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 2026-04-09 13:45
[Invited Lecture] Circuit Modeling of Directly Fed Self-Resonating Coils Using Impedance Expansion Method
Torao Okumoto, Nozomi Haga (Toyohashi Tech) AP2026-4
Abstract (in Japanese) (See Japanese page) 
(in English) The impedance expansion method (IEM) is a circuit modeling technique for electrically very small devices based on the method of moments, and has been applied to indirectly fed wireless power transfer systems. However, when applying the IEM to directly fed self-resonant coils, the slope of the current distribution is discontinuous at the feeding point, which requires a large number of modal currents to approximate the currents of the coils in the conventional eigenmode analysis. Therefore, this paper proposes a method for efficiently approximating the current distribution of directly fed coils and performing their circuit modeling by introducing new modal currents that are zero at the feeding point.
Keyword (in Japanese) (See Japanese page) 
(in English) Method of Moments / Impedance Expansion Method / Wireless Power Transfer / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 1, AP2026-4, pp. 15-19, April 2026.
Paper # AP2026-4 
Date of Issue 2026-04-02 (AP) 
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 AP2026-4

Conference Information
Committee AP  
Conference Date 2026-04-09 - 2026-04-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka University Nakanoshima Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation, Electoro-magnetic simulation 
Paper Information
Registration To AP 
Conference Code 2026-04-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Circuit Modeling of Directly Fed Self-Resonating Coils Using Impedance Expansion Method 
Sub Title (in English)  
Keyword(1) Method of Moments  
Keyword(2) Impedance Expansion Method  
Keyword(3) Wireless Power Transfer  
Keyword(4)  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Torao Okumoto  
1st Author's Affiliation Toyohashi University of Technology (Toyohashi Tech)
2nd Author's Name Nozomi Haga  
2nd Author's Affiliation Toyohashi University of Technology (Toyohashi Tech)
3rd Author's Name  
3rd Author's Affiliation ()
4th Author's Name  
4th Author's Affiliation ()
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 2026-04-09 13:45:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2026-4 
Volume (vol) vol.126 
Number (no) no.1 
Page pp.15-19 
#Pages 5 
Date of Issue 2026-04-02 (AP) 

[Return to Top Page]

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