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Paper Abstract and Keywords
Presentation 2022-01-21 15:45
Simple Method of Determining Chain-Parameter-Matrix Elements for Multi-Conductor Shielded Cable
Nobuo Kuwabara, Tohlu Matsushima, Yuki Fukumoto (KIT) EMCJ2021-71
Abstract (in Japanese) (See Japanese page) 
(in English) Multiconductor shielded cables are used in vehicles and electronic devices to maintain EMC quality. A method using a chain-parameter matrix has been reported as the analysis method of a multiconductor transmission line for the radiated emission from the cable and the interference from the electromagnetic environment. In this method, the per-unit-length impedance matrix and admittance matrix of the cable is required to determine the elements of the chain-parameter matrix, and, in many cases, these are obtained using an analysis tool that uses the finite element method or the like. However, it is generally difficult to obtain the chain-parameter matrix elements by the analysis because the cable shield and the cable conductors are constructed by bundling thin wires and the dielectric constant and loss tangent of the insulator material is not published in the EMC investigation frequency. In addition, although the chain-parameter matrix elements can be obtained by measurement, it is difficult to measure them with high accuracy because a very short sample is required. In this report, a method of determining the per-unit-length impedance matrix and the admittance matrix is proposed for obtaining the chain-parameter matrix elements. The method uses the line constants of the common-mode transmission line, the line constants of the differential-mode transmission line for one pair, and the analysis result not considering the dielectric materials. As a result of applying this method to a shielded cable with one pair, it was found that the line constants of differential-mode and common-mode transmission lines obtained from the matrix elements were agreed with the measured value.
Keyword (in Japanese) (See Japanese page) 
(in English) STP cable / Multiconductor cable / Chain-parameter matrix / Line constants / Common-mode / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 339, EMCJ2021-71, pp. 57-62, Jan. 2022.
Paper # EMCJ2021-71 
Date of Issue 2022-01-14 (EMCJ) 
ISSN Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EMCJ  
Conference Date 2022-01-21 - 2022-01-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMCJ 
Conference Code 2022-01-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Simple Method of Determining Chain-Parameter-Matrix Elements for Multi-Conductor Shielded Cable 
Sub Title (in English)  
Keyword(1) STP cable  
Keyword(2) Multiconductor cable  
Keyword(3) Chain-parameter matrix  
Keyword(4) Line constants  
Keyword(5) Common-mode  
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1st Author's Name Nobuo Kuwabara  
1st Author's Affiliation Kyushu Institute of Technology (KIT)
2nd Author's Name Tohlu Matsushima  
2nd Author's Affiliation Kyushu Institute of Technology (KIT)
3rd Author's Name Yuki Fukumoto  
3rd Author's Affiliation Kyushu Institute of Technology (KIT)
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Speaker Author-1 
Date Time 2022-01-21 15:45:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2021-71 
Volume (vol) vol.121 
Number (no) no.339 
Page pp.57-62 
#Pages
Date of Issue 2022-01-14 (EMCJ) 


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