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| Presentation | 2006-07-27 14:00 [Technology Exhibit] Investigation on fundamental elements for reconfigurable RF front-end Shoichi Narahashi, Hiroshi Okazaki, Atsushi Fukuda, Kunihiro Kawai (NTT DoCoMo)  SR2006-18 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | Reconfigurable / RF circuits / Amplifiers / Filters / MEMS / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 106, no. 188, SR2006-18, pp. 31-34, July 2006. | |
| Paper # | SR2006-18 | |
| Date of Issue | 2006-07-20 (SR) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | SR2006-18 |
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| Conference Information | |
| Committee | SR |
| Conference Date | 2006-07-27 - 2006-07-28 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | YRP |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | SR |
| Conference Code | 2006-07-SR |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation on fundamental elements for reconfigurable RF front-end |
| Sub Title (in English) | |
| Keyword(1) | Reconfigurable |
| Keyword(2) | RF circuits |
| Keyword(3) | Amplifiers |
| Keyword(4) | Filters |
| Keyword(5) | MEMS |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Shoichi Narahashi |
| 1st Author's Affiliation | NTT DoCoMo, Inc. (NTT DoCoMo) |
| 2nd Author's Name | Hiroshi Okazaki |
| 2nd Author's Affiliation | NTT DoCoMo, Inc. (NTT DoCoMo) |
| 3rd Author's Name | Atsushi Fukuda |
| 3rd Author's Affiliation | NTT DoCoMo, Inc. (NTT DoCoMo) |
| 4th Author's Name | Kunihiro Kawai |
| 4th Author's Affiliation | NTT DoCoMo, Inc. (NTT DoCoMo) |
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| Speaker | Author-1 |
| Date Time | 2006-07-27 14:00:00 |
| Presentation Time | 150 minutes |
| Registration for | SR |
| Paper # | SR2006-18 |
| Volume (vol) | vol.106 |
| Number (no) | no.188 |
| Page | pp.31-34 |
| #Pages | 4 |
| Date of Issue | 2006-07-20 (SR) |
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