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Paper Abstract and Keywords
Presentation 2017-11-10 13:45
Improvement of Mode Uniqueness for OAM Communication Using a Loop Array by Reflector Plane
Ryohei Yamagishi, Hiroto Otuka, Akira Saitou, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2017-138
Abstract (in Japanese) (See Japanese page) 
(in English) Mode uniqueness in an orbital-angular-momentum (OAM) communication method is improved to obtain excellent performance at the 5-GHz band. The uniqueness of the mode is shown by analysis and numerical calculation to be improved by combining loop antennas and a reflector. With 4-element loop antenna arrays, the current isolation ,which is the index for the mode uniqueness is 18.4 dB, 27.9 dB, and 41.0 dB for distances of 10 mm, 5 mm, and 2 mm between the reflector and the array, respectively. With the arrays designed for the distance of 5 mm, 4-value multiplexing characteristics for short-range (30 mm) communication were estimated. The simulated and measured transmission isolations are more than 23.6 dB and 19.2 dB, respectively. The measured transmission isolation is improved by 7.2 dB compared with the array without the reflector [4]. For long-range (1 m) communication with paraboloids antenna and the array, the simulated transmission isolation is as large as 30.4 dB, which shows that the improvement of the current isolation by the reflector is also very effective for the long-range OAM communication.
Keyword (in Japanese) (See Japanese page) 
(in English) Loop antenna / Orbital angular momentum / Multiplexing / generalized Z-matrix / reflector plane / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 291, MW2017-138, pp. 145-149, Nov. 2017.
Paper # MW2017-138 
Date of Issue 2017-11-02 (MW) 
ISSN Print edition: ISSN 0913-5685    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 MW2017-138

Conference Information
Committee MW  
Conference Date 2017-11-09 - 2017-11-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Miyakojima Marin Terminal Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2017-11-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of Mode Uniqueness for OAM Communication Using a Loop Array by Reflector Plane 
Sub Title (in English)  
Keyword(1) Loop antenna  
Keyword(2) Orbital angular momentum  
Keyword(3) Multiplexing  
Keyword(4) generalized Z-matrix  
Keyword(5) reflector plane  
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Keyword(7)  
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1st Author's Name Ryohei Yamagishi  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Hiroto Otuka  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Akira Saitou  
3rd Author's Affiliation The University of Electro-Communications (UEC)
4th Author's Name Ryo Ishikawa  
4th Author's Affiliation The University of Electro-Communications (UEC)
5th Author's Name Kazuhiko Honjo  
5th Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2017-11-10 13:45:00 
Presentation Time 15 minutes 
Registration for MW 
Paper # MW2017-138 
Volume (vol) vol.117 
Number (no) no.291 
Page pp.145-149 
#Pages 5 
Date of Issue 2017-11-02 (MW) 

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