for Transmission Lines on Slotted Ground Plane
Kawamitsu Yuki; Kami Yoshio; Murano Kimitoshi; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 05 Mar. 2013, Proceedings of the IEICE General Conference, 2013, 1, 400-400, Japanese, 110009733400, AN10471452 - Design and Fabrication of Ultra-Wide Bandpass Filter with Slotline
XIE Ji; MURANO Kimitoshi; KAMI Yoshio; XIAO Fengchao
The UWB filter is necessary and also an important device for ultra-wide band communication, .Targeting at 3 1 to 10.6 GHz pass band, which is the desired microwave band of UWB communication in the United States, the design and fabrication of UWB filters are discussed in this paper, The UWB filters are constructed by combining a band-pass filter with a low-pass filter. The low-pass filter is constructed by microstrip lines and perpendicular slotlines in the ground plane. In this paper, we show the equivalent circuit and design method of the low-pass filter with particular consideration to the frequency band to be attenuated. Furthermore we investigate the influence of the form of MSL and SL on the passband, and apply the results to the filter design A UWB filter by using the CSRR (complementary split ring resonator) with a high-pass characteristic and a low-pass filter is proposed as a new model. The rectangular shape of the CSRR is investigated and fabricated. Finally the measured and simulated results of the designed UWB filters are demonstrated., The Institute of Electronics, Information and Communication Engineers, 10 Jan. 2013, IEICE technical report. Electromagnetic compatibility, 112, 372, 25-30, Japanese, 0913-5685, 110009727462, AN10013108 - B-4-44 TRANSMISSION CHARACTERISTICS OF DIFFERENTIAL LINE WITH GROUND SLOT
Konishi Yusuke; Murano Kimitoshi; Kami Yoshio; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 28 Aug. 2012, Proceedings of the Society Conference of IEICE, 2012, 1, 340-340, Japanese, 110009589641, AN10489017 - B-4-33 A Measurement Method of Complex Near Electromagnetic Field by Using 6-Port Technique
Kobayashi Takashi; Murano Kimitoshi; Kami Yoshio; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 28 Aug. 2012, Proceedings of the Society Conference of IEICE, 2012, 1, 329-329, Japanese, 110009589630, AN10489017 - Measurement of Complex Near EM-fields by Using 6-port Fabricated with Broadband Hybrids
NAMBU Takayuki; KAMI Yoshio; XIAO Fengchao; MURANO Kimitoshi
A method for measuring complex electromagnetic (EM) fields near a circuit board is described. Six-port circuit technology is developed as an alternative way of vector network analyzer (VNA) for estimating the scattering matrix of a device under test (DUT) from measuring powers at four output ports. In this report, the technology is applied to the measurement of EM fields near circuit boards. Two magnetic probes are connected to input ports, where equivalent voltage sources are expressed in phasor due to magnetic fields picked up by the probes. Powers at four output-port loads can be formulated in four unknown terms of magnitudes and phases of the sources, though such equation would fall into an ill-condition problem when solving the unknown terms. To avoid the ill condition, the six-port network with applying some design conditions is proposed. The magnitude ratio and the phase difference between two magnetic fields near a ground slit under a microstrip line are estimated and compared with those directly obtained by a VNA. The results are in a good agreement., The Institute of Electronics, Information and Communication Engineers, 12 Jul. 2012, IEICE technical report. Electromagnetic compatibility, 112, 130, 23-28, Japanese, 0913-5685, 110009626002, AN10013108 - Bandwidth-Enhancement of the Measurement of Complex Near EM-field on PCBs by using 6-port Technique
TAKATSU Toshihiro; MURANO Kimitoshi; KAMI Yoshio; XIAO Fengchao
A bandwidth enhanced method for the measurement of complex electromagnetic (EM) field by using a 6-port network is proposed. The 6-port technique has been developed as an alternative constitution method for the vector network analyzer. It is a technique to estimate the S-parameters of a DUT by measuring powers at output ports of the 6-port network. Authors have applied the 6-port technique to the near field measurement. In particular, we have proposed a new 6-port network, where two voltage sources picked up by two EM probes are estimated in magnitude ratio and phase difference from powers measured at the output ports. In this report, an appropriate network constitution for the near field measurement method is described first. By applying the superheterodyne method to the 6-port network, the bandwidth of the measurement method has been enhanced., The Institute of Electronics, Information and Communication Engineers, 25 Nov. 2011, IEICE technical report. Electromagnetic compatibility, 111, 319, 13-18, Japanese, 0913-5685, 110009465628, AN10013108 - B-4-27 Transmission Characteristics of MSL Crossing Two Ground Slit
Torigoe Seiji; Xiao Fengchao; Murano Kimitoshi; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 30 Aug. 2011, Proceedings of the Society Conference of IEICE, 2011, 1, 340-340, Japanese, 110008727984, AN10489017 - B-4-25 EQUIVALENT CIRCUIT OF MICROSTRIP LINE PARALLEL TO A GROUND SLIT
Konishi Yusuke; Murano Kimitoshi; Kami Yoshio; Xiao Fengchao
The Institute of Electronics, Information and Communication Engineers, 30 Aug. 2011, Proceedings of the Society Conference of IEICE, 2011, 1, 338-338, Japanese, 110008727982, AN10489017 - Transmission Characteristics of Microstrip Line Parallel to a Ground Slit
KONISHI Yusuke; MURANO Kimitoshi; KAMI Yoshio; XIAO Fengchao
