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Paper Abstract and Keywords
Presentation 2017-06-12 14:15
Characteristics of a Folded Spiral Antenna for coupled-resonant Wireless Power Transfer
Kohei Nimura, Hiroshi Hirayama (Nagoya Inst. of Tech.) WPT2017-11
Abstract (in Japanese) (See Japanese page) 
(in English) Coupled resonant wireless power transfer system has an advantage of high efficient mid-range power transmission where impedance matching should be achieved in order to realize maximum available efficiency. For impedance matching of real part, a matching circuit or an indirect power feeding with loop antenna have been used. However, a loss of matching circuit degrades transmission efficiency, and the loop antenna requires installation space.
It is known that a folded dipole antenna used in communication system has a capability of adjusting input impedance by varying radius of conductors or distance between elements. In this paper, folded spiral antenna, which is a self-resonant spiral antenna with a folded structure, is studied. Numerical simulation demonstrates that the folded spiral antenna realizes maximum available efficiency without using a matching circuit. We found that maximum available efficiency is improved by using folded structure. As a result, folded spiral antenna has two functions of impedance matching and improving maximum available efficiency.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless power transfer / Magnetic coupled resonant / Impedance matching / Maximum efficiency / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 85, WPT2017-11, pp. 17-22, June 2017.
Paper # WPT2017-11 
Date of Issue 2017-06-05 (WPT) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
Copyright
and
reproduction
技術研究報告に掲載された論文の著作権はIEICEに帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF WPT2017-11

Conference Information
Committee WPT  
Conference Date 2017-06-12 - 2017-06-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Kagoshima Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Power Transfer 
Paper Information
Registration To WPT 
Conference Code 2017-06-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Characteristics of a Folded Spiral Antenna for coupled-resonant Wireless Power Transfer 
Sub Title (in English)  
Keyword(1) Wireless power transfer  
Keyword(2) Magnetic coupled resonant  
Keyword(3) Impedance matching  
Keyword(4) Maximum efficiency  
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1st Author's Name Kohei Nimura  
1st Author's Affiliation Nagoya Institute of Technology (Nagoya Inst. of Tech.)
2nd Author's Name Hiroshi Hirayama  
2nd Author's Affiliation Nagoya Institute of Technology (Nagoya Inst. of Tech.)
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Speaker
Date Time 2017-06-12 14:15:00 
Presentation Time 25 
Registration for WPT 
Paper # IEICE-WPT2017-11 
Volume (vol) IEICE-117 
Number (no) no.85 
Page pp.17-22 
#Pages IEICE-6 
Date of Issue IEICE-WPT-2017-06-05 


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