A New Super-Resolution Method at Subarray Level in Planar Phased Array for Coherent Source

2-D super-resolution methods at subarray level possess important significance for multi-function phased array radar.The WSF method at subarray level suitable for coherent source is presented.The application of simplified array manifolds is a quite effective approach to reduce calibration cost and expense of phased array.Therefore,weighting network at subarray level is introduced so that simplified array manifold based on approximate Gaussian patterns is constructed,thereby the flexibility of super-resolution direction finding is improved greatly.This method overcomes the disadvantage of the method based on direct simplified array manifold whose available direction finding area can't be changed and the sidelobe sources can't be suppressed completely.Compared with the simplified array manifold based on the Gaussian patterns,cost and complexity of calculation is reduced remarkably and the direction finding performance is basically not degraded at the same time.Simulation results demonstrate the validity of the proposed method.