Mutual Coupling Characteristics of Choke Loaded Patch Array Antenna

Naobumi MICHISHITA  Hiroyuki ARAI  Yasuko KIMURA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.1   pp.411-415
Publication Date: 2005/01/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.1.411
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
Keyword: 
mutual coupling,  patch array antenna,  choke,  front to back ratio,  side lobe level,  repeater,  

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Summary: 
This paper describes the choke-loaded patch array antenna for use in the IMT-2000 repeater systems. The choke structure of the 4-element array is designed by means of an electromagnetic analysis. A high front-to-back (FB) ratio is required for suppressing mutual coupling in order to stop the oscillation caused by the interference waves between a transmitting and receiving antenna. The suppression of the FB ratio by a choke is limited in the case of the 16-element array because its side lobe level is large. In this paper, we examine the effect of suppressing the mutual coupling using a binomial array.