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| Presentation | 2014-09-19 12:35 A Miniaturized Broadband Lumped Element Circulator for Tunable Front-end system Reiji Nakajima, Yuki Nakaike, Takaya Wada, Makoto Kawashima (Murata Manufacturing)  MW2014-94 Link to ES Tech. Rep. Archives: MW2014-94 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A novel miniaturized broadband circulator for reconfigurable mobile handsets has been successfully developed. The circulator operating in a weak magnetic field below ferromagnetic resonance are derived by analyzing the equivalent circuit. The operating theory of the circulator has been confirmed by using the perturbation theory. The usable isolation band could be expanded to 1.71GHz to 2.17GHz, which is a very small sized 1.2 × 1.0 × h0.5 mm such as 1/25 compared with the conventional one, Core-Circulator is realized. The developed circulator keeps characteristics as the insertion loss of 1.1dB maximum and the TX-RX isolation of 21dB minimum which have achieved the requirements of the tunable RF front-end. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Admittance matrix / Lumped element microwave circuit / circulators / a weak magnetic field / ferrites / microwave devices / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 219, MW2014-94, pp. 49-53, Sept. 2014. | |
| Paper # | MW2014-94 | |
| Date of Issue | 2014-09-11 (MW) | |
| 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 | MW2014-94 Link to ES Tech. Rep. Archives: MW2014-94 |
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| Conference Information | |
| Committee | AP MW |
| Conference Date | 2014-09-18 - 2014-09-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Institute of Technology, Ookayama Campus |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave and Millimeter-wave, Metamaterials, Antennas and Propagation, Student Session |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2014-09-AP-MW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Miniaturized Broadband Lumped Element Circulator for Tunable Front-end system |
| Sub Title (in English) | |
| Keyword(1) | Admittance matrix |
| Keyword(2) | Lumped element microwave circuit |
| Keyword(3) | circulators |
| Keyword(4) | a weak magnetic field |
| Keyword(5) | ferrites |
| Keyword(6) | microwave devices |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Reiji Nakajima |
| 1st Author's Affiliation | Murata Manufacturing Co., Ltd. (Murata Manufacturing) |
| 2nd Author's Name | Yuki Nakaike |
| 2nd Author's Affiliation | Murata Manufacturing Co., Ltd. (Murata Manufacturing) |
| 3rd Author's Name | Takaya Wada |
| 3rd Author's Affiliation | Murata Manufacturing Co., Ltd. (Murata Manufacturing) |
| 4th Author's Name | Makoto Kawashima |
| 4th Author's Affiliation | Murata Manufacturing Co., Ltd. (Murata Manufacturing) |
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| Speaker | Author-1 |
| Date Time | 2014-09-19 12:35:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | MW2014-94 |
| Volume (vol) | vol.114 |
| Number (no) | no.219 |
| Page | pp.49-53 |
| #Pages | 5 |
| Date of Issue | 2014-09-11 (MW) |
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