Presentation | 2006-07-27 RF Front End Circuits employing Reconfigurable Structures 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 various kind of wireless systems co-exist and intermingle, and they will be expected to be available for all of those systems. For this purpose, multi-band radio frequency (RF) circuit has been researched to attain multiple frequency band operation because it is an essential element of a mobile terminal. It is, however, difficult for PA and filter to operate at multiple frequency bands with adequate performance. This paper describes a novel scheme for a multi-band power amplifier (PA) and a tunable filter. The PA employs a low-loss reconfigurable matching network with RF-MEMS (Micro-Electro-Mechanical-System) switches. By controlling the on/off status of each switch, the matching network functions as a band-switchable matching network. The tunable filter comprises tunable resonators and coupling circuits. The tunable resonator has a comb-shaped end-shorted transmission line and switches. Resonant frequency of the resonator changes in accordance with the state of the switches. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | Reconfigurable / RF circuits / Amplifiers / Filters / MEMS |
Paper # | SR2006-18 |
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Committee | SR |
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Conference Date | 2006/7/20(1days) |
Place (in Japanese) | (See Japanese page) |
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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) | RF Front End Circuits employing Reconfigurable Structures |
Sub Title (in English) | |
Keyword(1) | Reconfigurable |
Keyword(2) | RF circuits |
Keyword(3) | Amplifiers |
Keyword(4) | Filters |
Keyword(5) | MEMS |
1st Author's Name | Shoichi NARAHASHI |
1st Author's Affiliation | NTT DoCoMo, Inc.() |
2nd Author's Name | Hiroshi OKAZAKI |
2nd Author's Affiliation | NTT DoCoMo, Inc. |
3rd Author's Name | Atsushi FUKUDA |
3rd Author's Affiliation | NTT DoCoMo, Inc. |
4th Author's Name | Kunihiro KAWAI |
4th Author's Affiliation | NTT DoCoMo, Inc. |
Date | 2006-07-27 |
Paper # | SR2006-18 |
Volume (vol) | vol.106 |
Number (no) | 188 |
Page | pp.pp.- |
#Pages | 4 |
Date of Issue |