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Paper Abstract and Keywords
Presentation 2008-01-25 13:40
Radiation Efficiency of Lossy Planar Dipole Antenna
Qiaowei Yuan, Toru Uno, Takuji Arima (Tokyo Univ. of Agriculture and Tech.), Qiang Chen, Kunio Sawaya (Tohoku Univ.) AP2007-152
Abstract (in Japanese) (See Japanese page) 
(in English) The conductivity, the thickness and the surface roughness of conductor have been thought the factors which perhaps affect the radiation efficiency. In this paper, the effects of these factors on antenna radiation efficiency will be investigated by using a lossy planar dipole numerically. In the first part of this paper, a full-wave MoM based on 3-dimensional volume integral equation (VIE-MoM) is used to calculate the radiation efficiency to investigate the effect caused by the conductor thickness. The radiation efficiencies are further compared with those obtained by MoM based on 2-dimensional integral equation where the conductor loss is included in the surface impedance(SI-MoM). It is shown that the radiation efficiency decreases when the conductor becomes thinner. Although the radiation efficiency calculated by the VIE-MoM disagrees with that obtained by SI-MoM for most conductivity and thickness, there are no significant difference between two radiation efficiencies when the conductivity of the conductor approaches to the copper's one. In the second part of this paper, the surface impedance is modified to include the effect of moisture standing in the surface roughness by using transmission line theory. It is found that radiation efficiency is reduced when the conductor is covered with a water layer whose thickness is in order of several ums.
Keyword (in Japanese) (See Japanese page) 
(in English) antenna / radiation efficiency / conductivity / thickness / sSurface roughness / MoM / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 431, AP2007-152, pp. 173-178, Jan. 2008.
Paper # AP2007-152 
Date of Issue 2008-01-16 (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 2008-01-23 - 2008-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Tyeruru.(Naha) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) etc. 
Paper Information
Registration To AP 
Conference Code 2008-01-AP 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Radiation Efficiency of Lossy Planar Dipole Antenna 
Sub Title (in English)  
Keyword(1) antenna  
Keyword(2) radiation efficiency  
Keyword(3) conductivity  
Keyword(4) thickness  
Keyword(5) sSurface roughness  
Keyword(6) MoM  
Keyword(7)  
Keyword(8)  
1st Author's Name Qiaowei Yuan  
1st Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech.)
2nd Author's Name Toru Uno  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech.)
3rd Author's Name Takuji Arima  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech.)
4th Author's Name Qiang Chen  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Kunio Sawaya  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-2 
Date Time 2008-01-25 13:40:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2007-152 
Volume (vol) vol.107 
Number (no) no.431 
Page pp.173-178 
#Pages 6 
Date of Issue 2008-01-16 (AP) 

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