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Paper Abstract and Keywords
Presentation 2014-11-13 14:40
Restoring Directivity of Active array Antenna System in the case of Antenna Element Failure
Yukitaka Takahashi, Shohei Natori, Keisuke Sato, Ichiro Oshima (Denki Kogyo), Toru Kitayabu, Masayuki Nakano (KDDI R&D LABS) AP2014-143
Abstract (in Japanese) (See Japanese page) 
(in English) Active array Antenna System (AAS) is expected for base station antenna of mobile communication system. AAS has the phase-shifter and the amplifier in each antenna element, which allows it to work with variable antenna patterns. If one or some of antenna element does not operate, antenna pattern is broken. In that case, AAS can restore normal antenna pattern by controlling the phase-shifter and the amplifier in other antenna elements which operate normally. We have developed the AAS which has analog phase-shifters and variable attenuators in each antenna element. In this paper, we show it is possible to restore normal antenna pattern and to recover RSRP by measurement in field in the case of one or two antenna elements failure.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile communication system / Base station antenna / Active array antenna system / Restoring directivity / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 294, AP2014-143, pp. 81-86, Nov. 2014.
Paper # AP2014-143 
Date of Issue 2014-11-05 (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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF AP2014-143

Conference Information
Committee AP RCS  
Conference Date 2014-11-12 - 2014-11-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Yamagata University, Yonezawa Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antennas, Equalization, Interference Cancellation, MIMO, Wireless Communication Systems, etc. 
Paper Information
Registration To AP 
Conference Code 2014-11-AP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Restoring Directivity of Active array Antenna System in the case of Antenna Element Failure 
Sub Title (in English)  
Keyword(1) Mobile communication system  
Keyword(2) Base station antenna  
Keyword(3) Active array antenna system  
Keyword(4) Restoring directivity  
1st Author's Name Yukitaka Takahashi  
1st Author's Affiliation Denki Kogyo Co., Ltd. (Denki Kogyo)
2nd Author's Name Shohei Natori  
2nd Author's Affiliation Denki Kogyo Co., Ltd. (Denki Kogyo)
3rd Author's Name Keisuke Sato  
3rd Author's Affiliation Denki Kogyo Co., Ltd. (Denki Kogyo)
4th Author's Name Ichiro Oshima  
4th Author's Affiliation Denki Kogyo Co., Ltd. (Denki Kogyo)
5th Author's Name Toru Kitayabu  
5th Author's Affiliation KDDI R&D Labratories (KDDI R&D LABS)
6th Author's Name Masayuki Nakano  
6th Author's Affiliation KDDI R&D Labratories (KDDI R&D LABS)
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Date Time 2014-11-13 14:40:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2014-143 
Volume (vol) IEICE-114 
Number (no) no.294 
Page pp.81-86 
#Pages IEICE-6 
Date of Issue IEICE-AP-2014-11-05 

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