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Paper Abstract and Keywords
Presentation 2026-03-03 13:25
Study on a Low-Loss Small-Size 360-deg. Phase Shifter for 5.8-GHz Wireless Power Transfer
Tomoki Yoshida, Naoki Shinohara, Tomohiko Mitani (Kyoto Univ.), Bo Yang (Xidian Univ.) WPT2025-80
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a half-wavelength single-stage
5.8 GHz reflective-type phase shifter for wireless power transfer.
By using an appropriate permittivity substrate, the design achieves the phase range of over
360° in a single stage,
eliminating the second coupler required in conventional
designs.
Measurement results showed a phase range of 427.7°
and 3.3 dB insertion loss.
Simulations indicated an insertion loss of 1.4 dB. The discrepancy between
simulations and measurements is caused by parasitic capacitance from soldering.
Consequently, less parasitic structure was investigated to
reduce manufacturing variations, though further optimization is planned.
Keyword (in Japanese) (See Japanese page) 
(in English) phase shifter / reflective-type / hybrid coupler / varactor diode / wireless power transfer / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 373, WPT2025-80, pp. 119-124, March 2026.
Paper # WPT2025-80 
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 WPT2025-80

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) Study on a Low-Loss Small-Size 360-deg. Phase Shifter for 5.8-GHz Wireless Power Transfer 
Sub Title (in English)  
Keyword(1) phase shifter  
Keyword(2) reflective-type  
Keyword(3) hybrid coupler  
Keyword(4) varactor diode  
Keyword(5) wireless power transfer  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Tomoki Yoshida  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Naoki Shinohara  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Tomohiko Mitani  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Bo Yang  
4th Author's Affiliation Xidian University (Xidian Univ.)
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Speaker Author-1 
Date Time 2026-03-03 13:25:00 
Presentation Time 25 minutes 
Registration for WPT 
Paper # WPT2025-80 
Volume (vol) vol.125 
Number (no) no.373 
Page pp.119-124 
#Pages 6 
Date of Issue 2026-02-23 (WPT) 

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