Evaluations for Estimation Method of the Distributed Array Antenna (DAA) Radiation Pattern by Experimental Analysis

Daisuke GOTO  Fumihiro YAMASHITA  Kouhei SUZAKI  Hideya SO  Yoshinori SUZUKI  Kiyoshi KOBAYASHI  Naoki KITA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E101-B   No.6   pp.1494-1502
Publication Date: 2018/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017EBP3154
Type of Manuscript: PAPER
Category: Satellite Communications
Keyword: 
the distributed array antenna (DAA),  array pattern,  array factor,  antenna pattern estimation,  antenna pattern measurement,  

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Summary: 
We target the estimation of antenna patterns of distributed array antenna (DAA) systems for satellite communications. Measuring DAA patterns is very difficult because of the large antenna separations involved, more than several tens of wavelengths. Our goal is to elucidate the accuracy of the DAA pattern estimation method whose inputs are actual antenna pattern data and array factors by evaluating their similarity to actually measured DAA radiation patterns. Experiments on two Ku band parabolic antennas show that their patterns can be accurately estimated even if we change the conditions such as frequency, antenna arrangement and polarization. Evaluations reveal that the method has high estimation accuracy since its errors are better than 1dB. We conclude the method is useful for the accurate estimation of DAA patterns.