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| Presentation | 2011-03-03 09:55 A Novel Feeding Circuit with Switching Function of Cardioid and Figure of Eight Radiation Patterns Daisuke Uchida, Hiroyuki Arai (Yokohama National Univ.), Young Joong Yoon (Yonsei Univ.)  AP2010-175 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In diversity and MIMO applications, pattern reconfigurable techniques are required because the propagation path of a radio wave can be changed. Previously, switched-beam antennas based on the Butler matrix was proposed. However, the purpose was to switch the beam direction, and the shapes of the beams could not be changed. In this report, we propose a novel feeding circuit with switching function of cardioid and figure of eight radiation patterns. The basic structures of the proposed circuit are combinations of the 90 and 180 degree hybrid circuits, and both pattern shapes and directions are changed by switching feeding elements and phase difference feeds. We show the amplitude and phase characteristics of the output signal obtained by the proposed feeding circuit. Then, we reveal that cardioid and figure of eight radiation patterns are achieved when mutual coupling effects are suppressed sufficiently. Even if the effects are not suppressed, uni-directional with F/B ratio of more than 10 dB and bi-directional radiation patterns are obtained. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Beam switched antennas / feeding circuit / array antenna / phase difference feed / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 446, AP2010-175, pp. 7-12, March 2011. | |
| Paper # | AP2010-175 | |
| Date of Issue | 2011-02-24 (AP) | |
| 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 | AP2010-175 |
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| Conference Information | |
| Committee | AP MW |
| Conference Date | 2011-03-03 - 2011-03-04 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ibaraki Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | AP, MW |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2011-03-AP-MW |
| Language | English (Japanese title is available) |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Novel Feeding Circuit with Switching Function of Cardioid and Figure of Eight Radiation Patterns |
| Sub Title (in English) | |
| Keyword(1) | Beam switched antennas |
| Keyword(2) | feeding circuit |
| Keyword(3) | array antenna |
| Keyword(4) | phase difference feed |
| Keyword(5) | |
| Keyword(6) | |
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| Keyword(8) | |
| 1st Author's Name | Daisuke Uchida |
| 1st Author's Affiliation | Yokohama National University (Yokohama National Univ.) |
| 2nd Author's Name | Hiroyuki Arai |
| 2nd Author's Affiliation | Yokohama National University (Yokohama National Univ.) |
| 3rd Author's Name | Young Joong Yoon |
| 3rd Author's Affiliation | Yonsei University (Yonsei Univ.) |
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| Speaker | Author-1 |
| Date Time | 2011-03-03 09:55:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2010-175 |
| Volume (vol) | vol.110 |
| Number (no) | no.446 |
| Page | pp.7-12 |
| #Pages | 6 |
| Date of Issue | 2011-02-24 (AP) |
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