| Presentation | 2004/2/12 Characteristics of built-in half size of folded dipole antenna for handsets Shogo Hayashida, Tomoki Tanaka, Hisashi Morishita, Yoshio Koyanagi, Kyohei Fujimoto, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A folded loop antenna for handset has been introduced as one of balance-fed antenna for handsets, which is very effective to mitigate the antenna performance degradation due to the body effect. In order to meet the requirements for the latest handsets such as small size and lower profile, a folded loop antenna is modified to have low profile and small size structure. The performance is analyzed comparing with a planar inverted-F antenna (PEFA), which is one of conventional antennas. Low profile is achieved by folding a loop element sideways so that the antenna can be placed closely on the ground plane (GP). In addition, small size is achieved by consisting of the half of low profile folded loop antenna element, which folded a loop element sideways. In the analysis, the electromagnetic simulator based on FDTD method is used. As a result, it has been confirmed that the antenna, which is introduced here, has smaller size and broaden characteristics compared with PIFA. The bandwidth (VSWR^2) is about 16% at center frequency 2250MHz and the antenna is 60% the size of PBFA. Moreover, the current distributions and radiation patterns are analyzed at the center frequency. The calculated results are in good agreement with the measured results. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Antenna for handsets / Folded loop antenna / Balance-fed antennas / Small size |
| Paper # | A・P2003-269 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2004/2/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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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) | Characteristics of built-in half size of folded dipole antenna for handsets |
| Sub Title (in English) | |
| Keyword(1) | Antenna for handsets |
| Keyword(2) | Folded loop antenna |
| Keyword(3) | Balance-fed antennas |
| Keyword(4) | Small size |
| 1st Author's Name | Shogo Hayashida |
| 1st Author's Affiliation | National Defense Academy() |
| 2nd Author's Name | Tomoki Tanaka |
| 2nd Author's Affiliation | National Defense Academy |
| 3rd Author's Name | Hisashi Morishita |
| 3rd Author's Affiliation | National Defense Academy |
| 4th Author's Name | Yoshio Koyanagi |
| 4th Author's Affiliation | Panasonic Mobile Communications |
| 5th Author's Name | Kyohei Fujimoto |
| 5th Author's Affiliation | FAIS |
| Date | 2004/2/12 |
| Paper # | A・P2003-269 |
| Volume (vol) | vol.103 |
| Number (no) | 655 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |