Updated on 2024/03/27

 
MATSUSHIMA Tohlu
 
Scopus Paper Info  
Total Paper Count: 0  Total Citation Count: 0  h-index: 5

Citation count denotes the number of citations in papers published for a particular year.

Affiliation
Faculty of Engineering Department of Electrical and Electronic Engineering
Job
Associate Professor
External link

Research Interests

  • 環境電磁工学

  • EMC

Degree

  • Okayama University  -  Doctor of Engineering   2009.09

Biography in Kyutech

  • 2018.02
     

    Kyushu Institute of Technology   Faculty of Engineering   Department of Electrical and Electronic Engineering   Associate Professor  

Papers

  • Compensating Method of Equivalent Current Sources of LSI-Core Macromodel Considering Voltage Fluctuations in On-Chip Power Distribution Network Reviewed International journal

    Tanaka H., Matsushima T., Yano Y., Wada O.

    IEEE Transactions on Electromagnetic Compatibility   64 ( 4 )   1250 - 1256   2022.01

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    DOI: 10.1109/TEMC.2022.3155471

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  • Transmission Characteristic Evaluation of Distribution Board in High-Speed Power Line Communication Reviewed

    WAKISAKA Toshiyuki, MATSUSHIMA Tohlu, ENOKI Ryoya, KUWABARA Nobuo, FUKUMOTO Yuki

    J106-B ( 8 )   498 - 508   2023.08

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    Today, with the increasing demand for IoT, there is a growing demand for high-speed power line communication (PLC) in large-scale facilities such as factories. So far, many studies have been conducted on the transmission characteristics of single-phase power lines in general households. and transmission characteristics including cross-phase communication have not been clarified. Therefore, in this paper, regarding transmission characteristics via distribution boards used in large-scale facilities such as factories, we first examine the signal propagation characteristics of a single breaker, showed that the mode S-parameter value increased. Then, we examined how the number of branches affects communication via distribution boards by measurement and analysis, and showed that in any case, it is close to 1/number of branches. By estimating the transmission characteristics via the distribution board according to the contents of this paper, it is possible to estimate the location where the PLC repeater should be installed.

    DOI: 10.14923/transcomj.2022pep0001

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  • Simple Comparison Method of Countermeasure Effect for Common Mode Filter on Radiated Emission Considering Conversion from Differential Mode to Common Mode Reviewed

    KIKUCHI Koichi, MUNEMOTO Yu, MATSUSHIMA Tohlu, KUWABARA Nobuo, FUKUMOTO Yuki

    J106-B ( 8 )   519 - 526   2023.08

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    Each mixed-mode S-parameter of CMF has a phase characteristic, the phases are not the same, and the CMFs cannot be simply compared. In this study, as one way to confirm the usefulness of CMFs, we found a formula for equivalent common-mode voltage VEQ and calculated VEQ of each CMF for a square wave. Radiated emission levels were then evaluated by measuring CISPR 25. As a result, it was found that the magnitude relationship is the same as that of the equivalent common mode voltage VEQ.

    DOI: 10.14923/transcomj.2022pep0009

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  • 海中における伝送特性を用いた Wavelet-OFDM 通信の通信速度推定 Reviewed

    元村 史龍, 仙波 拓人, 桑原 堅誠, 脇坂 俊幸, 松嶋 徹, 福本 幸弘

    エレクトロニクス実装学術講演大会講演論文集 ( 一般社団法人エレクトロニクス実装学会 )   37 ( 0 )   14A5-4   2023.03

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    DOI: 10.11486/ejisso.37.0_14a5-4

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  • On-Chip Power Integrity Simulation Using LSI-Core Macromodels Considering Voltage Fluctuations Caused by Inter-Function-Block Interference Reviewed

    Tanaka H., Matsushima T., Yano Y., Wada O.

    IEEE Transactions on Electromagnetic Compatibility   65 ( 1 )   334 - 342   2023.02

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    DOI: 10.1109/TEMC.2022.3224704

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  • Underwater Live Video Streaming Experiment Using Radio Frequency Communication for AUVs Reviewed

    Alahmad R., Nishida Y., Ishii K., Fukumoto Y., Matsushima T.

    Proceedings of International Conference on Artificial Life and Robotics   499 - 503   2023.01

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  • Experimental Study of Wavelet-OFDM Radio Communication System for AUVs Under Seawater Reviewed

    Hasaba R., Eguchi K., Wakisaka T., Satoh H., Hirokawa J., Hirose M., Matsushima T., Fukumoto Y., Nishida Y., Ishii K.

    17th European Conference on Antennas and Propagation, EuCAP 2023   2023.01

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    DOI: 10.23919/EuCAP57121.2023.10133725

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  • Experimental Study of Underwater RF Communication for Live Video Transmission for AUVs Application Reviewed

    Alahmad Raji, Ishii Kazuo, Nishida Yuya, Fukumoto Yuki, Matsushima Tohlu

    Journal of Robotics, Networking and Artificial Life ( ALife Robotics Corporation Ltd. )   10 ( 1 )   84 - 90   2023.01

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    Autonomous Underwater Vehicles (AUVs) require long-distance communication, especially in the deep sea. Acoustics communication and wireless optical communication have limitations of low latency and water conditions effects respectively. Radiofrequency (RF) communication provides a high data rate with free orientation of the transmitter/receiver antennas. However, electromagnetic waves are highly restricted by high attenuation over short distances in the underwater medium. In this study, we investigated the RF communication in a tank full of seawater. A loop antenna and rectangular antenna were used for the base station and AUV respectively. The experiments were conducted to measure the transmission rate with different distances between the base station and the AUV using both User Datagram Protocol (UDP) and Transmission Control Protocol (TCP). Live video streaming with framerate analysis was considered. The results show the effect of the distance between the transmitter and receiver on the transmission rate, in addition, to the antenna's stability has huge effects on the connection stability. We successfully achieved a High-Definition (HD) video streaming with 25fps for over 1 meter.

    DOI: 10.57417/jrnal.10.1_84

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  • Evaluation of Transmission Attenuation in Glass with Varying Angle of Incidence for 28 GHz Band Reviewed

    Tsunenari S., Matsushima T., Fukumoto Y.

    Asia-Pacific Microwave Conference Proceedings, APMC   491 - 493   2023.01

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    DOI: 10.1109/APMC57107.2023.10439778

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  • Comparison of Suppression Effect by CMF for UTP and STP Lines Using Chain Parameter Matrix Reviewed

    Kuwabara N., Matsushima T., Fukumoto Y.

    2023 IEEE Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMC+SIPI 2023   196 - 201   2023.01

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    DOI: 10.1109/EMCSIPI50001.2023.10241556

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  • Common-mode Current Converted from PLC Signal in Three-phase Distribution Network with Earth Leakage Circuit Breaker Reviewed

    Enoki R., Wakisaka T., Matsushima T., Fukumoto Y.

    IEEE International Symposium on Electromagnetic Compatibility   2023-September   2023.01

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    DOI: 10.1109/EMCEurope57790.2023.10274371

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  • Analysis of Common-mode Voltage during Switching of Individual IGBTs in Three-phase Inverter Reviewed

    Fujimura M., Matsushima T., Fukumoto Y., Takada K., Kobayashi K.

    IEEE International Symposium on Electromagnetic Compatibility   2023-September   2023.01

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    DOI: 10.1109/EMCEurope57790.2023.10274203

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  • Analysis Method of Transmission Characteristics between Coil Antennas for Short-Range Wireless Communication

    Wakisaka Toshiyuki, Kuwahara Kensei, Semba Takuto, Matsushima Tohlu, Fukumoto Yuki

    Journal of The Japan Institute of Electronics Packaging ( The Japan Institute of Electronics Packaging )   25 ( 4 )   309 - 313   2022.07

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    DOI: 10.5104/jiep.25.309

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  • Quantitative Evaluation of Reflection Characteristics of Power Distribution Equipment during TDR Measurement Reviewed

    Uejima Hiroaki, Matsushima Tohlu, Hisakado Takashi, Wada Osami

    IEEJ Transactions on Power and Energy ( The Institute of Electrical Engineers of Japan )   142 ( 2 )   139 - 149   2022.02

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    <p>The authors propose an effective method of fault location utilizing TDR measurement in overhead distribution systems. Past studies have shown that reflected waves from accident points such as short circuits, ground faults, and disconnections can be observed in overhead distribution systems. In addition, it is known that the retaining insulators and pulling insulators of overhead power distribution line cause reflected wave because these equipment act as capacitor. On the other hand, although there are many other distribution facilities, the reflection characteristics cannot be evaluated quantitatively. Based on the above, the purpose of this study is to create an equivalent circuit model for TDR measurement for various distribution facilities existing in the overhead distribution system. For modeling, an equivalent circuit model is created by the power system instantaneous value analysis program XTAP, and the experimental results and simulation results are compared and evaluated.</p>

    DOI: 10.1541/ieejpes.142.139

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  • Rapid Calculation Method of Three-Dimensional Communication Range in HF Broadband Communication System Reviewed

    Kuwahara K., Fukumoto Y., Matsushima T., Wakisaka T.

    2022 IEEE International Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMCSI 2022   106 - 111   2022.01

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    DOI: 10.1109/EMCSI39492.2022.9889342

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  • Analysis of CM-Signal Suppression Effect from DM Signal by Common-Mode Choke Coil Using Chain-Parameter Matrix Reviewed

    Kuwabara N., Matsushima T., Fukumoto Y.

    2022 IEEE International Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMCSI 2022   181 - 186   2022.01

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    DOI: 10.1109/EMCSI39492.2022.9889495

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  • Basic Study of Communication System in Seawater Using Magnetic Field Coupler and Wavelet OFDM Reviewed

    Hasaba R., Eguchi K., Wakisaka T., Sato H., Hirokawa J., Hirose M., Matsushima T., Fukumoto Y.

    Asia-Pacific Microwave Conference Proceedings, APMC   2022-November   488 - 489   2022.01

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  • Circuit analysis of common mode current in coupling coils for HF broadband communication system Reviewed

    Matsushima T., Kuwahara K., Fukumoto Y.

    2022 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2022   19 - 21   2022.01

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    DOI: 10.1109/APEMC53576.2022.9888658

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  • Electromagnetic Noise Evaluation of Transceiver IC and Communication Modules in CAN-FD Communication Reviewed

    Nishida S., Matsushima T., Fukumoto Y.

    2022 IEEE CPMT Symposium Japan, ICSJ 2022   76 - 79   2022.01

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    DOI: 10.1109/ICSJ55786.2022.10034693

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  • A Design Method for the Loop Antenna to Control a Range of HF-Broadband Wireless Communication Reviewed

    Proceedings of JIEP Annual Meeting ( The Japan Institute of Electronics Packaging )   36 ( 0 )   24B5-1   2022.01

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    DOI: 10.11486/ejisso.36.0_24b5-1

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  • Fault Location in 6.6kV Overhead Distribution System by Comparing TDR Waveforms Before and After Failure Reviewed

    Taketani Daisuke, Sasaoka Tsuyoshi, Kayo Zuien, Matsushima Tohlu, Hisakado Takashi, Wada Osami

    IEEJ Transactions on Power and Energy ( The Institute of Electrical Engineers of Japan )   141 ( 9 )   590 - 596   2021.09

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    <p>The authors propose an effective method of fault location in overhead distribution system. In past studies, short pulse with high frequency injected into overhead distribution system can propagate through about 1km distance, but it has been a problem that pulse reflect at other than a fault point. In other words, it is necessary to find out a fault point from multiple reflected waves. In our proposed method, it is possible to extract a change of a fault point by comparing TDR (Time Domain Reflectometry) waveforms before and after failure. In this paper, we clarify theoretical concept and organize the algorithm of comparing TDR waveforms. Moreover we verify effectiveness of the proposed method by experiments in real-scale distribution system after confirming pulse transmission properties of section switch. The verification results show that the proposed method can locate a fault point (short-circuit fault or ground fault) with accuracy of tens of meters or less.</p>

    DOI: 10.1541/ieejpes.141.590

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  • Single-Conductor Transmission Line Model Incorporating Radiation Reaction Reviewed International journal

    Tashiro D., Hisakado T., Matsushima T., Wada O.

    IEEE Transactions on Electromagnetic Compatibility   63 ( 4 )   1065 - 1077   2021.08

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    DOI: 10.1109/TEMC.2020.3041468

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  • Calculation of Radiated Emission from STP Cable by Chain-Parameter-Matrix Reviewed

    Kuwabara N., Matsushima T., Fukumoto Y.

    2021 Joint IEEE International Symposium on Electromagnetic Compatibility Signal and Power Integrity, and EMC Europe, EMC/SI/PI/EMC Europe 2021   1087 - 1092   2021.07

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    DOI: 10.1109/EMC/SI/PI/EMCEurope52599.2021.9559295

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  • Simulation of mode division multiplex transmission method in shielded four-wire cable Reviewed

    Matsushima T., Sato T., Fukumoto Y., Kuwabara N.

    2021 Joint IEEE International Symposium on Electromagnetic Compatibility Signal and Power Integrity, and EMC Europe, EMC/SI/PI/EMC Europe 2021   570 - 574   2021.07

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    DOI: 10.1109/EMC/SI/PI/EMCEurope52599.2021.9559178

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  • Common-mode Reduction Method of LVDS by Imbalance Difference Control Reviewed

    WADA Osami, SAITO Hiroaki, YANO Yusuke, HISAKADO Takashi, MATSUSHIMA Tohlu

    J104-B ( 6 )   453 - 460   2021.06

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    Considering that the LVDS (Low Voltage Differential Signaling) driver is a current differential drive system, we propose a method to reduce common mode generation when the transmission system not perfectly balanced is driven by the LVDS driver. The common mode of the unbalanced system is reduced by adding a simple balance compensation circuit using resistors. Simulations and experiments show that the common mode generation can be significantly reduced even in a system where the degree of imbalance deviates considerably from 0.5. For the quasi-differential transmission system with LVDS driver and balance compensation, we confirmed the reduction of common-mode potential fluctuation by experiments.

    DOI: 10.14923/transcomj.2020pep0007

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  • Evaluation of influence to electromagnetic environment on outside of building by PLC system using three-wire three-phase power line Reviewed

    Wakisaka T., Matsushima T., Koga H., Okumura H., Kuwabara N., Fukumoto Y.

    Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)   214 ( 2 )   2021.06

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    DOI: 10.1002/eej.23324

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  • Evaluation of influence to electromagnetic environment on outside of building by PLC system using three‐wire three‐phase power line Reviewed

    Wakisaka Toshiyuki, Matsushima Tohlu, Koga Hisao, Okumura Hiroyuki, Kuwabara Nobuo, Fukumoto Yuki

    Electrical Engineering in Japan ( Wiley )   214 ( 2 )   2021.02

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  • Circuit analysis of radiation reaction in metamaterials by retarded electromagnetic coupling Reviewed

    Nakata R., Hisakado T., Matsushima T., Wada O.

    IET Circuits, Devices and Systems   16 ( 4 )   311 - 321   2021.01

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    DOI: 10.1049/cds2.12104

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  • Transmission line pulse method with arbitrary characteristic impedance for immunity evaluation of ESD protection device Reviewed

    Tanaka K., Matsushima T., Fukumoto Y.

    2021 IEEE CPMT Symposium Japan, ICSJ 2021   21 - 24   2021.01

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    DOI: 10.1109/ICSJ52620.2021.9648864

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  • Communication Distance Estimation for Power Line Communication Using Various Differently Constituted Power Cables Reviewed

    Fukumoto Y., Oshikawa K., Matsushima T., Kuwabara N., Wakisaka T.

    IEEJ Transactions on Electrical and Electronic Engineering   17 ( 4 )   498 - 505   2021.01

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/tee.23535

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  • Equivalent Circuit of Common-Mode Choke Coil Considering with Conversion from Differential-Mode Signal to Common-Mode Disturbance Reviewed International journal

    Kuwabara N., Matsushima T., Fukumoto Y.

    2021 13th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMC Compo 2021   59 - 64   2021.01

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    DOI: 10.1109/EMCCompo52133.2022.9758620

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  • Verification of fault location by TDR measurement on an actual line including multiple ground-mounted equipment Reviewed

    Oasa J., Yamanaka M., Higashiyama S., Inaoka Y., Hisakado T., Wada O., Matsushima T., Hirayama T., Yamaoka K.

    IET Conference Proceedings   2021 ( 6 )   1274 - 1278   2021.01

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    DOI: 10.1049/icp.2021.2100

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  • Experimental investigation of communication quality degradation of 1000BASE-T1 by pulse disturbance Reviewed

    Yano Yusuke, Matsushima Tohlu, Wada Osami

    IEICE Communications Express ( The Institute of Electronics, Information and Communication Engineers )   9 ( 12 )   593 - 598   2020.12

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    <p>Adverse effect of pulse disturbances on the communication quality is investigated experimentally on in-vehicle Ethernet (1000BASE-T1, IEEE 802.3bp). Common- and differential-mode pulse disturbances were injected into communication cables by a method referring to the coupling network described in IEC 62228-5. As a result, it was revealed that steep change of differential signal due to pulse disturbance degrades the communication quality at a specific pulse width.</p>

    DOI: 10.1587/comex.2020COL0019

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  • Evaluation of Influence to Electromagnetic Environment on Outside of Building by PLC System using Three-wire Three-phase Power Line Reviewed

    Wakisaka Toshiyuki, Matsushima Tohlu, Koga Hisao, Okumura Hiroyuki, Kuwabara Nobuo, Fukumoto Yukihiro

    IEEJ Transactions on Fundamentals and Materials ( The Institute of Electrical Engineers of Japan )   140 ( 12 )   557 - 564   2020.12

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    <p>In this paper, the influence to electromagnetic environment was evaluated on the outside of buildings where power line communication (PLC) systems were installed to a three-wire three-phase power distribution line. The electric field strength was measured at 140 points in five factories, in two office buildings, and in one stadium. Since many radio waves existed in the environment, the electric field strength when PLC system was operated and was not operated was measured. The influence was evaluated by the cumulated occurrence probability because the frequency characteristics of the electric filed strength changed by the measurement points. The results showed that the occurrence probability was not changed when the PLC system was operated and was not operated. The electric field strength was calculated by the common mode current obtained from the test result, and this indicated that the occurrence probability was lower than the measured occurrence probability of electric field strength.</p>

    DOI: 10.1541/ieejfms.140.557

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  • Evaluation of the magnetic field strength by using a scale model for power line communication Reviewed

    Dai-ichiro Koike, Hiroyuki Okumura, Tohlu Matsushima, Yuki Fukumoto

    International Conference on Emerging Technologies for Communications   2020.12

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  • TDR simulation using equivalent circuit of actual power distribution network to detect ground fault Reviewed International journal

    Fumikazu Kobayashi, Tohlu Matsushima, Yuki Fukumoto

    International Conference on Emerging Technologies for Communications   2020.12

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  • Differential-/Common-Mode Conversion Loss and LCL/TCL Measurement Methods Reviewed

    Matsushima T., Sugiura A., Wada O.

    IEEE Transactions on Electromagnetic Compatibility   62 ( 5 )   1830 - 1839   2020.10

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    DOI: 10.1109/TEMC.2019.2958935

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  • Analysis of Cable Length Dependency on Common Mode Current by Using Scale Model for Power Line Communication Reviewed

    Koike D.I., Okumura H., Matsushima T., Fukumoto Y., Kuwabara N.

    Proceedings of the 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020   2020.09

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    DOI: 10.1109/EMCEUROPE48519.2020.9245868

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  • Investigation of Multi-Cable Effect to Radiated Emission from Cable Used for Power Line Communication Reviewed

    Matsushima T., Okumura H., Kuwabara N., Iwasaki M., Koike D.I., Fukumoto Y.

    Proceedings of the 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020   2020.09

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    DOI: 10.1109/EMCEUROPE48519.2020.9245704

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  • Cancellation of common-mode excitation by SCD21and SCC21of CMF due to phase relationship between DM and CM voltages Reviewed

    Matsushima T., Kikuchi K., Ishibashi K., Fukumoto Y., Kuwabara N.

    Proceedings of the 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020   2020.09

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    DOI: 10.1109/EMCEUROPE48519.2020.9245809

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  • Method of implementing radiation resistance to analysis model for radiated emission using chain parameter matrix Reviewed

    Kuwabara Nobuo, Matsushima Tohlu, Fukumoto Yuki

    IEICE Communications Express ( The Institute of Electronics, Information and Communication Engineers )   9 ( 9 )   446 - 450   2020.09

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    <p>The analysis method using the chain parameter matrix (F-matrix) has been proposed for calculating radiated emission from the cable used by power line communication (PLC). In this paper, the radiation resistance was implemented to the F-matrix as the load of the common mode current which was converted from the differential mode PLC signal by the unbalance of the transmission system and was considered as the emission source. The calculated result for the simple cable model was compared to the measurement value and to the calculation value of which the radiation resistance was not considered. The investigation result indicated that the influence of radiation resistance appeared at the frequency where the high radiated emission was observed.</p>

    DOI: 10.1587/comex.2020XBL0070

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  • TDR Measurement with Corresponding to Utility-Pole Span Resolution for Fault Location in Real-Scale Distribution System Reviewed

    Oe Shinpei, Uejima Hiroaki, Sasaoka Tsuyoshi, Matsushima Tohlu, Hisakado Takashi, Wada Osami

    IEEJ Transactions on Power and Energy ( The Institute of Electrical Engineers of Japan )   140 ( 9 )   662 - 667   2020.09

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    <p>The authors propose a new and more efficient method to search for fault points by injected short pulse with high frequency into distribution line. This method, which is called as TDR measurement, enables to find the fault point easily by measuring propagation time of the pulse reflected due to impedance change at the fault point. In this paper, the proposed method is experimented in real-scale distribution system with about 700m distance which is isolated by DAS (Distribution Automation System) as outage area. The measurement result shows that an injected pulse with corresponding to utility pole span resolution is able to propagate through about 700m distance, and each reflected wave by several brunches and terminals is observed clearly in the real-scale distribution system. And the measurement result corresponds with the simulation result of the test equivalent circuit model. Moreover, the authors measured reflected waves from a fault point (short circuit, broken wire, or grounding) in test circuit. As the results, reflected waves from every fault point were confirmed by simulation, and they depend on the fault type. We calculated the fault location from the pulse velocity and the propagation time of the reflected wave, and the result nearly corresponded to the actual setting. In addition, the measured wave corresponds to the simulation result using equivalent circuit model of each fault point.</p>

    DOI: 10.1541/ieejpes.140.662

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  • Measurement of throughput degradation due to pulse disturbance in power line communication Reviewed International journal

    Kyoko Kadoyoshi,Kazumasa Oshikawa,Toshiyuki Wakisaka,Tohlu Matsushima,Yuki Fukumoto

    In 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE   2020.09

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  • Influence of S_{{cd}21} Characteristics of Common-Mode Filter on Radiated Emission from UTP Cable Reviewed

    Kikuchi K., Matsushima T., Ishibashi K., Kuwabara N., Fukumoto Y.

    2020 IEEE International Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMCSI 2020   386 - 391   2020.07

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    DOI: 10.1109/EMCSI38923.2020.9191645

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  • Measurement of Differential Mode Impedance and Longitudinal Conversion Loss for In-Factory High-Speed PLC System using Three-Phase Power Distribution System Reviewed

    Wakisaka T., Matsushima T., Okumura H., Koga H., Kuwabara N., Fukumoto Y.

    2020 IEEE International Symposium on Power Line Communications and its Applications, ISPLC 2020   2020.05

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    DOI: 10.1109/ISPLC48789.2020.9115393

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  • Characteristics of Radiated Emission by PLC Signal from Three-wire Power Cable Reviewed

    Kuwabara N., Matsushima T., Fukumoto Y., Okumura H.

