Summary
International Symposium on Antennas and Propagation
2009
Session Number:1A1
Session:
Number:1A1-5
Experimental Evaluation of Linear Array Calibration by using 2-D Virtual Array
Hiroshi SAKAI, Hiroyoshi YAMADA, Yoshio YAMAGUCHI,
pp.17-20
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
In recent years. high-resolution Direction-of-Arrival(DOA)estimation techniques with an array an- tenna such as the MUSIC [1] have been applied in various fields. There are a lot of error factors when array antenna is used for the DOA estimation. DOA estimation accuracy deteriorates significantly due to the errors in actual measurements. When reference data for calibration are obtained in advance. the error factors can be estimated. For azimuth only DOA estimation, a uniform linear array is often em- ployed. However, when elevation angle dependency for DOA estimation exists in the array. the DOA estimation performance of azimuth angle also deteriorates in general. To calibrate this error, we intro- duce additive virtual elements to the linear array forming a virtual rectangular array. and propose a 2-D calibration technique with the virtual array. In this report, we show the availability of the proposed 2- dimensional calibration by the virtual array. and make a comparative analysis of calibration accuracy on the conventional and the proposed calibration method, respectively, by experiment.