In this paper, we describe the transmission characteristics of the microstrip line parallel to a ground slit, and discuss the SI (signal integrity) problem due the slit. The propagation mode of the microstrip line used as a signal line is a TEM (transverse electromagnetic) mode. When the slit is evaluate as a slot line, the propagation mode is a quasi-TE (transverse electric) mode. In this case, we should confirm the crosstalk between the microstrip line and the parallel ground slit, though the mechanism of the crosstalk is not clearly understood or expressed in an analytical form. However, we observed the fact that the transmission characterisitcs of the microstrip line is affected by the ground slit. The study was made by discussing the results from experiments and an electromagnetic simulator., The Institute of Electronics, Information and Communication Engineers, 07 Jul. 2011, IEICE technical report, 111, 131, 13-18, Japanese, 0913-5685, 110008800380, AN10013108 - B-4-57 TRANSMISSION CHARACTERISTICS OF MICROSTRIP LINE PARALLEL TO A GROUND SLIT
Konishi Yusuke; Xiao Fengchao; Murano Kimitoshi; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1, 370-370, Japanese, 110008575309, AN10471452 - B-4-56 TRANSMISSION CHARACTERISTICS OF TWO SETS OF COUPLED LINE CROSSING SPLIT GROUND PLANE
Torigoe Seiji; Xiao Fengchao; Murano Kimitoshi; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1, 369-369, Japanese, 110008575308, AN10471452 - Crosstalk in Two Sets of Parallel Coupled Line Intersecting a Ground Slit When Differential-Mode Excitation
TORIGOE Seiji; XIAO Fengchao; MURANO Kimitoshi; KAMI Yoshio
When two sets of parallel coupled line in a sufficient distance and perpendicularly intersecting a ground slit, crosstalk between two sets is discussed. An eight-port network expression for the model has been proposed. When one set of coupled line is excited by a perfect differential mode voltage source, crosstalk occurs through the ground slit. Crosstalk components in terms of differential-mode and common-mode voltages and currents at ports are investigated by applying terminal conditions to the proposed network and using a numerical solver. Results of them are in a similar characteristic, so that it could be confirmed that the proposed expression can be useful to estimate such phenomena., The Institute of Electronics, Information and Communication Engineers, 21 Jan. 2011, IEICE technical report, 110, 402, 97-102, Japanese, 0913-5685, 110008676182, AN10013108 - B-4-32 A PROPOSAL OF COMPLEX EM-FIELD MEASUREMENT METHOD BY USING 6-PORT NETWORK
Takatsu Toshihiro; Xiao Fengchao; Murano Kimitoshi; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 02 Mar. 2010, Proceedings of the IEICE General Conference, 2010, 1, 382-382, Japanese, 110007883430, AN10471452 - Basic Characteristics and Generation Method of Rotating FM-EM Fields for RF Radiated Immunity/Susceptibility Test
MURANO Kimitoshi; TAYARANI Majid; XIAO Fengchao; KAMI Yoshio
A radio-frequency (RF) radiated immunity/susceptibility test method using a frequency-modulated rotating-electromagnetic field (rotating FM-EM field) is proposed. By applying the FM-EM field to equipment under test (EUT) in the RF radiated immunity/susceptibility test, the field with time-varying frequency spectra, such as a radiated emissions generated by a spread-spectrum clocking (SSC), can be experimentally simulated. Using the rotating FM-EM field, the detailed immunity/susceptibility characteristics of EUT under the above EM envi-ronment can be easily measured. In this paper, the generation method and the basic characteristic of the rotating FM-EM field are clarified. Moreover, susceptibility of a FM receiver measured by applying the rotating FM-EM field is shown as an example., The Institute of Electronics, Information and Communication Engineers, 14 Jan. 2010, IEICE technical report, 109, 370, 1-6, Japanese, 0913-5685, 110008000597, AN10013108 - B-4-38 SUSCEPTIBILITY MEASUREMENTS USING RF-PULSED ROTATING-EM FIELDS
Murano Kimitoshi; Tayarani Majid; Xiao Fengchao; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 04 Mar. 2009, Proceedings of the IEICE General Conference, 2009, 1, 381-381, Japanese, 110007097540, AN10471452 - B-4-44 ON SIX-PORT NETWORK FOR COMPLEX EM-FIELD MEASUREMENT
Kawakami Masashi; Xiao Fengchao; Murano Kimitoshi; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 04 Mar. 2009, Proceedings of the IEICE General Conference, 2009, 1, 387-387, Japanese, 110007097534, AN10471452 - Transmission-Line-Circuit Theory for EMC Problems in Main-Line Network
KAMI Yoshio; XIAO Fengchao; MURANO Kimitoshi
Power-line communication (PLC) using an inhouse main-power line needs not to construct a additional new transmission lines. The main lines are for power transmission of a frequency of 50- or 60-Hz, not for high-frequency signal of a short-wave band. The main distribution line is fundamentally constructed from two-conductor line, so that its electromagnetic fields are generated in an open area, which is anxious for EMC problems in PLC. Generally, a theory for a transmission line is based on telegrapher's equations. In this article, in considering the EMC problems in the main distribution, the usage. and application of a network, which has mode-voltage and -current terminals in the expression of impedance/admittance matrix has been proposed, is discussed. Moreover, some techniques based on the traditional transmission-line theory are discussed for some basic problems., The Institute of Electronics, Information and Communication Engineers, 16 Jan. 2009, IEICE technical report, 108, 401, 29-34, Japanese, 0913-5685, 110007131767, AN10013108 - Basic characteristics of rotating-EM field with RF pulse for radiated immunity/susceptibility test
MURANO Kimitoshi; TAYARANI Majid; XIAO Fengchao; KAMI Yoshio
A new radio-frequency (RF) radiated immunity/susceptibility test method using rotating-electromagnetic (EM) field with RF pulse is proposed. It has been clarified that the detailed immunity/susceptibility characteristics of electronic equipment can be easily obtained by applying the rotating-EM field to the immunity/susceptibility test. By newly applying RF pulse to the conventional method, it is expected that not only the detailed immunity/susceptibility characteristics but also some immunity-weak points of electronic equipment can be clarified. In this paper, the basic characteristics of the rotating-EM field with RF pulse are clarified theoretically and experimentally. Moreover, a measured result of susceptibility characteristics of a cavity with a slit obtained by using the proposed method is shown as an example., The Institute of Electronics, Information and Communication Engineers, 11 Apr. 2008, IEICE technical report, 107, 456, 37-42, Japanese, 0913-5685, 110006595838, AN10013108 - B-4-14 A NETWORK EXPRESSION FOR ESTIMATING LCL OF POWER-LINE CIRCUIT WITH BRANCH LINE
