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Paper Abstract and Keywords
Presentation 2009-01-23 11:45
Reflection improvement of a center-feed post-wall waveguide circuit of T-junctions in a parallel-plate slot array antenna and sidelobe suppression by reduction of no slot area
Koh Hashimoto, Jiro Hirokawa, Makoto Ando (Tokyo tech.) AP2008-180
Abstract (in Japanese) (See Japanese page) 
(in English) A center-feed waveguide consisting of T-junctions has been proposed to reduce the no-slot area of a post-wall waveguide center-fed parallel plate slot array for suppressing the sidelobes in the E-plane. This waveguide has been suffering from reflection in the conventional design based on the method of moments replacing the post-walls with solid-walls. We propose a novel design procedure for the T-junctions to suppress the reflection by including the shape of the posts in HFSS analysis. The reflection of the antenna designed by this method is improved by more than 10 dB in comparison with that of the conventional design antenna over 1 GHz bandwidth around the design frequency. The peak of the measured gain is 33.4 dBi. The efficiency is 61.0 % for the aperture size including the no-slot area. The sidelobe suppression in the E-plane by using 8.3 dB amplitude tapered slot excitation is also presented.
Keyword (in Japanese) (See Japanese page) 
(in English) center-feed / post-wall waveguide / parallel plate slot array / sidelobe suppression / no-slot area / T-junction / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 386, AP2008-180, pp. 175-180, Jan. 2009.
Paper # AP2008-180 
Date of Issue 2009-01-14 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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 AP2008-180

Conference Information
Committee AP  
Conference Date 2009-01-21 - 2009-01-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukuoka University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Etc. 
Paper Information
Registration To AP 
Conference Code 2009-01-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Reflection improvement of a center-feed post-wall waveguide circuit of T-junctions in a parallel-plate slot array antenna and sidelobe suppression by reduction of no slot area 
Sub Title (in English)  
Keyword(1) center-feed  
Keyword(2) post-wall waveguide  
Keyword(3) parallel plate slot array  
Keyword(4) sidelobe suppression  
Keyword(5) no-slot area  
Keyword(6) T-junction  
Keyword(7)  
Keyword(8)  
1st Author's Name Koh Hashimoto  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo tech.)
2nd Author's Name Jiro Hirokawa  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo tech.)
3rd Author's Name Makoto Ando  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo tech.)
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Speaker Author-1 
Date Time 2009-01-23 11:45:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2008-180 
Volume (vol) vol.108 
Number (no) no.386 
Page pp.175-180 
#Pages 6 
Date of Issue 2009-01-14 (AP) 

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