| Presentation | 2017-06-12 Characteristics of a Folded Spiral Antenna for coupled-resonant Wireless Power Transfer Kohei Nimura, Hiroshi Hirayama, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Wireless power transfer / Magnetic coupled resonant / Impedance matching / Maximum efficiency |
| Paper # | WPT2017-11 |
| Date of Issue | 2017-06-05 (WPT) |
| Conference Information | |
| Committee | WPT |
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| Conference Date | 2017/6/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kagoshima Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Power Transfer |
| Chair | Chenq Kiyou(Tohoku Univ.) |
| Vice Chair | Tomohiro Seki(Nihon Univ.) |
| Secretary | Tomohiro Seki(Nagoya Inst. of Tech.) |
| Assistant | Takehiro Imura(Univ. of Tokyo) / Masahiro Hanazawa(UL Japan) |
| Paper Information | |
| Registration To | Technical Committee on Wireless Power Transfer |
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| Language | JPN |
| 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 |
| 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.) |
| Date | 2017-06-12 |
| Paper # | WPT2017-11 |
| Volume (vol) | vol.117 |
| Number (no) | WPT-85 |
| Page | pp.pp.17-22(WPT), |
| #Pages | 6 |
| Date of Issue | 2017-06-05 (WPT) |