    EMC Europe 2019 - 2019 International Symposium on Electromagnetic Compatibility   267 - 272   2019.09

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    DOI: 10.1109/EMCEurope.2019.8872015

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  • Peer-to-Peer Energy Transfer by Power Gyrators Based on Time-Variable-Transformer Concept Reviewed

    Kiss D., Hisakado T., Matsushima T., Wada O.

    IEEE Transactions on Power Electronics   34 ( 8 )   8230 - 8240   2019.08

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    DOI: 10.1109/TPEL.2018.2882129

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  • Design for reduction of far-end crosstalk in four-channel differential transmission line using per-unit-length parameters Reviewed

    Matsushima T., Hisakado T., Wada O., Matsuda A., Hirano T.

    2019 Joint International Symposium on Electromagnetic Compatibility, Sapporo and Asia-Pacific International Symposium on Electromagnetic Compatibility, EMC Sapporo/APEMC 2019   808 - 811   2019.06

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    DOI: 10.23919/EMCTokyo.2019.8893837

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  • Calculation of Electromagnetic Field Radiated from Power Line Communication of Three Wires System Reviewed

    Yamamoto T., Okumura H., Wakisaka T., Matsushima T., Kuwabara N., Fukumoto Y.

    2019 Joint International Symposium on Electromagnetic Compatibility, Sapporo and Asia-Pacific International Symposium on Electromagnetic Compatibility, EMC Sapporo/APEMC 2019   704 - 707   2019.06

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    DOI: 10.23919/EMCTokyo.2019.8893771

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  • 非対称スイッチング電源回路に対するインピーダンスバランス法によるコモンモードノイズ低減 Reviewed

    西本太樹, 山岡正拓, 山田徹, 松嶋徹, 和田修己

    電子情報通信学会論文誌B   J102-B ( 3 )   184 - 193   2019.03

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    DOI: 10.14923/transcomj.2017pei0002

  • 帯域制限されたDSSS/CCK/OFDM変調に対する狭帯域干渉波の周波数の違いを考慮したPER推定と最適方式選択 Reviewed

    高谷和宏, 奥川雄一郎, 富田大將, 梅田康希, 松嶋徹, 小川将克, 久門尚史, 和田修己

    電子情報通信学会論文誌 B   J102-B ( 3 )   2019.03

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    DOI: 10.14923/transcomj.2018PEP0007

  • Formulation of single-conductor transmission line model with feedback electric fields by terminal discontinuity Reviewed

    Tashiro D., Hisakado T., Matsushima T., Wada O.

    Asia-Pacific Microwave Conference Proceedings, APMC   2018-November   642 - 644   2019.01

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    DOI: 10.23919/APMC.2018.8617551

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  • Topological estimation of resonant frequencies by equivalent circuit for star meta-atoms Reviewed

    Hasegawa A., Hisakado T., Matsushima T., Wada O.

    Asia-Pacific Microwave Conference Proceedings, APMC   2018-November   201 - 203   2019.01

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    DOI: 10.23919/APMC.2018.8617226

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  • Fukumoto/Matsushima Laboratory, Department of Electrical and Electronic Engineering, School of Engineering, Kyushu Institute of Technology

    Fukumoto Yukihiro, Matsushima Tohlu

    Journal of The Japan Institute of Electronics Packaging ( The Japan Institute of Electronics Packaging )   22 ( 7 )   622 - 622   2019.01

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    DOI: 10.5104/jiep.22.622

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  • Experimental study of the relationship between maximum common mode current and maximum magnetic field strength using a simple power distribution line model Reviewed

    Okumura Hiroyuki, Matsushima Tohlu, Kuwabara Nobuo, Yamamoto Takeshi, Wakisaka Toshiyuki, Fukumoto Yuki

    IEICE Communications Express ( The Institute of Electronics, Information and Communication Engineers )   8 ( 5 )   178 - 183   2019.01

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    <p>The relation between maximum common mode current and maximum radiated magnetic field strength was experimentally studied using a simple power distribution line model. The common mode current was measured along the cable and the radiated magnetic field strength was measured around the model. They were evaluated using the <i>S</i><sub>21</sub> parameter. The frequency characteristic of both the maximum current and the maximum strength showed a closely similar pattern. Our evaluation of their correlation indicated that the relation between the maximum common mode current and the maximum radiated magnetic field strength could be represented by a straight line, and that 80% of the measured data was contained within 2 dB of the regression line.</p>

    DOI: 10.1587/comex.2019XBL0004

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  • 妨害波パラメータに対するEthernet通信のパケットエラーレートの変化 Reviewed

    石橋 健太, 松嶋 徹, 福本 幸弘

    Proceedings of JIEP Annual Meeting ( The Japan Institute of Electronics Packaging )   33 ( 0 )   12C2 - 4   2019.01

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    DOI: 10.11486/ejisso.33.0_12C2-04

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  • モーメント法を用いた高周波電流測定用ロゴスキーコイルの設計 Reviewed

    押川 和正, 桑原 伸夫, 福本 幸弘, 松嶋 徹, 脇坂 俊幸

    Proceedings of JIEP Annual Meeting ( The Japan Institute of Electronics Packaging )   33 ( 0 )   11D3 - 2   2019.01

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    DOI: 10.11486/ejisso.33.0_11D3-02

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  • Electromagnetic Compatibility of Wired Communication for IoT Devices Reviewed

    Matsushima Tohlu

    Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers )   2019 ( 0 )   1 - 1   2019.01

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    DOI: 10.12792/iiae2019.001

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  • Measurement of Transmission Characteristics for Long-distance Power Line Communication Reviewed

    Ohara Soichiro, Kobayashi Fumikazu, Oshikawa Kazumasa, Wakisaka Toshiyuki, Matsushima Tohlu, Fukumoto Yuki

    Proceedings of IIAE Annual Conference ( The Institute of Industrial Applications Engineers )   2019 ( 0 )   41 - 41   2019.01

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    DOI: 10.12792/iiae2019.022

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  • Equivalent-circuit model with retarded electromagnetic coupling for meta-atoms of wired metallic spheres Reviewed

