| Presentation | 2000/12/7 Radiation Characteristics of a Built-in Antenna for a radio terminal Yutaka Saito, Isamu Nagano, Satoshi Yagitani, Hiroshi Haruki, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The built-in antenna presented in this paper has an extremely simple structure with a single three-quarter wavelength element, which has an impedance matching part. The antenna element can be considered to include two parts, an inverted F antenna (IFA) and a half wavelength monopole. On the view point of this consideration, the monopole is connected to the high impedance edge of the IFA. The advantage of this built-in antenna is that we can easily control its main polarization and radiation pattern by adjusting the location and direction of the monopole. In this paper, we apply the built-in antenna to a handy phone and a card radio terminal, and discuss their structures and radiation characteristics. When the handy phone was held in the talk position and the card radio terminal was worn on user's chest, we adjusted the antenna structures so that the maximum direction of the vertical polarization in the elevation patterns turned toward the horizontal direction. As a result, the pattern averaging gain (PAG) became between -3 dBd and -4.5 dBd, which was higher than those of the conventional antennas such as a planar inverted F antenna (PIFA) and a half-wavelength whip. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Monopole / IFA / PIFA / Handy phone / Card radio terminal |
| Paper # | A・P2000-146 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2000/12/7(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) | Radiation Characteristics of a Built-in Antenna for a radio terminal |
| Sub Title (in English) | |
| Keyword(1) | Monopole |
| Keyword(2) | IFA |
| Keyword(3) | PIFA |
| Keyword(4) | Handy phone |
| Keyword(5) | Card radio terminal |
| 1st Author's Name | Yutaka Saito |
| 1st Author's Affiliation | Faculty of Engineering, Kanazawa University : Matsushita Communication Kanazawa R&D Labs. Co., Ltd.() |
| 2nd Author's Name | Isamu Nagano |
| 2nd Author's Affiliation | Faculty of Engineering, Kanazawa University |
| 3rd Author's Name | Satoshi Yagitani |
| 3rd Author's Affiliation | Faculty of Engineering, Kanazawa University |
| 4th Author's Name | Hiroshi Haruki |
| 4th Author's Affiliation | Matsushita Communication Industrial Co., Ltd. |
| Date | 2000/12/7 |
| Paper # | A・P2000-146 |
| Volume (vol) | vol.100 |
| Number (no) | 493 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |