| Presentation | 2002/10/11 Basic Theory on 2-element Espar Antennas from Reactance Diversity Viewpoint Takashi OHIRA, Kyoichi IIGUSA, Makoto TAROMARU, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a basic theory on 2-element Espar antennas from the viewpoint of reactance diversity. Electromagnetic mutual coupling between the two elements is formulated by using a simple explicit admittance matrix expression as a function of the element interval. The admittance matrix and the load reactance characterize the antenna performances such as weight vector, radiation directivity, and port impedance. We propose a simple diversity scheme that employs binary reactance control based on the criterion of received power comparison. Computer simulations show that the diversity gain of 14 dB is expected at 99 percent cumulative probability in comparison with conventional omni-directional antennas. The diversity gain depends on the reactance value and is maximized at about -30 to -90 ohms. It does not strongly depend on the element interval. The binary-reactance diversity will pave the way to let the high performance antennas pervade even low-end consumer wireless devices. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | reactance / diversity / antenna / fading / parasite / coupling / varactor / consumer / wireless |
| Paper # | AP2002-93 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2002/10/11(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) | Basic Theory on 2-element Espar Antennas from Reactance Diversity Viewpoint |
| Sub Title (in English) | |
| Keyword(1) | reactance |
| Keyword(2) | diversity |
| Keyword(3) | antenna |
| Keyword(4) | fading |
| Keyword(5) | parasite |
| Keyword(6) | coupling |
| Keyword(7) | varactor |
| Keyword(8) | consumer |
| Keyword(9) | wireless |
| 1st Author's Name | Takashi OHIRA |
| 1st Author's Affiliation | ATR Adaptive Communications Research Laboratories() |
| 2nd Author's Name | Kyoichi IIGUSA |
| 2nd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 3rd Author's Name | Makoto TAROMARU |
| 3rd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| Date | 2002/10/11 |
| Paper # | AP2002-93 |
| Volume (vol) | vol.102 |
| Number (no) | 389 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |