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Paper Abstract and Keywords
Presentation 2026-03-02 16:05
Study on High-Efficiency Beamforming in the Radiating Near-Field Considering Receiving Rectenna Shapes
Yuki Kagata, Tomohiko Mitani, Naoki Shinohara (Kyoto Univ.) WPT2025-70
Abstract (in Japanese) (See Japanese page) 
(in English) In radiating near-field microwave wireless power transfer, a conventional focusing beam can achieve high beam-collection efficiency, whereas its power-density distribution becomes highly non-uniform.
Such non-uniformity can potentially degrade the overall end-to-end transfer efficiency when rectification characteristics are taken into account.
To address this issue, this study improves the uniformity by forming a flat-topped beam synthesized using a multibeam approach.
Simulation and experimental results show that the RF-RF-DC transfer efficiency is 49.5% for the focusing beam and 50.3% for the rectangular flat-topped beam, indicating a slight improvement due to the more uniform power-density distribution of the flat-topped beam.
Keyword (in Japanese) (See Japanese page) 
(in English) wireless power transmission / flat-topped beam / beam synthesis method / phased array / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 373, WPT2025-70, pp. 68-73, March 2026.
Paper # WPT2025-70 
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 WPT2025-70

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 High-Efficiency Beamforming in the Radiating Near-Field Considering Receiving Rectenna Shapes 
Sub Title (in English)  
Keyword(1) wireless power transmission  
Keyword(2) flat-topped beam  
Keyword(3) beam synthesis method  
Keyword(4) phased array  
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Keyword(6)  
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1st Author's Name Yuki Kagata  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Tomohiko Mitani  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Naoki Shinohara  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2026-03-02 16:05:00 
Presentation Time 25 minutes 
Registration for WPT 
Paper # WPT2025-70 
Volume (vol) vol.125 
Number (no) no.373 
Page pp.68-73 
#Pages 6 
Date of Issue 2026-02-23 (WPT) 

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