Oguri Yasunori; Murano Kimitoshi; Xiao Fengchao; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 29 Aug. 2007, Proceedings of the Society Conference of IEICE, 2007, 1, 277-277, Japanese, 110006636402, AN10489017 - B-4-4 TRANSMISSION CHARACTERISTICS OF TWO PARALLEL MICROSTRIP LINES WITH SLOTTED GROUND PLANE
Nagakubo Hitoshi; Murano Kimitoshi; Xiao Fengchao; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 29 Aug. 2007, Proceedings of the Society Conference of IEICE, 2007, 1, 267-267, Japanese, 110006636392, AN10489017 - Crosstalk Analysis Model for Traces Crossing Split Ground Plane and Its Reduction by Stitching Capacitor
XIAO Fengchao; NAKADA Yohei; MURANO Kimitoshi; KAMI Yoshio
回路基板において,グランド層に入ったスリットを十分な間隔をおいてまたぐ平行な2本のトレース線路が配置されているとき,この線路間には大きなレベルのクロストーク現象が発生する.この現象が磁界結合(誘導性結合)であることを実験的に明らかにし,これを根拠に等価回路モデルを提案し,実験結果と比較することによって検証している.更に,このモデルを用いてスリット間に挿入するステッチングキャパシタのクロストーク低減効果を評価している., The Institute of Electronics, Information and Communication Engineers, 01 Nov. 2006, The IEICE transactions on electronics C, 89, 11, 885-893, Japanese, 1345-2827, 110007379822, AA11412446 - B-4-63 Transmission Characteristics of Two Parallel Asymmetric Microstrip Lines
Nagakubo Hitoshi; Murano Kimitoshi; Xiao Fengchao; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2006, Proceedings of the Society Conference of IEICE, 2006, 1, 339-339, Japanese, 110006215688, AN10489017 - Transmission characteristic of two parallel asymmetric microstrip lines
NAGAKUBO Hitoshi; MURANO Kimitoshi; XIAO Fengchao; KAMI Yoshio
Crosstalk analysis techniques of two parallel microstrip lines of different width on PCB are studied. Two approaches are discussed to obtain a set of solutions of telegrapher's equations. To obtain the set, a modal analysis technique is applied to the equations for multi-conductor lines. In the technique, it is necessary to determine conversion matrices for independent modes. Here, two approaches are discussed; one is a way from predicted mode-excitation circuits of balanced- and unbalanced-mode circuits, and another from eigenvectors. Comparing the results computed by the both approaches and the measured results leads that the approach using eigenvectors is available not only for symmetrical lines but also for asymmetrical ones, but the approach from the predicted circuits is only for symmetrical line type. To know the asymmetry, current distributions in asymmetric lines of unbalanced-mode excitation are discussed from the post-processed experimental results and the computed results of the eigenvector approach., The Institute of Electronics, Information and Communication Engineers, 20 Jul. 2006, IEICE technical report, 106, 182, 95-100, Japanese, 0913-5685, 110004833258, AN10013108 - B-4-40 CROSSTALK BETWEEN TRANSMISSION LINES IN MULTILAYER SUBSTRATE
HASHIMOTO Ryota; MURANO Kimitoshi; XIAO Fengchao; KAMI Yoshio
The Institute of Electronics, Information and Communication Engineers, 07 Sep. 2005, Proceedings of the Society Conference of IEICE, 2005, 1, 364-364, Japanese, 110004738884, AN10489017 - B-4-44 Error of Rectangular Loop Probe for Near-Magnetic Field Measurement
IMAMURA Yusuke; XIAO Fengchao; MURANO Kimitoshi; KAMI Yoshio
The Institute of Electronics, Information and Communication Engineers, 07 Mar. 2005, Proceedings of the IEICE General Conference, 2005, 1, 405-405, Japanese, 110004736381, AN10471452 - B-4-41 EMC CHARACTERISTICS OF ELBOW-SHAPED TRANSMISSION LINE OVER GROUND WITH SLIT
Yamada Takuji; Murano Kimitoshi; Xiao Fengchao; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 07 Mar. 2005, Proceedings of the IEICE General Conference, 2005, 1, 402-402, Japanese, 110004736378, AN10471452 - Radiation from a Three-Dimensionally Bent Transmission Line
YAMADA Takuji; XIAO Fengchao; MURANO Kimitoshi; KAMI Yoshio
Signal integrity and radiation characteristics of a three-dimensionally bent transmission line such in mother bord-extension board structures are investigated with experimental results and numerical results using FEM. A bent line model with a slit at the bending part of ground is also considered as a near-model-to- actual-one model. As a result, the effect of ground structure on radiation characteristics of the transmission line system is cleared., The Institute of Electronics, Information and Communication Engineers, 28 Oct. 2004, IEICE technical report. Microwaves, 104, 384, 47-52, Japanese, 0913-5685, 110003206587, AN10013185 - B-4-116 BASIC EMC CHARACTERISTICS AT INTERCONNECTION OF MICROSTRIP LINE AND COAXIAL CABLE
TOYAMA Shun-ichiro; MURANO Kimitoshi; XIAO Fengchao; KAMI Yoshio
The Institute of Electronics, Information and Communication Engineers, 08 Mar. 2004, Proceedings of the IEICE General Conference, 2004, 1, 483-483, Japanese, 110003264552, AN10471452 - BASIC CHARACTERISTICS OF ROTATING EM FIELD GENERATED IN FOUR-SEPTUM TEM CELL
Suganuma Yoshimitsu; Murano Kimitoshi; Xiao Feng chao; Kami Yoshio
The Institute of Electronics, Information and Communication Engineers, 10 Sep. 2003, Proceedings of the Society Conference of IEICE, 2003, 1, 352-352, Japanese, 110003321979, AN10489017
Books and other publications
- EMC電磁環境学ハンドブック
上芳夫; 越後宏; 肖鳳超; 村野公俊
Japanese, Joint work, “電磁環境学における分布定数線路論,”, 三松株式会社出版事業部, Sep. 2009 - "Transient response for coupling of electromagnetic fields to transmission lines and crossing transmission lines" in Review of Radio Science 1999-2002
Y. Kami; W. Liu; F. Xiao
English, Joint work, IEEE Press, John Wiely & Sons, 2002
Lectures, oral presentations, etc.
- Multi-Objective Design of EMI Filter by Preference Set-based Design Method and Polynomial Chaos Method
Duc Chinh Bui; Yoshiki Kayano; Fengchao Xiao; Yoshio Kami
Oral presentation, English, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2022 - 多項式カオス展開を用いた多線条不均一伝送線路の統計的解析
八賀優人; 萓野良樹; 上 芳夫; 肖 鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2022 - 選好度付きセットベース設計手法を用いたロバスト設計 ～ (その3) 安定化電源回路の多目的満足化設計への適用
萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Sep. 2022 - Stochastic Galerkin法を用いた伝送線路の伝送特性の統計的解析
萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Jul. 2022 - NGnetを用いたトポロジー最適化によるFSS電波吸収体の設計に関する検討
佐藤裕汰; 萓野良樹; 上芳夫; 肖鳳超; 伊藤桂一
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EST, Domestic conference
May 2022 - Shielded-FPCの一次定数の周波数分散に関する検討
山極大葵; 萓野良樹; 上芳夫; 肖鳳超; 井上浩
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2022 - 分布並列線路の多段化による負の群遅延特性の発現帯域の広域化
山口徹; 萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2022 - FSSを用いた電波吸収体のトポロジー最適化に関する一検討
佐藤裕汰; 萓野良樹; 上芳夫; 肖鳳超; 伊藤桂一
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2022 - 電子軌道形状コイルを中継コイルとした磁界共振結合型無線電力伝送
加藤弘之; 肖鳳超; 萓野良樹; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2022 - ニューラルネットワークを用いた差動伝送線路の設計に関する基礎検討
北原廉; 萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EST, Domestic conference
Oct. 2021 - 低コストパッチアレーアンテナのミリ波帯への応用
本宮寛太; 萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2021 - 選好度付きセットベース設計手法を用いたロバスト設計 ～ 回路設計への適用（その2） ～
萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Aug. 2021 - 選好度付きセットベースデザイン手法を用いた安定化電源回路の最適設計と設計解のロバスト性の評価
小池健介; 萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2021 - 減衰極をもつ差動信号用EMIフィルタとPSDによる設計
萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2020 - グラウンド上の撚り線における誘導電流予測のための等価回路
稲垣直樹; 萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2020 - 選好度付きセットベース設計手法を用いたロバスト設計 –回路設計への適用–
萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Jul. 2020 - AM放送周波数帯におけるハイブリットEMIフィルターの設計
夏徳君; 萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2020 - 寄生成分を活用した極のある電源用 EMIフィルタの提案
板垣裕太; 肖鳳超; 上芳夫; 萓野良樹
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2020 - 伝送線路の一次・二次定数の実験的算出法
山極大葵; 萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2020 - 電圧源や電流源が存在している多ポートの回路網の等価電源表現
萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2020 - 選好度付きセットベースデザイン手法を用いたフィルタ回路の設計 –ロバスト性の評価–
萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Feb. 2020 - メタモデリングにRBF補間を用いたPSDによるデカップリングキャパシタ実装の一検討
川上雅士; 萓野良樹; 肖鳳超; 戸花照雄; 上芳夫; 秋元浩平; 礒田陽次
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Oct. 2019 - 多項式カオス展開を用いた差動伝送線路の伝送特性の解析
川村協; 萓野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EST, Domestic conference
Oct. 2019 - シーケンシャルサンプリングに基づく近傍電磁界推定
花岡信幸; 上芳夫; 肖鳳超; 萓野良樹
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2019 - 電源・グラウンド層に挟まれた伝送線路系の解析
増田絃之亮; 上芳夫; 肖鳳超; 萓野良樹
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2019 - 数理的方法による電源用EMIフィルタの最適化設計
板垣裕太; 萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2019 - メタモデリングにRBF補間を用いたPSD手法による電圧変動抑制のためのデカップリングキャパシタ実装の一検討
川上雅士; 萓野良樹; 肖鳳超; 上芳夫; 戸花照雄; 秋元浩平; 磯田陽次
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2019 - 周期構造を有する伝送線路の二次定数の近似表現
松石紘輝; 萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2019 - 非対称差動伝送線路の電圧電流分布の評価法
萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2019 - 選好度付きセットベース設計手法を用いた負の群遅延線路の設計法に関する一検討 ～ 粒子群最適化手法との比較 ～
萓野 良樹; 上 芳夫; 石川 晴雄; 肖 鳳超; 井上 浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Jun. 2019 - ESD電流をハーネスに印加した時の特性解析
侯俊; 上芳夫; 肖鳳超; 萓野良樹
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2019 - ウェアラブル機器の静電気放電の等価回路
張戈弋; 上芳夫; 肖鳳超; 萓野良樹
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2019 - PSD手法を用いた差動伝送線路用EMIフィルタの多目的設計
萓野良樹; 川上雅士; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EST, Domestic conference
Oct. 2018 - 差動信号用EMIフィルタのPSD手法による多目的設計に関する一検討
萓野良樹; 川上雅士; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2018 - 周期構造を有する伝送線路の伝送特性に関する一検討
松石紘輝; 萓野良樹; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2018 - 不完全な電源/グラウンド層に挟まれた伝送線路の特性
佐々木修憲; 上芳夫; 肖鳳超; 萓野良樹
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2018 - 自動車室内へ入射する電磁波の解析
福井伸治; 前田登; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Domestic conference
Sep. 2018 - 選好度付きセットベースデザイン手法を用いたEMIフィルタの多目的設計に関する一検討
萓野 良樹; 上 芳夫; 石川 晴雄; 肖 鳳超; 井上 浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jul. 2018 - 選好度付きセットベースデザイン手法を用いた伝送線路型フィルタの設計法に関する一検討 ～ (その3)フィルタ理論による設計との比較 ～
萓野 良樹; 上 芳夫; 石川 晴雄; 肖 鳳超; 井上 浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Jun. 2018 - 選好度付きセットベースデザイン手法を用いた伝送線路型フィルタの設計法に関する一検討～(その2) メタモデリングに実験計画法を用いた場合～
萓野 良樹; 上 芳夫; 石川 晴雄; 肖 鳳超; 井上 浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Mar. 2018 - 等長配線用ミアンダ遅延線をもつ差動伝送線路のPSD手法による多目的設計に関する一検討
萓野 良樹; 上 芳夫; 石川 晴雄; 肖 鳳超; 井上 浩
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2018 - 選好度付セットベース設計手法を用いた電源-GNDプレーンへのデカップリングキャパシタの素子値決定手法の検討
川上 雅士; 萓野 良樹; 石川 晴雄; 上 芳夫; 肖 鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2018 - 選好度付きセットベース設計手法について
上 芳夫; 萓野 良樹; 石川 晴雄; 肖 鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Nov. 2017 - 選好度付きセットベースデザイン手法を用いた伝送線路型フィルタの設計法に関する一検討
萓野 良樹; 上 芳夫; 石川 晴雄; 肖 鳳超; 井上 浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Nov. 2017 - 負の群遅延特性のためのSIR型スタブを持つ伝送線路のPSD手法による設計
萓野良樹; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2017 - 車載Ethernet用イミュニティ性能推定および車室内の電波伝搬解析
福井伸治; 森寛之; 溝口幸; 前田登; 深川康弘; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会, Domestic conference
Sep. 2017 - 選好度付きセットベースデザイン手法による負の群遅延特性を持つSIR型伝送線路構造の設計に関する一検討
萓野良樹; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMD, Domestic conference
Jul. 2017 - A Study on Design of Bent Differential-Paired Lines by Preference Set-based Design Method
Y. Kayano; Y. Kami; H. Ishikawa; F. Xiao; H. Inoue
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
May 2017 - Investigation on Characteristic Impedance of Differential Transmission Line in Meshed-ground Flexible Printed Circuit
Y. Zhu; F. Xiao; Sun; Y. Kayano; Y. Kami
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Mar. 2017 - 選好度付きセットベースデザイン手法の屈曲差動伝送線路設計への適用
萓野良樹; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Mar. 2017 - 選好度付きセットベースデザイン手法の負の群遅延回路設計への適用
萓野良樹; 上芳夫; 石川晴雄; 肖鳳超; 井上浩
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2017 - BCIプローブが装荷された伝送線路の3ポートモデル化
星野美咲; 上芳夫; 肖鳳超; Majid Tayarani; 村野公俊
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2017 - 被試験機器を設置した場合のTEMセルの特性について
芳野正明; 萱野良樹; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2017 - Design of Transmission Line in Meshed-ground Flexible Printed Circuit
Y. Zhu; F. Xiao; X. Sun; Y. Kayano; Y. Kami
Oral presentation, English, 2017 IEICE General Conference, Domestic conference
Mar. 2017 - 回路論的手法を用いたBCIプローブのモデル化,” 電子情報通信学会技術研究報告
星野美咲; 上芳夫; 肖鳳超; タヤラニ マジド; 村野公俊
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jan. 2017 - 電源/GND層に挟まれた伝送線路の回路網方程式
浅川諒; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2016 - 伝送線路理論に基づく2組のツイストペアケーブルの伝送特性解析
小玉槙一; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2016 - 応答曲面法を用いたメッシュグラウンドを有する伝送線路パラメータの近似式化について
長尾和哉; 上芳夫; 石川晴雄; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2016 - 共振型無線電力伝送における送受信コイルの形状と伝送効率に関する一検討
土屋智樹; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2016 - ツイストペアケーブルの部分的不平衡とコモンモード電流
山村光卓; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2016 - チョークコイルの寄生抵抗成分を考慮したPSD手法によるEMIフィルタの設計
川上雅士; 石川晴雄; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2016 - BCI試験と平面波電磁界印加による伝送線路の感受性の比較検討
星野美咲; 上芳夫; 肖鳳超; Majid Tayarani; 村野公俊
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2016 - 3層基板における伝送線路と不完全な電源/グラウンド構造の結合
浅川諒; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2016 - RLGCパラメータのメタモデリングを用いた基板端のマイクロストリップ線路設計へのPSD設計手法の適応検討
長尾和哉; 川上雅士; 上芳夫; 石川晴雄; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2016 - 多線条線路理論による車載ワイヤーハーネスの伝送特性評価モデル
山村光卓; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, IEICE東京支部学生会研究発表会,, Domestic conference
Mar. 2016 - 種々のケーブルに対する多線条伝送線路モデルの適用についての一検討
山村光卓; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jan. 2016 - 選好度付セットベースデザイン（PSD）手法を用いたEMIフィルタ設計手法の検討
川上雅士; 上芳夫; 石川晴雄; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jan. 2016 - BCI試験を用いた平面波電磁界に対する伝送線路の感受性の推定方法の検討 ～理論的検討～
星野美咲; 上芳夫; 肖鳳超; タヤラニ マジド; 村野公俊
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jan. 2016 - PSD設計手法を用いる基板端での2本線路設計について
長尾和哉; 上芳夫; 肖鳳超; 石川晴雄; 川上雅士
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2015 - グラウンド近傍に配線されたツイストペアケーブルの伝送特性に関する簡易計算法
山村光卓; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2015 - EMIシミュレーションのための線路放射モデルの構築
肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,, Invited
Sep. 2015 - A surrogate model based algorithm for near-field reconstruction
Z. Huang; Y. Kami; F. Xiao
Oral presentation, English, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jul. 2015 - Study on application of the preference set-based design method to layout of microstrip lines with required performances
M. Kawakami; K. Nagao; H. Ishikawa; Y. Kami; F. Xiao
Oral presentation, English, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jun. 2015 - PWS法による近傍磁界2方向成分を用いた複素電磁界推定
