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Paper Abstract and Keywords
Presentation 2010-12-17 10:50
Design and evaluation of Vivaldi antenna for ground penetrating radar with focusing on surface current along antenna conductor
Naoki Hayashi, Motoyuki Sato (Tohoku Univ.) AP2010-122
Abstract (in Japanese) (See Japanese page) 
(in English) Design and evaluation of an antipodal Vivaldi antenna to be mounted on Ground Penetrating Radar (GPR) system are reported. So far, there is no quantitative index for a designing of an antenna conductor of the Vivaldi antenna, so it is difficult to suppress undesirable reflection of a surface current along an edge of the antenna conductor. In this paper, we utilize Finite Difference Time Domain (FDTD) method to visualize the surface current along the antenna conductor, and determine the shape of the antenna conductor to minimize the undesirable reflection of the surface current. As a result, both of the return coefficient (|S11|) and a time sidelobe level could be suppressed compared to the conventional antennas. As for the new antipodal Vivaldi antenna, the antenna size is 250mm by 200mm, the return coefficient (|S11|) is below -8dB in a frequency range of 0.5 – 6GHz and the time sidelobe level is 27dB lower than a main pulse.
Keyword (in Japanese) (See Japanese page) 
(in English) GPR / Vivaldi antenna / FDTD method / surface current / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 347, AP2010-122, pp. 25-30, Dec. 2010.
Paper # AP2010-122 
Date of Issue 2010-12-10 (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 AP2010-122

Conference Information
Committee AP  
Conference Date 2010-12-17 - 2010-12-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) AP 
Paper Information
Registration To AP 
Conference Code 2010-12-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design and evaluation of Vivaldi antenna for ground penetrating radar with focusing on surface current along antenna conductor 
Sub Title (in English)  
Keyword(1) GPR  
Keyword(2) Vivaldi antenna  
Keyword(3) FDTD method  
Keyword(4) surface current  
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1st Author's Name Naoki Hayashi  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Motoyuki Sato  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2010-12-17 10:50:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2010-122 
Volume (vol) vol.110 
Number (no) no.347 
Page pp.25-30 
#Pages 6 
Date of Issue 2010-12-10 (AP) 

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