Paper Abstract and Keywords |
Presentation |
2008-12-18 11:25
Two-bit Variable Frequency Resonator using Transmission Line and RF switches Jun-ichi Ohtsuka, Hiroki Mori, Ryo-ta Fukuda, Yasushi Yamao (The University of Electro-Communications) RCS2008-156 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Since multiple frequency bands are used for mobile communication systems, the current terminals are installed with multiple radio circuits that cover each frequency band individually and one of them is selected for use. In order to make efficient use of frequency specrum and to reduce circuit scale of terminals in the future, reconfigurable RF circuits will be necessary that are able to change flexibly many frequencies. This paper proposes two-bit variable frequency resonator that can change four resonance frequencies with two RF switches and a transmission line. Three kinds of variable resonance circuits, employing /2 resonance mode, /4 resonance mode and their combined mode, are included in the proposal. After the advantages for the three mode circuits are compared, frequency characteristics are analyzed by circuit simulations. A preliminary prototype using a high dielectric print substrate has been fabricated and evaluated for the /4 resonance mode resonator, which has advantage in conpactness. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Reconfigurable RF circuit / /4 resonator / Transmission line resonator / RF switch / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 108, no. 358, RCS2008-156, pp. 31-36, Dec. 2008. |
Paper # |
RCS2008-156 |
Date of Issue |
2008-12-11 (RCS) |
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) |
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RCS2008-156 |
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