An Optimum Method of Thinned Linear Arrays Based on Iterative FFT Algorithm

An optimum method based on iterative FFT algorithm for thinned linear arrays featuring an optimal peak side-lobe level is presented and the detailed steps of the method are discussed.An optimal elements distribution can be obtained when each iteration loop starts with a different random initialization of element excitations by using the fourier transform relationship exists between the array factor and the element excitations.Array thinning is accomplished by setting the amplitudes of the largest element excitations to unity and the others to zero during each iteration cycle.Finally,the analysis of the simulated results confirm the quickness,the effectiveness and the robustness of the method.