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Paper Abstract and Keywords
Presentation 2022-02-18 14:55
On Array Antenna Gain in Closely-Spaced Arrangement
Yoshio Karasawa AP2021-177
Abstract (in Japanese) (See Japanese page) 
(in English) Theoretically, the gain of the array antenna fed in-phase by the omnidirectional antenna elements will approach 1 as the element spacing is narrowed toward 0. On the other hand, as a transmitting antenna, if there is no coupling effect between elements, it seems that the gain does not change by the spacing, but that violates the energy conservation law. In the first half of this report, we discuss this point and state that the idea of array factor seems to be applicable even in the case of narrow spacing. In the latter half of this report, we will evaluate the maximum gain of the array antenna based on the weight optimization. The scheme controlling the feed weight to obtain the maximum gain has already been established as a theory, but the evaluation by a simple calculation formula was limited to the omnidirectional array. In this report, a simple calculation formula for the dipole array is also shown, and the difference in gain characteristics is clarified.
Keyword (in Japanese) (See Japanese page) 
(in English) array antenna / antenna gain / closely-spaced arrangement / maximum gain / eigenvalue program / end-fire array / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 370, AP2021-177, pp. 104-109, Feb. 2022.
Paper # AP2021-177 
Date of Issue 2022-02-10 (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 AP2021-177

Conference Information
Committee AP  
Conference Date 2022-02-17 - 2022-02-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Industrial Session, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2022-02-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On Array Antenna Gain in Closely-Spaced Arrangement 
Sub Title (in English)  
Keyword(1) array antenna  
Keyword(2) antenna gain  
Keyword(3) closely-spaced arrangement  
Keyword(4) maximum gain  
Keyword(5) eigenvalue program  
Keyword(6) end-fire array  
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Keyword(8)  
1st Author's Name Yoshio Karasawa  
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Speaker Author-1 
Date Time 2022-02-18 14:55:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2021-177 
Volume (vol) vol.121 
Number (no) no.370 
Page pp.104-109 
#Pages 6 
Date of Issue 2022-02-10 (AP) 

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