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Paper Abstract and Keywords
Presentation 2025-01-24 09:20
Design of circularly polarized folded reflectarray antennas with high aperture efficiency and low sidelobes
Makoto Sano, Ryuji Kuse, Takeshi Fukusako (Kumamoto Univ.) AP2024-178
Abstract (in Japanese) (See Japanese page) 
(in English) This report presents a new design method of realizing high aperture efficiency and desired radiation characteristics of circularly polarized folded reflectarray antennas composed of a circular polarization selective surface (CPSS) and a reflectarray (RA). Effects of the discrete CPSS and RA elements are considered in the proposed method. The reflection-phase distribution of the CPSS expressed using a polynomial is determined to optimize the objective function for the directivity. High aperture efficiency of 76.8% is observed at the design frequency of 18.95 GHz in full-wave simulation of a folded reflectarray antenna having the reflection-phase distribution optimized to maximize the directivity. It is also shown that high aperture efficiency of 65.4% is realized while keeping the sidelobe levels (SLLs) below $-20$ dB.
Keyword (in Japanese) (See Japanese page) 
(in English) folded reflectarray antenna / circular polarization / high efficiency / low sidelobes / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 341, AP2024-178, pp. 60-65, Jan. 2025.
Paper # AP2024-178 
Date of Issue 2025-01-16 (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 AP2024-178

Conference Information
Committee AP WPT  
Conference Date 2025-01-23 - 2025-01-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Rokan, Matsue 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Radio propagation, Wireless transmission technology, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2025-01-AP-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design of circularly polarized folded reflectarray antennas with high aperture efficiency and low sidelobes 
Sub Title (in English)  
Keyword(1) folded reflectarray antenna  
Keyword(2) circular polarization  
Keyword(3) high efficiency  
Keyword(4) low sidelobes  
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1st Author's Name Makoto Sano  
1st Author's Affiliation Kumamoto University (Kumamoto Univ.)
2nd Author's Name Ryuji Kuse  
2nd Author's Affiliation Kumamoto University (Kumamoto Univ.)
3rd Author's Name Takeshi Fukusako  
3rd Author's Affiliation Kumamoto University (Kumamoto Univ.)
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Speaker Author-1 
Date Time 2025-01-24 09:20:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2024-178 
Volume (vol) vol.124 
Number (no) no.341 
Page pp.60-65 
#Pages 6 
Date of Issue 2025-01-16 (AP) 

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