| Presentation | 2005-07-28 A Band Reconfigurable High Efficiency Power Amplifier Employing RF-MEMS Switches Shoichi NARAHASHI, Hiroshi OKAZAKI, Atsushi FUKUDA, Kunihiro KAWAI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a future mobile ubiquitous world, all kinds of things will be interconnected as needed to form wireless networks that should arise frequently and simultaneously while changing continuously. Future mobile terminals will operate in the wireless environment in which a variety of wireless systems coexist and intermingle, and they will be expected to be available for all of those systems. Because a radio frequency (RF) circuit is an essential element of a mobile terminal, multi-band RF circuits have been researched. It is difficult for a PA, a key device of an RF circuit, to operate at multiple frequency bands with adequate performance. This paper describes a novel scheme for a multi-band power amplifier(PA) that employs a low-loss reconfigurable matching network. By controlling the on/off status of each switch, the matching network functions as a band-switchable matching network. A 900MHz/1900MHz dual-band, 1W class PA was fabricated with microelectro mechanical system (MEMS) SPST switches. The dual-band PA achieves over 60% of the maximum power-added efficiency with an output power for each band exceeding 30dBm. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | mobile ubiquitous / band-switchable matching network / MEMS switch / power amplifier |
| Paper # | SR2005-45 |
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| Committee | SR |
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| Conference Date | 2005/7/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Software Radio(SR) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Band Reconfigurable High Efficiency Power Amplifier Employing RF-MEMS Switches |
| Sub Title (in English) | |
| Keyword(1) | mobile ubiquitous |
| Keyword(2) | band-switchable matching network |
| Keyword(3) | MEMS switch |
| Keyword(4) | power amplifier |
| 1st Author's Name | Shoichi NARAHASHI |
| 1st Author's Affiliation | NTT DoCoMo() |
| 2nd Author's Name | Hiroshi OKAZAKI |
| 2nd Author's Affiliation | NTT DoCoMo |
| 3rd Author's Name | Atsushi FUKUDA |
| 3rd Author's Affiliation | NTT DoCoMo |
| 4th Author's Name | Kunihiro KAWAI |
| 4th Author's Affiliation | NTT DoCoMo |
| Date | 2005-07-28 |
| Paper # | SR2005-45 |
| Volume (vol) | vol.105 |
| Number (no) | 217 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |