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Paper Abstract and Keywords
Presentation 2021-11-18 15:25
Development of 1mW Class Rectenna for 920-MHz Band Wireless Power Transfer System
Katsumi Kawai, Naoki Shinohara, Tomohiko Mitani (Kyoto Univ.) MW2021-71
Abstract (in Japanese) (See Japanese page) 
(in English) The time and effort required to replace and recharge the batteries of wearable devices has become a problem in medical and welfare fields. To solve the problem of power supply for wearable devices, a wireless power transfer (WPT) system in the 920-MHz band has been proposed. To realize this WPT system, a highly efficient and low-power rectenna is required. The purpose of this study is to develop a high efficiency and low power rectenna in the 920-MHz band. As a first step, we developed a 1 mW class 920-MHz band charge pump rectifier circuit. We designed the rectifier circuit to achieve an output DC voltage of 3.0 V at an input power of 0 dBm. As a result of measurement experiments, a rectifier efficiency of 62.3 % and an output voltage of 2.85 V were obtained at an input power of -0.42 dBm.
Keyword (in Japanese) (See Japanese page) 
(in English) Charge-pump rectifier circuit / Source-pull simulation / 920-MHz band wireless power transfer / Wearable Device / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 254, MW2021-71, pp. 24-28, Nov. 2021.
Paper # MW2021-71 
Date of Issue 2021-11-11 (MW) 
ISSN 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)
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Conference Information
Committee MW  
Conference Date 2021-11-18 - 2021-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Kagoshima University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave 
Paper Information
Registration To MW 
Conference Code 2021-11-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of 1mW Class Rectenna for 920-MHz Band Wireless Power Transfer System 
Sub Title (in English)  
Keyword(1) Charge-pump rectifier circuit  
Keyword(2) Source-pull simulation  
Keyword(3) 920-MHz band wireless power transfer  
Keyword(4) Wearable Device  
1st Author's Name Katsumi Kawai  
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.)
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Speaker Author-1 
Date Time 2021-11-18 15:25:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2021-71 
Volume (vol) vol.121 
Number (no) no.254 
Page pp.24-28 
Date of Issue 2021-11-11 (MW) 

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