Application of precorrected-FFT method combined with GMRES-DR algorithm for the analysis of planar structure

An efficient algorithm combining the precorrected fast Fourier transform(P-FFT) method and the discrete complex-image method (DCIM) is presented in this paper for analyzing planar structure. The resultant system is solved by generalized minimum residual with deflating restarting (GMRES-DR) method. One typical microstrip antenna array is analyzed and the numerical results are presented to demonstrate the accuracy and efficiency of the proposed method