    OHISHI Katsuya, HISAKADO Takashi, MATSUSHIMA Tohlu, WADA Osami

    IEICE Transactions on Electronics ( The Institute of Electronics, Information and Communication Engineers )   E101C ( 12 )   923 - 930   2018.12

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    <p>This paper describes the equivalent-circuit model of a metamaterial composed of conducting spheres and wires. This model involves electromagnetic coupling between the conductors, with retardation. The lumped-parameter equivalent circuit, which imports retardation to the electromagnetic coupling, is developed in this paper from Maxwell's equation. Using the equivalent-circuit model, we clarify the relationship between the retardation and radiation loss; we theoretically demonstrate that the electromagnetic retardation in the near-field represents the radiation loss of the meta-atom in the far-field. Furthermore, this paper focuses on the retarded electromagnetic coupling between two meta-atoms; we estimate the changes in the resonant frequencies and the losses due to the distance between the two coupled meta-atoms. It is established that the dependence characteristics are significantly affected by electromagnetic retardation.</p>

    DOI: 10.1587/transele.E101.C.923

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  • Modal analysis of reflection of TDR in overhead distribution lines Reviewed

    Matsushima T., Hisakado T., Wada O., Oe S., Sasaoka T.

    2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018   523 - 526   2018.06

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    DOI: 10.1109/ISEMC.2018.8393833

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  • Validation of prediction method of common-mode current reduction based on imbalance difference model for differential transmission line placed near edge of adjacent ground plane Reviewed

    Matsushima Tohlu, Watanabe Tetsushi, Toyota Yoshitaka, Koga Liuji R., Wada Osami

    Journal of The Japan Institute of Electronics Packaging ( The Japan Institute of Electronics Packaging )   21 ( 2 )   178 - 185   2018.01

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    The electric asymmetry of a pair of differential transmission lines placed near an adjacent ground edge causes unwanted electromagnetic radiation when the adjacent ground width changes. In this paper, the imbalance difference model which has been proposed by the authors is verified by experiment and full-wave simulation for asymmetric differential transmission lines at different distances from the adjacent ground edge. The difference in secondary-common mode current in terms of the distance from the ground edge coincides with an error of up to 3 dB among the imbalance difference model, measurement, and electromagnetic simulation. Therefore the imbalance difference model has sufficient accuracy for practical use in designing differential transmission lines which produce less undesired emissions.

    DOI: 10.5104/jiep.21.178

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  • RF immunity test of CAN FD Transceivers during Data-Frame Communication

    Kawanishi K., Matsushima T., Hisakado T., Wada O.

    IEEE Electromagnetic Compatibility Magazine   7 ( 1 )   51 - 55   2018.01

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    DOI: 10.1109/MEMC.0.8339543

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  • Trends of EMC standards for automotive network devices and communication quality of ethernet in relation to parameters of pulse disturbances

    Matsushima S., Matsushima T., Hisakado T., Wada O.

    IEEE Electromagnetic Compatibility Magazine   7 ( 1 )   46 - 50   2018.01

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    DOI: 10.1109/MEMC.0.8339542

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  • TDR measurement with utility-pole-distance resolution in overhead distribution system Reviewed

    Oe Shinpei, Sasaoka Tsuyoshi, Matsushima Tohlu, Hisakado Takashi, Wada Osami

    IEEJ Transactions on Power and Energy ( The Institute of Electrical Engineers of Japan )   138 ( 9 )   766 - 771   2018.01

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    <p>It is necessary to detect a fault point in overhead distribution system for failure restoration. To search the fault point effectively and precisely, we apply TDR (Time Domain Reflectometry) measurement with utility-pole-distance resolution. In this method, we inject a pulse wave into distribution lines and measure the reflection. In this paper, the authors confirm propagation characteristics of overhead distribution system and compare the measurement of the reflected wave with the simulation result. Through the experiments, the authors confirm an influence of parasitic capacitances in overhead distribution facilities such as a transformer and a switchgear. When distribution facility is not connected with distribution line, the reflected wave from every utility pole and the end terminal are observed; the reflected waves from every utility pole are caused by parasitic capacitors between the distribution lines and cross arms. When distribution facility such as a transformer and a switchgear is connected with distribution line, the reflected waves caused by these facilities are observed. As a result, we confirmed that parasitic capacitances of distribution facilities affect the propagation characteristics of distribution failure pulse wave. In addition, the authors developed a simulation tool to evaluate the propagation characteristics of the pulse wave in the overhead distribution system based on the result utilizing the test distribution system, and confirmed that the simulation results corresponded to the measurement results.</p>

    DOI: 10.1541/ieejpes.138.766

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  • Analysis of dispersion splitting on light line by characteristic roots of retarded circuit equation Reviewed

    Nakata R., Hisakado T., Matsushima T., Wada O.

    Progress in Electromagnetics Research Symposium   2017-November   2405 - 2409   2017.11

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    DOI: 10.1109/PIERS-FALL.2017.8293540

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  • Comparison of voltage sources with current sources on unbalanced differential microstrip line Reviewed

    Saito H., Matsushima T., Hisakado T., Wada O.

    2017 International Symposium on Electromagnetic Compatibility - EMC EUROPE 2017, EMC Europe 2017   2017.11

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    DOI: 10.1109/EMCEurope.2017.8094707

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  • TDR measurement with utility-pole-interval resolution of real-scale distribution system Reviewed

    Oe S., Sasaoka T., Matsushima T., Hisakado T., Wada O.

    CIRED - Open Access Proceedings Journal   2017 ( 1 )   1504 - 1507   2017.10

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    DOI: 10.1049/oap-cired.2017.0195

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  • Equivalent circuit model with nonlinear characteristics of zener diode extracted from SPICE model for ESD simulation Reviewed

    Matsushima T., Aoki M., Hisakado T., Wada O.

