Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2026-05-14 14:50
Visualization and Comparison of Transient Electromagnetic Wave Propagation Considering Conduction Loss in Freshwater and Seawater
Hayato Shiraishi, Hiroki Kikugawa, Tamami Maruyama (Hiroshima Institute of Technology), Manabu Omiya (Hokkaido University) MW2026-11
Abstract (in Japanese) (See Japanese page) 
(in English) n recent years, the demand for wireless transmission in underwater and marine environments has been increasing. However, water has a high relative permittivity of approximately 81, resulting in a theoretical wavelength that is about one-ninth of that in air. In addition, its electrical conductivity is 0.01 S/m for freshwater and 4 S/m for seawater, leading to significant propagation loss. In this study, transient electromagnetic wave propagation was analyzed using the finite-difference time-domain (FDTD) method. A model consisting of transmitting and receiving dipole antennas placed near the boundary between air and a lossy high-permittivity medium representing freshwater or seawater was considered, and the spatial distribution of electromagnetic fields was visualized. The results show that in freshwater, electromagnetic waves propagate radially with clear interference patterns, whereas in seawater, the waves rapidly attenuate near the source due to conduction loss, resulting in a significant collapse of the propagation structure. In particular, a transition from wave-like behavior to diffusion-like behavior was observed in seawater, and the localized absorption of electromagnetic energy was clearly demonstrated. Furthermore, the differences in propagation characteristics, including spatial spreading and attenuation behavior, between air and water were also clarified.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless Power Transfer (WPT) / Transient Response / FDTD Analysis / Underwater Wireless Power Transfer / Wireless Transmission in Dielectric Media, / Radiative WPT / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 24, MW2026-11, pp. 13-18, May 2026.
Paper # MW2026-11 
Date of Issue 2026-05-07 (MW) 
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 MW2026-11

Conference Information
Committee MW  
Conference Date 2026-05-14 - 2026-05-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Sannomiya convention center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, etc. 
Paper Information
Registration To MW 
Conference Code 2026-05-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Visualization and Comparison of Transient Electromagnetic Wave Propagation Considering Conduction Loss in Freshwater and Seawater 
Sub Title (in English)  
Keyword(1) Wireless Power Transfer (WPT)  
Keyword(2) Transient Response  
Keyword(3) FDTD Analysis  
Keyword(4) Underwater Wireless Power Transfer  
Keyword(5) Wireless Transmission in Dielectric Media,  
Keyword(6) Radiative WPT  
Keyword(7)  
Keyword(8)  
1st Author's Name Hayato Shiraishi  
1st Author's Affiliation Hiroshima Institute of Technology (Hiroshima Institute of Technology)
2nd Author's Name Hiroki Kikugawa  
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)
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2026-05-14 14:50:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2026-11 
Volume (vol) vol.126 
Number (no) no.24 
Page pp.13-18 
#Pages 6 
Date of Issue 2026-05-07 (MW) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan