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Paper Abstract and Keywords
Presentation 2024-03-15 10:00
RePH: Reconfigurable-Intelligent-Surface-Based Electronic Phantom -- Study on MIMO Radar Channel Reconstruction Using Independent Amplitude/Phase Control Variable Load Circuit --
Chihiro Segawa, Kentaro Murata, Naoki Honma (Iwate Univ.) AP2023-211
Abstract (in Japanese) (See Japanese page) 
(in English) We proposed a reconfigurable-intelligent-surface (RIS)-based electronic phantom (RePH) for an over-the-air (OTA) testing system of multiple-input multiple-output (MIMO) radar. This method can reconstruct the MIMO radar channel, measured and recorded in advance, only controlling the variable load connecting the RIS array. In this paper, we propose the variable load circuit which can control the amplitude/phase of the reflection coefficient of the variable load independently by only controlling the phase of the variable phase shifter. The proposed circuit consists of variable phase shifters connected to the in-phase and quadrature ports of a 90-degree hybrid coupler, and this circuit is implemented on a flat surface to simplify the load. The reflection coefficient of the prototyped variable load circuit realized less than 0.80 value, and this circuit can control the load only -1.5 dB loss and 0◦ ∼ 360◦ of phase. The accuracy of channel reconstruction using the proposed variable load is comparable to the case of using an ideal load which controls the amplitude and phase of the reflection coefficients continuously.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / radar / reconfigurable intelligent surface / phantom / variable phase shifter / variable load circuit / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 441, AP2023-211, pp. 57-62, March 2024.
Paper # AP2023-211 
Date of Issue 2024-03-07 (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 AP2023-211

Conference Information
Committee AP  
Conference Date 2024-03-14 - 2024-03-15 
Place (in Japanese) (See Japanese page) 
Place (in English) UNIVERSITY OF FUKUI 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2024-03-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) RePH: Reconfigurable-Intelligent-Surface-Based Electronic Phantom 
Sub Title (in English) Study on MIMO Radar Channel Reconstruction Using Independent Amplitude/Phase Control Variable Load Circuit 
Keyword(1) MIMO  
Keyword(2) radar  
Keyword(3) reconfigurable intelligent surface  
Keyword(4) phantom  
Keyword(5) variable phase shifter  
Keyword(6) variable load circuit  
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Keyword(8)  
1st Author's Name Chihiro Segawa  
1st Author's Affiliation Iwate University (Iwate Univ.)
2nd Author's Name Kentaro Murata  
2nd Author's Affiliation Iwate University (Iwate Univ.)
3rd Author's Name Naoki Honma  
3rd Author's Affiliation Iwate University (Iwate Univ.)
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Speaker Author-1 
Date Time 2024-03-15 10:00:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2023-211 
Volume (vol) vol.123 
Number (no) no.441 
Page pp.57-62 
#Pages 6 
Date of Issue 2024-03-07 (AP) 

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