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Paper Abstract and Keywords
Presentation 2017-03-07 13:50
Analysis of the Output Voltage Wave of the Rectifier with Intermittent Input
Takashi Hirakawa, Naoki Shinohara (Kyoto Univ.) WPT2016-80
Abstract (in Japanese) (See Japanese page) 
(in English) Nowadays, Wireless power transfer (WPT) is attracting our interest. Using WPT, we can charge our terminals in spite of its position and wires are needless for charging. This is effective for reducing batteries. How- ever, as shortages, WPT has lower RF–DC conversion efficiency than that of wired charging and interference with communication systems. Intermittent wave has high peak-to-average power ratio. Previous studies show that this kind of wave form is effective for boosting RF–DC conversion efficiency. In addition, intermittent wave is effective for avoiding the interference. In this study, we analyzed the output voltage form of rectifiers with intermittent input. First, we simulated the output voltage of rectifier with intermittent input by using the transient method. From the analysis of this wave form, we hypothesis that the output voltage can be expressed by time constants. In this assumption, output voltage wave can be regarded as exponential functions. In this approximation, we can calculate the time constants. Output voltage wave is expressed by these time constants. We calculated the RF–DC conversion efficiency and ripple content by estimated output voltage. Finally, we compared the experimental results and calculation results.
Keyword (in Japanese) (See Japanese page) 
(in English) Microwave / Rectifier / Intermittent wave / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 499, WPT2016-80, pp. 81-85, March 2017.
Paper # WPT2016-80 
Date of Issue 2017-02-27 (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)
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Conference Information
Committee WPT  
Conference Date 2017-03-06 - 2017-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. Uji Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Power Transfer, SPS Technology, etc. 
Paper Information
Registration To WPT 
Conference Code 2017-03-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of the Output Voltage Wave of the Rectifier with Intermittent Input 
Sub Title (in English)  
Keyword(1) Microwave  
Keyword(2) Rectifier  
Keyword(3) Intermittent wave  
1st Author's Name Takashi Hirakawa  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Naoki Shinohara  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2017-03-07 13:50:00 
Presentation Time 25 minutes 
Registration for WPT 
Paper # WPT2016-80 
Volume (vol) vol.116 
Number (no) no.499 
Page pp.81-85 
Date of Issue 2017-02-27 (WPT) 

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