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Paper Abstract and Keywords
Presentation 2026-01-22 15:40
A Study on Electric Field Near Toroidal Core for Evaluating Electric Field Coupling Between Filter Components
Haruki Sasaki (Aoyama Gakuin Univ.), Kohei Hasegawa (Aoyama Gakuin Univ./Toshiba Corp.), Ryosuke Suga (Aoyama Gakuin Univ.) EST2025-92
Abstract (in Japanese) (See Japanese page) 
(in English) The electric field near the toroidal core, which is one of the components of the filter was evaluated by measurements and electromagnetic field simulations. A higher electric field was measured near the toroidal core using a small dipole antenna compared to that measured with an air core. The simulation results revealed that the electric field distribution near the core varies with the relative permittivity and permeability of the core. It was clarified that at the self-resonant frequency, when the near-field electric field is expected to reach its maximum, the relative permittivity of the core influences it more than the relative permeability does.
Keyword (in Japanese) (See Japanese page) 
(in English) Toroidal core / choke coile / electric field / EMC / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 328, EST2025-92, pp. 59-63, Jan. 2026.
Paper # EST2025-92 
Date of Issue 2026-01-15 (EST) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
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)
Download PDF EST2025-92

Conference Information
Committee EST  
Conference Date 2026-01-22 - 2026-01-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Nobumoto Ohama Memorial Hal 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Simulation techniques, etc. 
Paper Information
Registration To EST 
Conference Code 2026-01-EST 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Electric Field Near Toroidal Core for Evaluating Electric Field Coupling Between Filter Components 
Sub Title (in English)  
Keyword(1) Toroidal core  
Keyword(2) choke coile  
Keyword(3) electric field  
Keyword(4) EMC  
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1st Author's Name Haruki Sasaki  
1st Author's Affiliation Aoyama Gakuin University (Aoyama Gakuin Univ.)
2nd Author's Name Kohei Hasegawa  
2nd Author's Affiliation Aoyama Gakuin University/Toshiba Corporation (Aoyama Gakuin Univ./Toshiba Corp.)
3rd Author's Name Ryosuke Suga  
3rd Author's Affiliation Aoyama Gakuin University (Aoyama Gakuin Univ.)
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Speaker Author-1 
Date Time 2026-01-22 15:40:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # EST2025-92 
Volume (vol) vol.125 
Number (no) no.328 
Page pp.59-63 
#Pages 5 
Date of Issue 2026-01-15 (EST) 

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