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Paper Abstract and Keywords
Presentation 2017-12-10 04:00
Evanescent-wave Coupling for Highly Efficient Wireless Power Transfer
Daisuke Nakamichi, Hiroyasu Sato, Qiang Chen (Tohoku Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In order to enhance power transmission efficiency of a near field wireless power transfer (WPT) system, impedance matching between transmitting/receiving antennas should be kept as much as possible and its interference to the other electronic devices by leaked electromagnetic waves should be suppressed. However, in practice, it is difficult to keep the impedance matching between the transmitting and the receiving antennas because the impedance matching is quite sensitive to the position and profile of them. Impedance mismatching leads to poor power transmission efficiency and undesired power radiation that interferes the other electronic devices. In this paper, a novel near field WPT system with a parallel plate is proposed. The proposed WPT system works under the cutoff frequency of the parallel plate and resultant mode in the parallel plate is evanescent. The proposed WPT system has two advantages. The first one is the stable impedance matching which comes from phaseless nature of evanescent wave. The second one is the small radiation which results in small interference. Results of numerical simulation demonstrate the performance of the proposed system.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless power transfer / Impedance matching / Parallel plate / Evanescent wave / / / /  
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Conference Information
Committee WPT  
Conference Date 2017-12-09 - 2017-12-11 
Place (in Japanese) (See Japanese page) 
Place (in English) National University of Singapore(AWPT2017) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 2017 Asian Wireless Power Transfer Workshop (AWPT2017) 
Paper Information
Registration To WPT 
Conference Code 2017-12-WPT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evanescent-wave Coupling for Highly Efficient Wireless Power Transfer 
Sub Title (in English)  
Keyword(1) Wireless power transfer  
Keyword(2) Impedance matching  
Keyword(3) Parallel plate  
Keyword(4) Evanescent wave  
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1st Author's Name Daisuke Nakamichi  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Hiroyasu Sato  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Qiang Chen  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2017-12-10 04:00:00 
Presentation Time 25 minutes 
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