| Presentation | 2019-01-17 [Tutorial Lecture] Quality factor of electrically small antennas and their broadbanding Keisuke Noguchi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Electrically small antennas which size is smaller than wavelength of the operating frequency are described with respect to lower limitation $Q$ factor, gain and bandwidth. Quality factors of typical small antennas such as inverted-L and normal mode helical antennas are evaluated with relation to the lower limitation $Q$. As an evaluation of electrically small antennas, product of bandwidth and radiation efficiency reported by Sievenpiper's group is introduced. Multi-mode excitation as a broadbanding method of small antenna is explained with design examples. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | small antenna / bandwidth enhancement / equivalent circuit / maximum bandwidth / multi-mode / planar antenna / Q factor |
| Paper # | AP2018-157,WPT2018-57 |
| Date of Issue | 2019-01-10 (AP, WPT) |
| Conference Information | |
| Committee | WPT / AP |
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| Conference Date | 2019/1/17(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Toyota Automobile Museum |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless transmission technology, Radio propagation, Antennas and Propagation |
| Chair | Masaharu Takahashi(Chiba Univ.) / Jiro Hirokawa(Tokyo Tech.) |
| Vice Chair | / Ryo Yamaguchi(SoftBank) |
| Secretary | (Hokkaido Univ.) / Ryo Yamaguchi(Yamaguchi Univ.) |
| Assistant | Masahiro Hanazawa(UL Japan) / Nozomi Haga(Gunma Univ.) / Michitaka Ameya(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Wireless Power Transfer / Technical Committee on Antennas and Propagation |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Tutorial Lecture] Quality factor of electrically small antennas and their broadbanding |
| Sub Title (in English) | |
| Keyword(1) | small antenna |
| Keyword(2) | bandwidth enhancement |
| Keyword(3) | equivalent circuit |
| Keyword(4) | maximum bandwidth |
| Keyword(5) | multi-mode |
| Keyword(6) | planar antenna |
| Keyword(7) | Q factor |
| 1st Author's Name | Keisuke Noguchi |
| 1st Author's Affiliation | Kanazawa Institute of Technology(KIT) |
| Date | 2019-01-17 |
| Paper # | AP2018-157,WPT2018-57 |
| Volume (vol) | vol.118 |
| Number (no) | AP-390,WPT-391 |
| Page | pp.pp.33-38(AP), pp.19-24(WPT), |
| #Pages | 6 |
| Date of Issue | 2019-01-10 (AP, WPT) |