    Proceedings of the 2017 11th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMCCompo 2017   152 - 155   2017.07

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    DOI: 10.1109/EMCCompo.2017.7998101

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  • Equivalent-circuit model for meta-atoms consisting of wired metallic spheres Reviewed

    HISAKADO Takashi, YOSHIDA Keisuke, MATSUSHIMA Tohlu, WADA Osami

    IEICE Transactions on Electronics ( The Institute of Electronics, Information and Communication Engineers )   E100C ( 3 )   305 - 312   2017.03

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    <p>An equivalent-circuit model is an effective tool for the analysis and design of metamaterials. This paper describes a systematic and theoretical method for the circuit modeling of meta-atoms. We focus on the structures of wired metallic spheres and propose a method for deriving a sophisticated equivalent circuit that has the same topology as the wires using the partial element equivalent circuit (PEEC) method. Our model contains the effect of external electromagnetic coupling: excitation by an external field modeled by voltage sources and radiation modeled by the radiation resistances for each mode. The equivalent-circuit model provides the characteristics of meta-atoms such as the resonant frequencies and the resonant modes induced by the current distribution in the wires by an external excitation. Although the model is obtained by a very coarse discretization, it provides a good agreement with an electromagnetic simulation.</p>

    DOI: 10.1587/transele.E100.C.305

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  • Packet Error Rate Analysis Considering Collision Probability between Pulse Disturbance and Transmission Packets Reviewed

    TAKAYA Kazuhiro, TOMITA Daisuke, UMEDA Kouki, OGAWA Masakatsu, MATSUSHIMA Tohlu, HISAKADO Takashi, WADA Osami

    J100-B ( 3 )   166 - 175   2017.03

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    According to the advent of Internet of Things (IoT) era and the 5th Generation concept, the network access control method, which is convenient for choosing appropriate communication system and communication parameters, has been required as to communication environment or network applications. For choosing the appropriate system and the parameters, it is important to estimate the communication quality, which depends on communication environment. Disturbance becomes one of the factors for determining the communication environment, and some methods have been proposed for estimating the communication quality for the communication environment with various disturbances, with applying such as Amplitude Probability Distribution (APD) or Signal to Interference Ratio (SIR), which are strongly correlated to communication quality deterioration of digital radio communication systems. However APD couldn't consider pulse duration or interval between each pulse disturbance although almost all the artificial disturbance may be the pulse disturbance. Additionally, SIR couldn't show its efficiency when we estimate the communication quality in the communication environment where a number of disturbance sources exist and the power of each pulse disturbance is different. This paper proposes Packet Error Rare (PER) analysis method that takes the collision probability between pulse disturbance and transmission packets in the communication environment with various pulse disturbances whose pulse duration, interval between each pulse disturbance, and power are different. Furthermore, parameters of the disturbance for estimating PER are considered with using case study.

    DOI: 10.14923/transcomj.2016pep0008

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  • Experimental evaluation of communication quality of Ethernet in relation to parameters of pulse disturbances Reviewed

    Matsushima Sayaka, Matsushima Tohlu, Hisakado Takashi, Wada Osami

    IEICE Communications Express ( The Institute of Electronics, Information and Communication Engineers )   6 ( 12 )   639 - 644   2017.01

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    <p>In this paper, in order to improve the reliability of Ethernet communication, the effect of pulse disturbances on the communication quality of 100BASE-TX was evaluated experimentally. A relationship between the threshold level of Ethernet and disturbances affecting communication quality was revealed when the amplitude and width of the pulse disturbance were changed. A disturbance in which the pulse width was the same as 1 bit time of the signal degraded the communication quality the most. These findings should help in the effort to apply Ethernet to automotive area network.</p>

    DOI: 10.1587/comex.2017XBL0116

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  • Position of Parasitic Capacitance around DCDC Converter for Reduction of Common-mode Current Reviewed

    Proceedings of JIEP Annual Meeting ( The Japan Institute of Electronics Packaging )   31 ( 0 )   320 - 321   2017.01

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    DOI: 10.11486/ejisso.31.0_320

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  • Time domain model for reaction of radiation on thin cut wires Reviewed

    Kimura T., Hisakado T., Matsushima T., Wada O.

    2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2016   181 - 183   2016.11

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    DOI: 10.1109/MetaMaterials.2016.7746480

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  • Immunity macro model for linear regulator considering internal terminal voltage Reviewed

    Matsushima T., Miyahara H., Hisakado T., Wada O.

    IEEE International Symposium on Electromagnetic Compatibility   2016-November   532 - 535   2016.11

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    DOI: 10.1109/EMCEurope.2016.7739228

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  • B-4-71 LCL Evaluation Based on S-parameter Measurements

    Matsushima Tohlu, Takaya Kazuhio, Okugawa Yuichiro, Sugiura Akira, Wada Osami

    Proceedings of the IEICE General Conference ( The Institute of Electronics, Information and Communication Engineers )   2016 ( 1 )   391   2016.03

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  • C-1-7 Theoretical expression of external excitation on single conductor line Reviewed

    Kimura Takuya, Hisakado Takashi, Matsushima Tohlu, Wada Osami

    Proceedings of the IEICE General Conference ( The Institute of Electronics, Information and Communication Engineers )   2016 ( 1 )   7   2016.03

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  • C-2-28 Expression of Electromagnetic Coupling with Retardation in Lumped Element Circuit Model Reviewed

    Ohishi Katsuya, Hisakado Takashi, Matsushima Tohlu, Wada Osami

    Proceedings of the IEICE General Conference ( The Institute of Electronics, Information and Communication Engineers )   2016 ( 1 )   57   2016.03

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  • Immunity Macro Model of LDO Voltage Regulator by Measurement of Large Signal S Parameter Reviewed

    Proceedings of JIEP Annual Meeting ( The Japan Institute of Electronics Packaging )   30 ( 0 )   338 - 340   2016.01

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    DOI: 10.11486/ejisso.30.0_338

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  • Reduction method of common-mode noise on power supply cable using floating conductor Reviewed

    2015.12

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    DOI: 10.1109/APEMC.2013.7360608

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  • Relation between internal terminal voltage and immunity behavior of LDO regulator circuits Reviewed

    143 - 146   2015.12

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/EMCCompo.2015.7358346

    Scopus

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  • Mode conversion and transfer characteristics of conducted disturbance to Ethernet device from power supply cable Reviewed

    2015-Septmber   378 - 381   2015.09

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/ISEMC.2015.7256190

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  • Reduction method of common mode in high speed differential transmission line

    Matsushima T.

