| Presentation | 2017-08-25 Far-Field Estimation of Antenna above the Earth by Source Reconstruction from Hemispherical Near-Field Yoshiki Sugimoto, Hiroyuki Arai, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Antenna measurements are done in an anechoic chamber, its characteristics regarded as equal to the characteristics in free space. Actual far-field pattern is different from the far-field in free space because it is affected by the earth. Therefore we need to estimate the far-field pattern when the antennas are placed above the earth from the measurement data in anechoic chamber for obtaining the practical antenna pattern. This report proposes the method of far-field estimation when the antenna above the earth using north hemispherical near-field data measured in anechoic chamber. We apply the inverse problem to the hemispherical near-field data in free space, it can be estimate surface current of the antenna accurately using forward reconstructed full-spherical near-field data from reconstructed surface current. The far-field when the antenna is placed on the earth of arbitrary electric constant is obtained by considering the image current of the reconstructed surface current. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Near-field measurement / Far-field estimation / Far-field on the earth / Inverse problem / Hemispherical measurement |
| Paper # | AP2017-81 |
| Date of Issue | 2017-08-17 (AP) |
| Conference Information | |
| Committee | AP |
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| Conference Date | 2017/8/24(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | National Institute of Technology, Hakodate College |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Antennas and Propagation |
| Chair | Jiro Hirokawa(Tokyo Tech.) |
| Vice Chair | Ryo Yamaguchi(SoftBank) |
| Secretary | Ryo Yamaguchi(NTT DoCoMo) |
| Assistant | Nobuyasu Takemura(Nippon Inst. of Tech.) / Satoshi Yamaguchi(Mitsubishi Electric) |
| Paper Information | |
| Registration To | 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) | Far-Field Estimation of Antenna above the Earth by Source Reconstruction from Hemispherical Near-Field |
| Sub Title (in English) | |
| Keyword(1) | Near-field measurement |
| Keyword(2) | Far-field estimation |
| Keyword(3) | Far-field on the earth |
| Keyword(4) | Inverse problem |
| Keyword(5) | Hemispherical measurement |
| 1st Author's Name | Yoshiki Sugimoto |
| 1st Author's Affiliation | Yokohama National University(YNU) |
| 2nd Author's Name | Hiroyuki Arai |
| 2nd Author's Affiliation | Yokohama National University(YNU) |
| Date | 2017-08-25 |
| Paper # | AP2017-81 |
| Volume (vol) | vol.117 |
| Number (no) | AP-181 |
| Page | pp.pp.71-74(AP), |
| #Pages | 4 |
| Date of Issue | 2017-08-17 (AP) |