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Paper Abstract and Keywords
Presentation 2019-10-09 11:25
Open-Ring Resonator Coupling for 920 MHz-Band Wireless Power Transmission System
Yasuo Ohno, Hiroko Itoh (Laser Systems) WPT2019-28
Abstract (in Japanese) (See Japanese page) 
(in English) Microwave resonant power transmission using open-ring resonators is reported. The open-ring resonator is a ring-shaped λ / 2 resonator made by planar circuit technology. By overlapping the two resonators with opposite direction, a strong coupling is obtained by combining electric and magnetic field couplings. The principle can be applied from MHz band to millimeter waves regardless of the frequency. We made rings for 920MHz band to transmit power to drones, AGVs and EVs where cm-order transmissions are required. The rings were made of aluminum plate with a diameter of about 75 mm. Transmission efficiency of 93.5% was obtained at a distance of 40 mm between the rings.
Keyword (in Japanese) (See Japanese page) 
(in English) microwave / resonant power transmission / open-ring resonator, / wireless power transmission / external Q / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 218, WPT2019-28, pp. 7-12, Oct. 2019.
Paper # WPT2019-28 
Date of Issue 2019-10-02 (WPT) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 WPT2019-28

Conference Information
Committee WPT EE  
Conference Date 2019-10-09 - 2019-10-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Ryukoku Extension Center, Ryukoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WPT 
Conference Code 2019-10-WPT-EE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Open-Ring Resonator Coupling for 920 MHz-Band Wireless Power Transmission System 
Sub Title (in English)  
Keyword(1) microwave  
Keyword(2) resonant power transmission  
Keyword(3) open-ring resonator,  
Keyword(4) wireless power transmission  
Keyword(5) external Q  
1st Author's Name Yasuo Ohno  
1st Author's Affiliation Laser Systems Inc. (Laser Systems)
2nd Author's Name Hiroko Itoh  
2nd Author's Affiliation Laser Systems Inc. (Laser Systems)
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Date Time 2019-10-09 11:25:00 
Presentation Time 20 
Registration for WPT 
Paper # IEICE-WPT2019-28 
Volume (vol) IEICE-119 
Number (no) no.218 
Page pp.7-12 
#Pages IEICE-6 
Date of Issue IEICE-WPT-2019-10-02 

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