川口真学; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Mar. 2015 - BCIプローブが装荷された伝送線路の解析モデルに関する検討
高田直樹; 上芳夫; 肖鳳超; Majid Tayarani; 村野公俊
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2015 - 電気設計におけるPSD手法適用の検討その1
川上雅士; 長尾和哉; 石川晴雄; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2015 - 電気設計におけるPSD手法適用の検討その2
長尾和哉; 川上雅士; 上芳夫; 肖鳳超; 石川晴雄
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2015 - 配線付きシリコン貫通ビアの等価回路モデルについて
橋本健司; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2015 - グラウンド平面近傍での被覆線路系のLCパラメータに関する考察
山村光卓; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2015 - メッシュグラウンドを有するマイクロストリップ線路の解析
大塚正人; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2015 - BCI試験における伝送線路の感受性に関する検討
高田直樹; 上芳夫; 肖鳳超; タヤラニマジド; 村野公俊
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jan. 2015 - 多層基板での差動線路におけるSI/PI協調解析の検討
川満悠生; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jan. 2015 - 線路断面のRLGCパラメータを用いたツイストペアケーブルの伝送特性解析モデル
山村光卓; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Dec. 2014 - ウエアラブル機器へのESDイミュニティ試験の検討
石田武志; 肖鳳超; 上芳夫; 藤原修; 仁田周一
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Nov. 2014 - シリコン貫通ビアからのEMIの導出に関する基礎検討
川上雅士; 橋本健司; 村野公俊; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ, Domestic conference
Jun. 2014 - ツイストペアケーブルの理論解析モデルについて
山村光卓; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,, Domestic conference
Mar. 2014 - スリットによるグラウンド層が分離した伝送線路系の等価回路モデル
川満悠生; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2013 - ガードトレースの差動信号配線への影響
熊谷弘和; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2013 - メッシュグラウンドを有するマイクロストリップ線路の特性
高塚伊万里; 小西佑典; 村野公俊; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2013 - グラウンド層に入ったスリットを跨ぐ伝送線路系の等価モデル
川満悠生; 上芳夫; 村野公俊; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2013 - スロットライン付きUWBフィルタの設計と評価
謝驥; 村野公俊; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2013 - 6ポート回路網を用いた近傍磁界測定法の提案
小林嵩; 村野公俊; 上芳夫; 肖 鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2012 - フラットケーブルの長尺線路効果について
後藤寿大; 村野公俊; 上芳夫; 肖 鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2012 - グラウンド層に欠損を有する差動線路の伝送特性
小西佑典; 村野公俊; 上芳夫; 肖 鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2012 - 広帯域ハイブリッドを使用した6ポート回路の複素電磁界測定の適用
南部隆之; 上芳夫; 肖鳳超; 村野公俊
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jul. 2012 - 結合2本線路からの放射電界の解析式
服部晃; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Mar. 2012 - 6ポート回路技術を用いた複素近傍電磁界測定の広帯域化
高津敏宏; 村野公俊; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Nov. 2011 - グラウンドスリットに平行なマイクロストリップ線路の等価回路
小西佑典; 村野公俊; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2011 - マイクロストリップ線路からの放射電界の一検討
服部晃; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2011 - 2組のグラウンドスリットを直交に跨ぐMSL伝送特性
鳥越誠司; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2011 - グラウンドスリットと平行なマイクロストリップ線路の伝送特性振
小西佑典; 村野公俊; 上芳夫; 肖鳳超
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jul. 2011 - 6ポート回路技術を用いたPCB近傍の複素磁界測定
高津敏宏; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2011 - 2組のディファレンシャルモード用配線間のクロストーク
大川康宏; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2011 - グラウンドスリットを直交に跨ぐ２組の結合線路の伝送特性
鳥越誠司; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2011 - グラウンドスリットと平行なマイクロストリップ線路の伝送特性
小西佑典; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2011 - PCB上での配置位置による2本線路対のクロストーク特性
大川康宏; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2011 - 6ポート回路技術を用いた近傍磁界測定
高津敏宏; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2011 - グランドスリットを交差する2組の平行な結合線路対での差動信号励振
鳥越誠司; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2011 - グランド層に入ったスリットを跨ぐ十分に離れた２組の結合２本線路間のクロストーク解析
鳥越誠司; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Oct. 2010 - 複素領域における近傍電磁界測定法の提案
高津敏弘; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jul. 2010 - 6ポート回路網による複素電磁界測定法の一提案
高津敏宏; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2010 - 感受性・放射イミュニティ特性測定用FM回転電磁界の発生法と基本特性
村野公俊; タヤラニマジド; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2010 - RFパルス回転電磁界を用いた感受性測定
村野公俊; タヤラニマジド; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2009 - 複素電磁界測定用6ポート回路網について
川上雅士; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2009 - 電力配線網におけるEMC問題を考えるための伝送線路論的手法
上芳夫; 肖鳳超; 村野公俊
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2009 - 複素量による磁界測定
川上雅士; 上芳夫; 肖鳳超; 村野公俊
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Dec. 2008 - 表面実装部品を用いた複素近傍磁界用位相測定装置
川上雅士; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2008 - 異層交差線路間におけるクロストーク
松田彰吾; S. W. Park; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2008 - PLC用ISNにおけるコモンモード電流とコモンモード電圧
小栗康範; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2008 - 放射イミュニティ・感受性測定用RFパルス回転電磁界の基本特性
