Abstract:

In order to calibrate array antennas mutual coupling errors and improve the performance of direction of finding direction of arrival (DOA) algorithm, a new selfcalibration method is presented. Firstly, using the structural characteristics of the mutual coupling matrix, researching each coefficient, the array flow is transformed. Then objective function is constructed, and the mutual coupling matrix can be gotten by solving the objective function under linear constrained. At last, the DOA of incident signal and array mutual coupling matrix are obtained by utilizing peak searching technology. There is no need to do multidimensional iteration calculation, the accuracy of mutual coupling matrix and DOA estimation is higher, the performances of the method are confirmed by computer simulations and actual direction finding system experiments.