    Journal of Japan Institute of Electronics Packaging ( Journal of Japan Institute of Electronics Packaging )   18 ( 5 )   348 - 352   2015.01

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)

    DOI: 10.5104/jiep.18.348

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    Other Link: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84947065598&origin=inward

  • Impedance balance control for reduction of common mode noise in full bridge converter Reviewed

    695 - 699   2015.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/ICEP-IAAC.2015.7111100

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  • Power and ground phase relation in LSI power distribution network at common-mode noise reduction Reviewed

    2014-December   561 - 564   2014.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

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    Other Link: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84942571473&origin=inward

  • Imbalance control by open stub for reduction of common-mode conversion at differential transmission line bend Reviewed

    2014-December   125 - 128   2014.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

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  • Reduction of common-mode excitation on a differential transmission line bend by imbalance control Reviewed

    Matsushima Tohlu, Wada Osami

    IEICE Communications Express   3 ( 10 )   295 - 299   2014.01

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1587/comex.3.295

    CiNii Article

    Other Link: https://ci.nii.ac.jp/naid/130004698014

  • A method of common-mode reduction based on imbalance difference model for differential transmission line bend Reviewed

    338 - 341   2013.12

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  • Imbalance Control for Reduction of Common-Mode Generation at Differential Transmission Line Bend Reviewed

    MATSUSHIMA Tohlu, WADA Osami

    IEICE technical report. Electromagnetic compatibility ( The Institute of Electronics, Information and Communication Engineers )   113 ( 101 )   5 - 10   2013.06

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    Language:Japanese   Publishing type:Research paper (scientific journal)

    A differential transmission line bend generates a large common mode due to its asymmetry, and it leads signal integrity problems. In this paper, the imbalance difference model, which was proposed by the authors for estimation of common-mode radiation, is extended to apply to the differential signaling systems. An equivalent circuit model based on the imbalance difference model is proposed for estimation of the common-mode excitation at the transmission line bend. Simulation results of mode conversion from the differential mode to the common mode calculated by the proposed model are in good agreement with those using a three-dimensional electromagnetic solver. In order to reduce the common mode, a guard trace is added near the narrowed inner signal line at the line bend and it gives 15 dB of reduction of the common mode. In addition, an open stub which is connected inner signal line at the line bend can control the imbalance. More than 20 dB of reduction is obtained by the narrow signal line and the open stub.

    CiNii Article

    Other Link: https://ci.nii.ac.jp/naid/110009779032

  • Substrate noise reduction based on impedance balance using tunable resistances Reviewed

    33 - 36   2013.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/EMCCompo.2013.6735168

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  • Improvement of reproducibility of DPI method to quantify RF conducted immunity of LDO regulator Reviewed

    59 - 62   2013.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/EMCCompo.2013.6735173

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  • Impedance balance control for suppression of fluctuation on ground voltage in LSI package Reviewed

    134 - 137   2013.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/EMCCompo.2013.6735187

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  • Experimental verification of signal integrity deterioration due to package-common-mode resonance Reviewed

    2012.12

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/EMCEurope.2012.6396871

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  • Common-mode noise reduction using floating conductor in LSI package Reviewed

    105 - 108   2012.12

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/EDAPS.2012.6469405

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  • Verification of common-mode-current prediction method based on imbalance difference model for single-channel differential signaling system Reviewed

    409 - 412   2012.08

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/APEMC.2012.6237956

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  • Degradation of signal integrity due to package-common-mode resonance caused by external conductive noise in power supply system Reviewed

    85 - 88   2012.08

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/APEMC.2012.6237999

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  • SI/PI degradation due to package-common-mode resonance caused by parasitic capacitance between package and PCB Reviewed

    213 - 218   2011.12

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    Language:English   Publishing type:Research paper (international conference proceedings)

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  • Power supply current analysis of micro-controller with considering the program dependency Reviewed

    93 - 98   2011.12

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    Language:English   Publishing type:Research paper (international conference proceedings)

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  • Prediction of EMI from two-channel differential signaling system based on imbalance difference model Reviewed

    413 - 418   2010.12

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/ISEMC.2010.5711310

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  • Calculation of common-mode radiation from single-channel differential signaling system using imbalance difference model Reviewed

    E93-B ( 7 )   1739 - 1745   2010.01

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  • Suppression of guard-trace resonance by matched termination for reducing common-mode radiation Reviewed

    E93-B ( 7 )   1746 - 1753   2010.01

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  • Linear equivalent circuit and current sources model including separation resistances in the ground connection for multiple power-supply pin LSI Reviewed

    130 ( 11 )   2010.01

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1541/ieejeiss.130.1897

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▼display all

Industrial Property

  • 配電系統探査システム

    上嶋 宏明, 和田 修己, 久門 尚史, 佐々木 祐輔, 三田 慎一, 津田 直孝, 松嶋 徹

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    Application no:2019-141232  Date applied:2019.07.31

    Announcement no:2021-25787  Date announced:2021.02.22

  • 伝搬モード変換抑制回路およびその抑制方法

    奥村 雄一郎, 岡本 健, 高谷 和宏, 松嶋 徹, 和田 修己

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    Application no:2017-152579  Date applied:2017.08.07

    Announcement no:2019-33349  Date announced:2019.02.28

Honors and Awards

  • エレクトロニクス実装学会論文賞

    一般社団法人 エレクトロニクス実装学会   グラウンド端に近接した差動伝送路を対象とした平衡度不整合モデルに基づくコモンモード電流低減量予測法の検証   2019.05.23

    松嶋徹, 和田修己, 渡辺哲史, 豊田啓孝, 古賀隆治

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    Country:Japan

Award for Educational Activities

  • 2020年度電子情報通信学会九州支部学生会講演奨励賞

    電子情報通信学会九州支部   2021.01

  • 日本電磁環境測定協会賞受賞

    電子情報通信学会環境電磁工学専門委員会   2019.12.06