村野公俊; タヤラニマジド; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2008 - 分岐を含む電力線回路網のLCL評価のための回路網表示
小栗康範; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2007 - グラウンド面にスロットのある2本の平行な非対称マイクロストリップ線路の伝送特性
永久保仁志; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2007 - Analysis of crosstalk between microstrip lines in arbitrary directions on different layers
S. W. Park; F. Xiao; D. C. Park; Y. Kami
Oral presentation, English, 電子情報通信学会ソサイエティ大会,
Sep. 2007 - 6ポート型VNA試作機
佐々田圭太; 松浦弘樹; 高橋圭; 山田恭一; 肖鳳超; 矢加部利幸
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2007 - 7ポート型コリレータの再評価
服部紘宜; 肖鳳超; 李可人; 矢加部利幸
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2007 - 4セプテタムTEMセルを用いたマイクロストリップ線路の感受性特性
川原弘子; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Dec. 2006 - 負荷回路を有する二本線路のLCL特性
小栗康範; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Nov. 2006 - 4セプタムTEMセルを用いた感受性評価法
川原弘子; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2006 - 多線条線路の時間領域におけるクロストーク解析
橋本良太; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2006 - 2本の平行な非対称マイクロストリップ線路の伝送特性
永久保仁志; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2006 - Coupling analysis for partially parallel lines of a straight and bent lines
S. W. Park; F. Xiao; D. C. Park; Y. Kami
Oral presentation, English, 電子情報通信学会ソサイエティ大会,
Sep. 2006 - 擬似的電力配線における負荷回路のLCL伝搬特性
小栗康範; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2006 - 2本の平行な非対称マイクロストリップ線路の伝送特性
永久保仁志; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jul. 2006 - 位相差分波器を用いない4 セプテムTEMセルの励振法
川原弘子; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2006 - Stitching Capacitorを用いたグラウンドに入ったスリットによる線路間クロストークの低減効果
肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2006 - 隣接する線路間のクロストーク
橋本良太; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2006 - 4セプテムTEMセルによる回転電磁界発生システム
川原弘子; 村野公俊; マジド タヤラニ; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jan. 2006 - グラウンドに入ったスロットによる線路間結合について(II)
中田洋平; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2005 - PCB多線条線路でのモード分解法について(I)
牧野修; 當山俊一郎; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2005 - PCB多線条線路でのモード分解法について(II)
當山俊一郎; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2005 - 多層基板における伝送線路間のクロストーク
橋本良太; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2005 - 画像復元手法による磁界ループプローブの誤差補正
今村雄介; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2005 - 4セプテムTEMセル内のターンテーブルによる電磁界への影響
川原弘子; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会,
Sep. 2005 - 多線条線路におけるクロストーク解析
當山俊一郎; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jul. 2005 - 多層基板における伝送線路間のクロストーク
橋本良太; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jun. 2005 - グラウンド面に隙間を有する折れ曲がり伝送線路のEMC特性
山田卓司; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2005 - 不均質媒質からなる伝送線路の長尺効果について
牧野修; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2005 - 近傍磁界測定用矩形ループプローブの誤差について
今村雄介; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2005 - 回路論的手法を用いたガードトレースによるクロストーク低減の解析
肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会,
Mar. 2005 - 近傍磁界測定用ループプローブの誤差について
今村雄介; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Dec. 2004 - 高さ方向に折れ曲がった伝送線路からの放射
山田卓司; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Oct. 2004 - グラウンド面に広い欠損を有するマイクロストリップラインの伝送特性
當山俊一郎; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Oct. 2004 - 4セプテムTEMセル内における電磁界分布
菅沼嘉光; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2004 - シールドなし4セプテムTEMセル内の電磁界分布
肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2004 - 曲がりのあるマイクロストリップ線路上のポインティングベクトル分布推定
今村雄介; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2004 - 影像法による折れ曲がり伝送線路からの放射の解析
山田卓司; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2004 - グラウンドに入ったスロットによる線路間結合について
中田洋平; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2004 - グラウンド面に欠損を有するマイクロストリップラインの放射損失特性
當山俊一郎; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2004 - グラウンドに入ったスリットによる線路間結合について－実験的検討－
中田洋平; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jul. 2004 - 近傍磁界測定による電界及びポインティングベクトル分布の推定
今村雄介; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jul. 2004 - グラウンド面に隙間を有する折れ曲がり伝送線路からの放射
山田卓司; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2004 - マイクロストリップラインと同軸ケーブルとの接合部のEMC基本特性
當山俊一郎; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2004 - 電磁界シミュレータの4セプテムTEMセルへの応用
肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2004 - 立体的な屈曲を持つ伝送線路の基本特性
山田卓司; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2003 - 4セプテムTEMセル内における回転電磁界の基本特性
菅沼嘉光; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2003 - 4セプテムTEMセルの伝送特性について
