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Paper Abstract and Keywords
Presentation 2007-09-06 13:00
Circularly Polarized Parasitic Array Radiator Antenna Using Microstrip Antennas with Dual-orthogonal Feeds
Amane Miura, Wuqiong Luo, Makoto Taromaru, Masazumi Ueba (ATR) AP2007-80
Abstract (in Japanese) (See Japanese page) 
(in English) Most of conventional parasitic array radiator antennas with reactive loads including ESPAR (Electronically Steerable Parasitic Array Radiator) antenna and microstrip array antenna are linearly polarized. On the other hand, circularly polarized (CP) antennas are required for the wireless communications system operated in CP. This paper describes the hardware development and the experimental verification of a parasitic microstrip array radiator antenna operated in CP. This antenna applies a microstrip antenna with dual-orthogonal feed as an antenna element for excitation of the CP wave from both fed and parasitic elements. A new switched reactance circuit using an SP3T switch taking three reactance states is connected to two ports on each parasitic element. The radiation pattern is controlled by switching the reactance state. The measured radiation patterns and the axial ratios for two-element and five-element array with various reactance states are shown with the calculated ones to verify the capability of the antenna as beam-switching antenna operated in the CP wave.
Keyword (in Japanese) (See Japanese page) 
(in English) Array Antenna / Circular Polarization / Microstrip Antenna / Parasitic Element / Reactance / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 210, AP2007-80, pp. 37-42, Sept. 2007.
Paper # AP2007-80 
Date of Issue 2007-08-30 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee AP  
Conference Date 2007-09-06 - 2007-09-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) etc. 
Paper Information
Registration To AP 
Conference Code 2007-09-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Circularly Polarized Parasitic Array Radiator Antenna Using Microstrip Antennas with Dual-orthogonal Feeds 
Sub Title (in English)  
Keyword(1) Array Antenna  
Keyword(2) Circular Polarization  
Keyword(3) Microstrip Antenna  
Keyword(4) Parasitic Element  
Keyword(5) Reactance  
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1st Author's Name Amane Miura  
1st Author's Affiliation ATR (ATR)
2nd Author's Name Wuqiong Luo  
2nd Author's Affiliation ATR (ATR)
3rd Author's Name Makoto Taromaru  
3rd Author's Affiliation ATR (ATR)
4th Author's Name Masazumi Ueba  
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Speaker Author-1 
Date Time 2007-09-06 13:00:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2007-80 
Volume (vol) vol.107 
Number (no) no.210 
Page pp.37-42 
#Pages 6 
Date of Issue 2007-08-30 (AP) 

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