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Paper Abstract and Keywords
Presentation 2026-01-22 11:20
Wideband Design of Double-Layer Corporate-Feed Waveguide 64x64-Slot Array Antenna
Hinata Ishikawa, Jiro Hirokawa, Takashi Tomura (Science Tokyo) AP2025-194
Abstract (in Japanese) (See Japanese page) 
(in English) A wideband design of a double-layer corporate-feed waveguide 64×64-slot array antenna is presented. In waveguide slot array antennas with a large number of elements, thin and long metallic patterns are required. Therefore, when a conventional single-layer feed waveguide was used, deformation may occur during the manufacturing process based on the diffusion bonding of laminated thin metal plates. This deformation can cause phase differences in the excitation of each element. In previous studies, this problem was suppressed by employing a double-layer feed waveguide. However, the bandwidth remained narrow. In this manuscript, to suppress gain degradation, a double-layer corporate-feed waveguide configuration is adopted, as in the previous studies, and a wideband 64×64-slot array antenna is designed. The reflection characteristics satisfy VSWR < 1.5 from 111.5 GHz to 150.5 GHz with a fractional bandwidth of 29.8%. The antenna efficiency exceeds 60% within the bandwidth.
Keyword (in Japanese) (See Japanese page) 
(in English) Waveguide slot array / Diffusion bonding / Corporate-feed / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 318, AP2025-194, pp. 92-95, Jan. 2026.
Paper # AP2025-194 
Date of Issue 2026-01-14 (AP) 
ISSN 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 AP2025-194

Conference Information
Committee AP WPT  
Conference Date 2026-01-21 - 2026-01-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Amami City Aiai Hiroba 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Radio propagation, Wireless transmission technology, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2026-01-AP-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Wideband Design of Double-Layer Corporate-Feed Waveguide 64x64-Slot Array Antenna 
Sub Title (in English)  
Keyword(1) Waveguide slot array  
Keyword(2) Diffusion bonding  
Keyword(3) Corporate-feed  
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1st Author's Name Hinata Ishikawa  
1st Author's Affiliation Institute of Science Tokyo (Science Tokyo)
2nd Author's Name Jiro Hirokawa  
2nd Author's Affiliation Institute of Science Tokyo (Science Tokyo)
3rd Author's Name Takashi Tomura  
3rd Author's Affiliation Institute of Science Tokyo (Science Tokyo)
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Speaker Author-1 
Date Time 2026-01-22 11:20:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2025-194 
Volume (vol) vol.125 
Number (no) no.318 
Page pp.92-95 
#Pages 4 
Date of Issue 2026-01-14 (AP) 

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