| Presentation | 2003/7/25 Parameter Extraction of Espar Antenna and Calibration of Varactor-Controlled Characteristics Based on the Reactive-Near-Field Measurement Qing HAN, Keizo INAGAKI, Brett HANNA, Kyoichi IIGUSA, Takashi OHIRA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is difficult to consider an ESPAR antenna with separate radiator and varactor in the antenna's measurement since beamforming of the ESPAR antenna is performed by controlling the bias voltage of the varactors integrated at the base of its parasitic elements. In this paper, we consider extracting the parameters of the impedance matrix by using a measurement method. An equivalent weight vector model is proposed and the reactive-near-field probing technique is used to extract the parameters. Because the antenna's impedance matrix describing the electromagnetic mutual coupling of the antenna's elements are constant without the influence of varying reactance and excitation signal, we try to extract the parameters of the impedance matrix by taking the minimum time of measurement. As a result, it was shown that the parameters of the impedance matrix were extracted by only two times of the current measurement under two setsof different bias voltages without depending on the numbers of the antenna. Furthermore, calibration of the antenna's reactance was also shown. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Espar antenna / Equivalent Weight Vector / Reactive-near-field / Parameter extraction / Calibration |
| Paper # | A・P2003-113 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2003/7/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Parameter Extraction of Espar Antenna and Calibration of Varactor-Controlled Characteristics Based on the Reactive-Near-Field Measurement |
| Sub Title (in English) | |
| Keyword(1) | Espar antenna |
| Keyword(2) | Equivalent Weight Vector |
| Keyword(3) | Reactive-near-field |
| Keyword(4) | Parameter extraction |
| Keyword(5) | Calibration |
| 1st Author's Name | Qing HAN |
| 1st Author's Affiliation | ATR Adaptive Communications Research Laboratories() |
| 2nd Author's Name | Keizo INAGAKI |
| 2nd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 3rd Author's Name | Brett HANNA |
| 3rd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 4th Author's Name | Kyoichi IIGUSA |
| 4th Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 5th Author's Name | Takashi OHIRA |
| 5th Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| Date | 2003/7/25 |
| Paper # | A・P2003-113 |
| Volume (vol) | vol.103 |
| Number (no) | 232 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |