Title :
A phased array calibration technique using eigenstructure methods
Author :
Brown, G. ; McClellan, J. ; Holder, E.
Author_Institution :
Georgia Tech. Res. Inst., Atlanta, GA, USA
Abstract :
An eigenstructure-based method for direction finding in the presence of angularly dependent sensor phase and gain perturbations is presented. One application for this technique is the calibration of a radar array degraded by mutual coupling effects. The method simultaneously computes an estimate of the angle of arrival of a single source and calibrates the array for that specific angle. A calibration curve for a range of angles is derived by using polynomial interpolation to fit a small set of measured calibration points. Since the technique is a variation of the MUSIC processor for angle estimation, it is applicable to both uniform and nonuniform linear array configurations
Keywords :
antenna phased arrays; calibration; eigenvalues and eigenfunctions; radar antennas; radio direction-finding; MUSIC processor; angle of arrival; angularly dependent sensor; direction finding; eigenstructure methods; gain perturbations; nonuniform linear array; phase perturbations; phased array calibration technique; polynomial interpolation; radar array; uniform linear array; Calibration; Computer errors; Degradation; Multiple signal classification; Mutual coupling; Phased arrays; Polynomials; Radar applications; Sensor arrays; Sensor phenomena and characterization;
Conference_Titel :
Radar Conference, 1990., Record of the IEEE 1990 International
Conference_Location :
Arlington, VA
DOI :
10.1109/RADAR.1990.201182
