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Paper Abstract and Keywords
Presentation 2021-11-12 15:20
Investigation of measurement systems for designing RF-DC conversion circuits with maximum conversion efficiency at specific power and load
Kensuke Kobayashi, Kazuhiro Fujimori (Okayama Univ.) WPT2021-9
Abstract (in Japanese) (See Japanese page) 
(in English) In space solar power systems, the rectenna is used as an array on the power receiving side, but the microwave power density is not uniform on the surface of the rectenna array. Therefore, the RF-DC conversion circuit used for the rectenna needs to be optimally designed according to the input power, but the previous reports have examined the maximum efficiency of the RF-DC conversion circuit. This time, we constructed a measurement system that can measure the optimum circuit of the RF-DC conversion circuit. From this measurement system, the optimum microwave circuit when the input power and load resistance value are fixed can be experimentally found. In addition, as a result of measuring the impedance of the diode and the microwave circuit at 2.45 GHz using this measurement system, it was found that both impedances have a relationship close to the complex conjugate. Furthermore, by adjusting the input circuit to be complex conjugate with respect to the diode impedance and measuring it multiple times, it was found that the diode impedance changes and both impedances do not become complex conjugate. From these results, we show a method that can experimentally determine the optimum microwave circuit from the constructed measurement system and design an RF-DC conversion circuit.
Keyword (in Japanese) (See Japanese page) 
(in English) Rectenna / RF-DC Conversion Circuit / SSPS / / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 245, WPT2021-9, pp. 1-5, Nov. 2021.
Paper # WPT2021-9 
Date of Issue 2021-11-05 (WPT) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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 WPT UWT  
Conference Date 2021-11-12 - 2021-11-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WPT 
Conference Code 2021-11-WPT-UWT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation of measurement systems for designing RF-DC conversion circuits with maximum conversion efficiency at specific power and load 
Sub Title (in English)  
Keyword(1) Rectenna  
Keyword(2) RF-DC Conversion Circuit  
Keyword(3) SSPS  
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1st Author's Name Kensuke Kobayashi  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Kazuhiro Fujimori  
2nd Author's Affiliation Okayama University (Okayama Univ.)
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Speaker Author-1 
Date Time 2021-11-12 15:20:00 
Presentation Time 25 minutes 
Registration for WPT 
Paper # WPT2021-9 
Volume (vol) vol.121 
Number (no) no.245 
Page pp.1-5 
#Pages
Date of Issue 2021-11-05 (WPT) 


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