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Paper Abstract and Keywords
Presentation 2025-11-12 10:20
Design of Conformal RIS Using Flexible Printed Circuits with Air Gaps
Kanata Okada, Taisei Urakami (NIT, Kagawa College), Tamami Maruyama (Hiroshima Inst. of Tech.), Akira Ono (NIT, Kagawa College), Na Chen (Univ. of Science and Tech. Beijing/NAIST), Minoru Okada (NAIST) AP2025-151 RCS2025-148
Abstract (in Japanese) (See Japanese page) 
(in English) Conventional planar metasurface reflectors restrict their installation location to flat wall surfaces. To install the reflectors on curved surface shapes (dome, cars, etc.), conformal reconfigurable intelligent surface (CRIS) with a flexible printed circuit (FPC) substrate have been proposed. Since the thickness of the FPC substrates are from 0.08 mm to 0.26 mm, it is difficult to control the reflection phase due to the small inductance of thin substrate. In this paper, we propose a CRIS with air gaps between two FPC substrates. Based on generalized Snell's law, electromagnetic field simulations demonstrate that designing the proposed reflector enables adaptive control of the reflection direction even when the reflector's shape changes.
Keyword (in Japanese) (See Japanese page) 
(in English) Metasurface Reflector / Reconfigurable Intelligent Surface / Electromagnetic Field / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 241, AP2025-151, pp. 7-12, Nov. 2025.
Paper # AP2025-151 
Date of Issue 2025-11-05 (AP, RCS) 
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 AP2025-151 RCS2025-148

Conference Information
Committee AP RCS  
Conference Date 2025-11-12 - 2025-11-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime Prefectural Convention Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. 
Paper Information
Registration To AP 
Conference Code 2025-11-AP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design of Conformal RIS Using Flexible Printed Circuits with Air Gaps 
Sub Title (in English)  
Keyword(1) Metasurface Reflector  
Keyword(2) Reconfigurable Intelligent Surface  
Keyword(3) Electromagnetic Field  
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1st Author's Name Kanata Okada  
1st Author's Affiliation National Institute of Technology, Kagawa College (NIT, Kagawa College)
2nd Author's Name Taisei Urakami  
2nd Author's Affiliation National Institute of Technology, Kagawa College (NIT, Kagawa College)
3rd Author's Name Tamami Maruyama  
3rd Author's Affiliation Hiroshima Institute of Technology (Hiroshima Inst. of Tech.)
4th Author's Name Akira Ono  
4th Author's Affiliation National Institute of Technology, Kagawa College (NIT, Kagawa College)
5th Author's Name Na Chen  
5th Author's Affiliation University of Science and Technology Beijing/Nara Institute of Science and Technology (Univ. of Science and Tech. Beijing/NAIST)
6th Author's Name Minoru Okada  
6th Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Speaker Author-1 
Date Time 2025-11-12 10:20:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2025-151, RCS2025-148 
Volume (vol) vol.125 
Number (no) no.241(AP), no.242(RCS) 
Page pp.7-12 
#Pages 6 
Date of Issue 2025-11-05 (AP, RCS) 

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