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Paper Abstract and Keywords
Presentation 2007-10-18 13:50
Some Considerations of the Dips of the Antenna Efficiency Based on the Reflection Method Using the Method of Moments with Wire-Grid Model
Takashi Murayama, Nozomu Ishii, Yasuo Katagiri, Michio Miyakawa (Niigata Univ.) AP2007-88
Abstract (in Japanese) (See Japanese page) 
(in English) The Wheeler method and reflection method are known as accurate and simple methods for measuring the radiation efficiency of small antennas. In these methods, the radiation efficiency can be evaluated by measuring the reflection coefficient of the antenna in free space and in the sheilding cavity or the waveguide with two sliding shorts. However, some dips of the radiation efficiency can be observed because of the cavity formed by the waveguide and two sliding shorts. Especially, the authors have proposed some techniques for avoiding the dips in the reflection method. In this report, we simulate reflection coefficients by the method of moments with the wire-grid model. We consider numerical dips of efficiency, after showing that the simulated results agree with measured ones.
Keyword (in Japanese) (See Japanese page) 
(in English) Wheeler method / Reflection method / Method of moment / Wire-grid model / Radiation efficiency / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 260, AP2007-88, pp. 9-14, Oct. 2007.
Paper # AP2007-88 
Date of Issue 2007-10-11 (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)
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Conference Information
Committee AP  
Conference Date 2007-10-18 - 2007-10-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Hirosaki Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) etc. 
Paper Information
Registration To AP 
Conference Code 2007-10-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Some Considerations of the Dips of the Antenna Efficiency Based on the Reflection Method Using the Method of Moments with Wire-Grid Model 
Sub Title (in English)  
Keyword(1) Wheeler method  
Keyword(2) Reflection method  
Keyword(3) Method of moment  
Keyword(4) Wire-grid model  
Keyword(5) Radiation efficiency  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Takashi Murayama  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Nozomu Ishii  
2nd Author's Affiliation Niigata University (Niigata Univ.)
3rd Author's Name Yasuo Katagiri  
3rd Author's Affiliation Niigata University (Niigata Univ.)
4th Author's Name Michio Miyakawa  
4th Author's Affiliation Niigata University (Niigata Univ.)
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Speaker Author-1 
Date Time 2007-10-18 13:50:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2007-88 
Volume (vol) vol.107 
Number (no) no.260 
Page pp.9-14 
#Pages 6 
Date of Issue 2007-10-11 (AP) 

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