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Paper Abstract and Keywords
Presentation 2026-01-22 10:55
Evaluation of Induced Electric Fields in the Human Body under Electromagnetic Exposure with Phase Differences
Teruya Kato, Masane Wakahara, Eikei Yamada, Sachiko Kodera, Akimasa Hirata (NITech) EST2025-84
Abstract (in Japanese) (See Japanese page) 
(in English) In the low-frequency range, electromagnetic fields exhibit quasi-static behavior, however, sources containing reactance components, such as coils or resonant circuits, can generate phase differences due to circuit impedance and electromagnetic coupling. Consequently, both the external magnetic field and induced electric field are characterized by complex amplitudes, and their accurate spatial evaluation requires complex-valued electromagnetic field computations. However, systematic investigations on human interaction with complex low-frequency fields remain insufficient. This study proposes a novel computational approach that provides a simplified alternative to full complex-field analysis and examines its effectiveness. First, the induced electric field is computed from the real component of the external magnetic field using an impedance method, and its validity is confirmed by comparison with theoretical solutions and the scalar-potential finite-difference (SPFD) method. The impedance method is then extended to directly calculate complex external magnetic fields and induced electric field. Furthermore, an induced electric field is calculated from a real magnetic field that is consistent with complex-field behavior, and a complex electric field is reconstructed by applying an amplitude scaling factor. The effectiveness of this simplified reconstruction is evaluated by comparison with results obtained from direct complex-field calculations.
Keyword (in Japanese) (See Japanese page) 
(in English) Impedance method / SPFD method / Electromagnetic field computation / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 328, EST2025-84, pp. 13-18, Jan. 2026.
Paper # EST2025-84 
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 EST2025-84

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) Evaluation of Induced Electric Fields in the Human Body under Electromagnetic Exposure with Phase Differences 
Sub Title (in English)  
Keyword(1) Impedance method  
Keyword(2) SPFD method  
Keyword(3) Electromagnetic field computation  
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1st Author's Name Teruya Kato  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Masane Wakahara  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name Eikei Yamada  
3rd Author's Affiliation Nagoya Institute of Technology (NITech)
4th Author's Name Sachiko Kodera  
4th Author's Affiliation Nagoya Institute of Technology (NITech)
5th Author's Name Akimasa Hirata  
5th Author's Affiliation Nagoya Institute of Technology (NITech)
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Speaker Author-1 
Date Time 2026-01-22 10:55:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # EST2025-84 
Volume (vol) vol.125 
Number (no) no.328 
Page pp.13-18 
#Pages 6 
Date of Issue 2026-01-15 (EST) 

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