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Paper Abstract and Keywords
Presentation 2025-11-07 10:20
Co-Analysis of Mode Conversion Caused by Pigtail Termination Imbalance in Four-Conductor Transmission Systems
Md Zahidul Islam, Masahiro Yoshida, Kazuto Kohno, Yoshitaka Toyota (Okayama Univ.) EMCJ2025-74
Abstract (in Japanese) (See Japanese page) 
(in English) Imbalance difference is the key parameter to causes mode conversion on the transmission line. For investigating mode conversion in four-conductor systems, a co-analysis approach integrating a secondary common-mode three-dimensional full-wave model design and a modal-equivalent circuit has been developed. This approach extends the conventional modal-equivalent-circuit method by coupling the imbalance difference and current division factors extracted from HFSS. The co-analysis enables direct evaluation of mode conversion caused by pigtail termination imbalance in shielded twisted-pair (STP) cables. Mixed-mode S-parameters corresponding to normal mode, primary-common mode, and secondary-common mode are analysed under both balanced and unbalanced conditions. As a result, the proposed method clarifies that mode conversion strongly depends on termination imbalance, and it effectively reproduces the electromagnetic behaviour of pigtail-terminated STP systems.
Keyword (in Japanese) (See Japanese page) 
(in English) four-conductor transmission systems / Co-analysis / Mode conversion sources / Pigtail termination / Current division factor / Mixed-mode S-parameters / Imbalance difference /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 230, EMCJ2025-74, pp. 22-27, Nov. 2025.
Paper # EMCJ2025-74 
Date of Issue 2025-10-31 (EMCJ) 
ISSN Online edition: ISSN 2432-6380
Copyright
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reproduction		 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 2025-11-07 - 2025-11-07 
Place (in Japanese) (See Japanese page) 
Place (in English) QUATEST3 (Ho Chi Minh, Vietnam) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC Joint Workshop 2025, Ho Chi Minh 
Paper Information
Registration To EMCJ 
Conference Code 2025-11-EMCJ 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Co-Analysis of Mode Conversion Caused by Pigtail Termination Imbalance in Four-Conductor Transmission Systems 
Sub Title (in English)  
Keyword(1) four-conductor transmission systems  
Keyword(2) Co-analysis  
Keyword(3) Mode conversion sources  
Keyword(4) Pigtail termination  
Keyword(5) Current division factor  
Keyword(6) Mixed-mode S-parameters  
Keyword(7) Imbalance difference  
Keyword(8)  
1st Author's Name Md Zahidul Islam  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Masahiro Yoshida  
2nd Author's Affiliation Okayama University (Okayama Univ.)
3rd Author's Name Kazuto Kohno  
3rd Author's Affiliation Okayama University (Okayama Univ.)
4th Author's Name Yoshitaka Toyota  
4th Author's Affiliation Okayama University (Okayama Univ.)
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Speaker Author-1 
Date Time 2025-11-07 10:20:00 
Presentation Time 60 minutes 
Registration for EMCJ 
Paper # EMCJ2025-74 
Volume (vol) vol.125 
Number (no) no.230 
Page pp.22-27 
#Pages 6 
Date of Issue 2025-10-31 (EMCJ) 

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