| Presentation | 2007/1/18 A Study on an Impedance Matching of Dipole Earphone Antennas with Varicap Dipole Attached to the Feedline for the Digital Terrestrial Broadcasting Reception Masato TANAKA, Ken-ichi ASANUMA, Tadahiko MAEDA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | New digital broadcasting services for portable radio device started in Japan. To realize the high quality TV reception in the mobile environments, it is important to use diversity techniques, which usually requires multiple antennas. Due to the limited space of the handheld terminals, it is relatively difficult to place multiple antennas to a mobile terminal. Therefore, a tunable dipole external earphone antenna was proposed and investigated. The last paper proposed a simple feeding circuit structure to tune the operating frequency with a varicap diode inserted to the feed point. However, there is a problem in terms of the impedance matching when the antenna is used in vicinity of human body. Therefore, the focus of this paper is a modified impedance matching circuit with a varicap diode attached to the other end of the feed line and assessing the impedance characteristics of the earphone antenna including the effects of human body. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Earphone Antenna / Digital Terrestrial Broadcasting / Human Body Effect / Impedance Matching |
| Paper # | A・P2006-114 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2007/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| 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) | A Study on an Impedance Matching of Dipole Earphone Antennas with Varicap Dipole Attached to the Feedline for the Digital Terrestrial Broadcasting Reception |
| Sub Title (in English) | |
| Keyword(1) | Earphone Antenna |
| Keyword(2) | Digital Terrestrial Broadcasting |
| Keyword(3) | Human Body Effect |
| Keyword(4) | Impedance Matching |
| 1st Author's Name | Masato TANAKA |
| 1st Author's Affiliation | Graduate School of Science and Engineering at Ritsumeikan University() |
| 2nd Author's Name | Ken-ichi ASANUMA |
| 2nd Author's Affiliation | Graduate School of Science and Engineering at Ritsumeikan University |
| 3rd Author's Name | Tadahiko MAEDA |
| 3rd Author's Affiliation | Graduate School of Science and Engineering at Ritsumeikan University |
| Date | 2007/1/18 |
| Paper # | A・P2006-114 |
| Volume (vol) | vol.106 |
| Number (no) | 491 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |