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Paper Abstract and Keywords
Presentation 2020-09-25 13:30
Miniaturization of a 256 × 256 Large-Scale MIMO Antenna
Koichi Ogawa (Toyama Univ.) AP2020-67
Abstract (in Japanese) (See Japanese page) 
(in English) Previously, we have presented a 256 × 256 large-scale MIMO antenna that achieves an over-100 Gbps channel capacity over the full-azimuth coverage. This antenna comprises four sets of 64 × 64 MIMO antennas squarely arranging in a two-dimensional manner, resulting in some drawbacks from the viewpoint of practical applications due to a large occupied space. In another R&D activity, on the other hand, the authors have examined a method of achieving a small-sized 128×128 MIMO array by means of the double-ring structure of 64 × 64 MIMO arrays, successfully attaining a 85 %-channel capacity of a non-miniaturized 128×128 MIMO array. By utilizing all of the R&D resources that the authors have accumulated so far, the prime objective of this paper is to achieve a considerable reduction in the occupied space when a 256 × 256 large-scale MIMO antenna is used in a realistic use scenario, for instance, when it is mounted on a roof of a car. A particular emphasis is placed on gaining a good knowledge about the design method of a large-scale MIMO antenna by comparing its performance in two and three-dimensional configurations. Further, a novel approach that can provide a low correlation between subchannels is presented, from which we discuss the procedure for carrying out the miniaturization of large-scale MIMO arrays, aiming at accomplishing several hundreds of gigabits capacity in any direction in azimuth for the forthcoming 6G mobile communications.
Keyword (in Japanese) (See Japanese page) 
(in English) Large-scale MIMO antenna / Miniaturization / Double-ring structure / EM coupling / Correlation / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 171, AP2020-67, pp. 162-167, Sept. 2020.
Paper # AP2020-67 
Date of Issue 2020-09-17 (AP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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)
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Conference Information
Committee MW AP  
Conference Date 2020-09-24 - 2020-09-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, Millimeter wave, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2020-09-MW-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Miniaturization of a 256 × 256 Large-Scale MIMO Antenna 
Sub Title (in English)  
Keyword(1) Large-scale MIMO antenna  
Keyword(2) Miniaturization  
Keyword(3) Double-ring structure  
Keyword(4) EM coupling  
Keyword(5) Correlation  
1st Author's Name Koichi Ogawa  
1st Author's Affiliation Toyama University (Toyama Univ.)
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Date Time 2020-09-25 13:30:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2020-67 
Volume (vol) IEICE-120 
Number (no) no.171 
Page pp.162-167 
#Pages IEICE-6 
Date of Issue IEICE-AP-2020-09-17 

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