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| Presentation | 2014-05-29 11:10 Evaluation of Reception Properties of ESPAR Antenna with Periodically Variable Directivity Yusuke Idoguchi, Masato Saito (Ryukyu Univ.)  AP2014-22 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this study, we made prototypes of ESPAR (Electronically Steerable Passive Array Radiator) antennas whose directivity can periodically change and measured characteristics of the antennas. The antenna pattern of the antennas can be time-variable according to the incurred voltage of dc and sinusoidal waveform to the variable reactance which is connected to the parasitic element of the antennas. The periodically variable directivity can make the received signal components frequency-shifted according to the frequency of the sinusoidal waveform. The multiple received signals in different frequencies can be utilized as diversity branches to obtain diversity gain. According to the experimental results we can see that the antenna can provide time-variable antenna patterns with different phase to the received signals from opposite directions. Besides, we could increase the power of frequency-shifted components by increasing the antenna pattern variation. As a conclusion, the prototypes can contribute to realize the diversity of combined antenna pattern and path and to improve the diversity gain. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | ESPAR antenna / time-variable antenna pattern / antenna pattern diversity / path diversity / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 62, AP2014-22, pp. 17-22, May 2014. | |
| Paper # | AP2014-22 | |
| Date of Issue | 2014-05-22 (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 | AP2014-22 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2014-05-29 - 2014-05-30 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawa Industory Support Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Antennas and Propagation |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2014-05-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Evaluation of Reception Properties of ESPAR Antenna with Periodically Variable Directivity |
| Sub Title (in English) | |
| Keyword(1) | ESPAR antenna |
| Keyword(2) | time-variable antenna pattern |
| Keyword(3) | antenna pattern diversity |
| Keyword(4) | path diversity |
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| Keyword(8) | |
| 1st Author's Name | Yusuke Idoguchi |
| 1st Author's Affiliation | University of the Ryukyus (Ryukyu Univ.) |
| 2nd Author's Name | Masato Saito |
| 2nd Author's Affiliation | University of the Ryukyus (Ryukyu Univ.) |
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| Speaker | Author-1 |
| Date Time | 2014-05-29 11:10:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2014-22 |
| Volume (vol) | vol.114 |
| Number (no) | no.62 |
| Page | pp.17-22 |
| #Pages | 6 |
| Date of Issue | 2014-05-22 (AP) |
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