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Paper Abstract and Keywords
Presentation 2022-12-09 13:55
[Invited Talk] Development of Wireless Power Transmit System Enesphere
Yuki Tanaka (PSNRD), Hikaru Hamase, Takuma Ikeda, Manabu Gokan, Hiroyuki Tani (Panasonic), Hiroshi Sato, Yoshio Koyanagi (PSNRD) WPT2022-25
Abstract (in Japanese) (See Japanese page) 
(in English) The wireless power transmission technology using microwave frequency is attractive for rapidly spreading IoT devices such as the tracker, the beacon, and the sensor. In March 2022, the microwave WPT have institutionalized in Radio Act in Japan, and it can be used legally under some regulations. This lecture includes an overview, elemental techniques, and the applications of the microwave WPT system Enesphere. The Enesphere is consisted of a transmitter transmitting 1W 920MHz microwave and power receiver terminals powered by wireless power. The Radio Act regulates the transmitting power; hence hard to antenna directivity control such as beamforming. Therefore, the received power at the receiving terminal is quite small. The receiving terminal includes the high-efficiency small antenna, or diversity configuration and power reflect circuit that re-radiates surplus energy into space. In the 920MHz band, the multi-pass fading effect and coupling between receiving antennas are strong; hence the above antenna techniques are important. In the rectifier circuit, the fast MPPT (Maximum Power Point Tracking) enables efficient power conversion while varied input power and the rechargeable battery can be charged from surplus energy. In addition, a developing technology using multiple transmit antenna can transmit higher power safely is also mentioned.
Keyword (in Japanese) (See Japanese page) 
(in English) Far-field WPT / Small Antenna / Rectifier / Ultra Low Power Circuit / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 302, WPT2022-25, pp. 9-9, Dec. 2022.
Paper # WPT2022-25 
Date of Issue 2022-12-02 (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 WPT2022-25

Conference Information
Committee WPT  
Conference Date 2022-12-09 - 2022-12-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WPT 
Conference Code 2022-12-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of Wireless Power Transmit System Enesphere 
Sub Title (in English)  
Keyword(1) Far-field WPT  
Keyword(2) Small Antenna  
Keyword(3) Rectifier  
Keyword(4) Ultra Low Power Circuit  
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Keyword(6)  
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1st Author's Name Yuki Tanaka  
1st Author's Affiliation Panasonic System Networks R&D (PSNRD)
2nd Author's Name Hikaru Hamase  
2nd Author's Affiliation Panasonic Connect (Panasonic)
3rd Author's Name Takuma Ikeda  
3rd Author's Affiliation Panasonic Holdings (Panasonic)
4th Author's Name Manabu Gokan  
4th Author's Affiliation Panasonic Holdings (Panasonic)
5th Author's Name Hiroyuki Tani  
5th Author's Affiliation Panasonic Holdings (Panasonic)
6th Author's Name Hiroshi Sato  
6th Author's Affiliation Panasonic System Networks R&D (PSNRD)
7th Author's Name Yoshio Koyanagi  
7th Author's Affiliation Panasonic System Networks R&D (PSNRD)
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Speaker Author-1 
Date Time 2022-12-09 13:55:00 
Presentation Time 45 minutes 
Registration for WPT 
Paper # WPT2022-25 
Volume (vol) vol.122 
Number (no) no.302 
Page p.9 
#Pages 1 
Date of Issue 2022-12-02 (WPT) 

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