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Paper Abstract and Keywords
Presentation 2013-07-11 14:00
A Study on Transformed Common-mode from Differential-mode for Differential Transmission Line with components
Ayumi Mothashi, Fujiyuki Nakamoto, Yuichi Sasaki, Naoto Oka, Hideyuki Oh-hashi (Mitsubishi Electric Corp.) EMCJ2013-33
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, the high-speed differential interface such as Ethernet is widely used as a line-structure with low radiated noise and high noise immunity. Though high structural balance is usually required to improve these performances, degradation of the balance may often occur from asymmetry of the structure. In that case, some of differential-mode signal is transformed to common-mode, which may often causes increase of radiated noise from the differential transmission line. It is therefore important to reduce the ratio of transformed common-mode to differential-mode (Scd21) in the design stage to suppress the radiated noise. In this paper, the capacitance model is used for modeling of components. In calculation, Scd21 can be expressed as difference between capacities connected with each differential transmission line. Calculation and measurement results of Scd21 are shown. The results showed good agreement, and would be applicable in EMC design of differential transmission lines.
Keyword (in Japanese) (See Japanese page) 
(in English) EMC / EMI / PCB / differential transmission line / mode transformation / radiated noise suppression / mixed mode S-parameters / capacitance model  
Reference Info. IEICE Tech. Rep., vol. 113, no. 122, EMCJ2013-33, pp. 33-37, July 2013.
Paper # EMCJ2013-33 
Date of Issue 2013-07-04 (EMCJ) 
ISSN Print edition: ISSN 0913-5685    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 2013-07-11 - 2013-07-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Young Scientists meeting 
Paper Information
Registration To EMCJ 
Conference Code 2013-07-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Transformed Common-mode from Differential-mode for Differential Transmission Line with components 
Sub Title (in English)  
Keyword(1) EMC  
Keyword(2) EMI  
Keyword(3) PCB  
Keyword(4) differential transmission line  
Keyword(5) mode transformation  
Keyword(6) radiated noise suppression  
Keyword(7) mixed mode S-parameters  
Keyword(8) capacitance model  
1st Author's Name Ayumi Mothashi  
1st Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
2nd Author's Name Fujiyuki Nakamoto  
2nd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
3rd Author's Name Yuichi Sasaki  
3rd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
4th Author's Name Naoto Oka  
4th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
5th Author's Name Hideyuki Oh-hashi  
5th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric Corp.)
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Speaker Author-1 
Date Time 2013-07-11 14:00:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2013-33 
Volume (vol) vol.113 
Number (no) no.122 
Page pp.33-37 
#Pages 5 
Date of Issue 2013-07-04 (EMCJ) 

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