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Paper Abstract and Keywords
Presentation 2026-03-02 13:15
Transient electromagnetic field response of half-wavelength dipoles across a dielectric interface
Yuki Kikugawa, Hayato Shiraishi, Tamami Maruyama (Hiroshima Institute of Technology), Manabu Omiya (Hokkaido University) WPT2025-64
Abstract (in Japanese) (See Japanese page) 
(in English) The propagation velocity of electromagnetic waves in a medium with a high relative permittivity is commonly expressed as the speed of light divided by the square root of the relative permittivity. When a transmitting antenna is placed near the boundary between such a medium and air, reflections at the interface occur, and it becomes of interest to determine which propagation path allows the electromagnetic field to reach the receiving antenna first. However, in practical materials, this simple relation does not always hold; for example, in media such as water with strong frequency dispersion, or in ferroelectric crystals that are not isotropic. In this study, as a first step, a hypothetical ideal dielectric medium with a relative permittivity of 81, identical to that of water, is assumed, and half-wavelength dipole antennas are placed at the boundary between this medium and air. The transient electromagnetic field response is investigated using time-domain electromagnetic field analysis based on the finite-difference time-domain (FDTD) method.
Keyword (in Japanese) (See Japanese page) 
(in English) WPT / Wireless Power Transfer / Radiative WPT / Wireless Transmission in Dielectric Media / Underwater Wireless Power Transfer / Transient Response / FDTD Method /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 373, WPT2025-64, pp. 37-40, March 2026.
Paper # WPT2025-64 
Date of Issue 2026-02-23 (WPT) 
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 WPT2025-64

Conference Information
Committee WPT  
Conference Date 2026-03-02 - 2026-03-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. (Uji Campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) SSPS Technology, Wireless Power Transfer, etc 
Paper Information
Registration To WPT 
Conference Code 2026-03-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Transient electromagnetic field response of half-wavelength dipoles across a dielectric interface 
Sub Title (in English)  
Keyword(1) WPT  
Keyword(2) Wireless Power Transfer  
Keyword(3) Radiative WPT  
Keyword(4) Wireless Transmission in Dielectric Media  
Keyword(5) Underwater Wireless Power Transfer  
Keyword(6) Transient Response  
Keyword(7) FDTD Method  
Keyword(8)  
1st Author's Name Yuki Kikugawa  
1st Author's Affiliation Hiroshima Institute of Technology (Hiroshima Institute of Technology)
2nd Author's Name Hayato Shiraishi  
2nd Author's Affiliation Hiroshima Institute of Technology (Hiroshima Institute of Technology)
3rd Author's Name Tamami Maruyama  
3rd Author's Affiliation Hiroshima Institute of Technology (Hiroshima Institute of Technology)
4th Author's Name Manabu Omiya  
4th Author's Affiliation Hokkaido University (Hokkaido University)
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Speaker Author-1 
Date Time 2026-03-02 13:15:00 
Presentation Time 25 minutes 
Registration for WPT 
Paper # WPT2025-64 
Volume (vol) vol.125 
Number (no) no.373 
Page pp.37-40 
#Pages 4 
Date of Issue 2026-02-23 (WPT) 

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