菅沼嘉光; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Jun. 2003 - 4セプテムTEMセルの回路網方程式と伝送特性
肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2003 - 有限長伝送線路の立ち上がり部の等価表現について
広瀬孝睦; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2003 - 電子機器筐体の遮蔽効果と感受性との関係について
三瓶毅; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会技術研究報告,EMCJ
Dec. 2002 - 遺伝的アルゴリズムによるファジィ推論を用いた手法
藤本真志; Tayarani Majid; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2002 - 開口を有するシールドケース内に配置した伝送線路の感受性評価
三瓶毅; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2002 - FDTD法を用いたスロット付き空洞共振器のイミュニティ特性解析
三瓶毅; 村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2002 - EUT挿入時におけるTEMセルの基本特性(2)
広瀬孝睦; 肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2001 - マイクロストリップ線路間の結合における地板の形状の影響
肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2001 - EUT挿入時におけるTEMセルの基本特性
村野公俊; 肖鳳超; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2001 - EUT形状によるTEMセルの電界分布への影響
肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2001 - 6ポートコリレータのドップラー効果を用いた超低速度測定への応用
原田真; 秦野芳宏; 肖鳳超; 矢加部利幸; 矢部初男
Oral presentation, Japanese, 電子情報通信学会総合大会
Mar. 2001 - セプテムの厚さを考慮したTEMセル高次モード遮断周波数の計算
肖鳳超; 村野公俊; 上芳夫
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2000 - 6ポートコリレータの電波到来方向測定への応用
矢加部利幸; 肖鳳超; 原田真; 矢部初男
Oral presentation, Japanese, 電子情報通信学会ソサイエティ大会
Sep. 2000 - Application of six-port correlator for Doppler frequency measurements
トニーファン; 秦野芳宏; 原田真; 肖鳳超; 矢加部利幸; 矢部初男
Oral presentation, Japanese, 2000 IEICE Society Conference
Sep. 2000 - An efficient boundary condition for finite element solution of open region electromagnetic scattering problems
F. Xiao; H. Yabe
Oral presentation, English, Technical Report of IEICE,AP
Nov. 1997 - Numerical dispersion characteristics of FDTD method in general curvilinear coordinates
F. Xiao; H. Yabe
Oral presentation, English, IEICE General Conference
Mar. 1997 - A new kind of millimeter wave tripler
F. Xiao; K. Gong; Z. Feng
Oral presentation, English, Proc. 1989 4th China Microwave Conference, (in Chinese), Chengdu, China
Nov. 1989
Courses
- 環境電磁工学特論
2024 - 宇宙通信工学
2024 - 基礎演習A
2024 - 電気電子生命実験 (明治大学)
2024 - 電磁気学第一
2024 - 基礎電磁気学
2024 - 環境電磁工学特論
2023 - 宇宙通信工学
2023 - 基礎演習A
2023 - 電気電子生命実験 (明治大学)
2023 - 電磁気学第一
2023 - 基礎電磁気学
2023 - 電磁気学第一演習
The University of Electro-Communications - 電磁気学第二演習
The University of Electro-Communications - 電磁気学第二演習
電気通信大学 - 電磁気学第一演習
The University of Electro-Communications - 電磁気学第一演習
電気通信大学
Research Themes
- kHz帯における無線電力伝送技術の伝送効率向上および不要放射低減に関する研究
UL Japan, Principal investigator, Domestic joint research
2014 - 2015 - Trial manufacture of a portable X-band six-port based vector network analyzer for two-port device measurement
YAKABE Toshiyuki; XIAO Fengchao
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (C), During the same two fiscal years, 2006 and 2007, both Grants-in-Aid for Scientific Research from Japan Society for the Promotion of Science (JSPS) and Grant for Practical Application of University R&D Results under the Matching Fund Method form New Energy and Technology Development Organization (NEDO) were adopted. Then, we have done with drawing a sharp line between these two projects. That is JSPS's research target is “Development of a prototype X-band six-port based VNA for universities student experimental program," as its title of project is “Trial manufacture of a portable X-band six-port based vector network analyzer for two-port device measurement." As excellent results, we published eleven papers including proceedings of international conferences, i. e., “Design of Bandpass Filters for UWB Wireless Systems ; Tenth Australian Symposium on Antennas, Feb.2007," and “Application of Particle Swarm Optimization for the Design of UWB Bandpass Filters ; IEEE International Symposium, June 2007," and “Spurious Emission Measurement with Wide Dynamic Range ; 11th International Symposium on Microwave and Optical Technology, Dec. 2007" and so on. On the other hand, NEDO's research and development target is “Wide application in various fields of high frequency industry using our six-port based measurement techniques." With both results, we are now researching in alternative applications as a frequency free measurement techniques., 18560408
2006 - 2007
Industrial Property Rights
- 線形マルチポートのシステムパラメータの測定方法及び装置、ベクトルネットワークアナライザを用いた測定方法並びにプログラム
Patent right, 矢加部利幸, 矢部初男, 近藤昭治, 肖鳳超, 高橋圭, 山田恭一, 特願2007-23613, Date applied: 12 Sep. 2007, 矢加部利幸，矢部初男，近藤昭治，肖鳳超，高橋圭，山田恭一, 特開2009-068932, Date announced: 02 Apr. 2009, 特開2009-068932, Date published: 02 Apr. 2009, 特開2009-068932, Date issued: 02 Apr. 2009
