A FAST FULL-WAVE ANALYSIS OF SCATTERING AND RADIATION FROM LARGE FINITE ARRAYS OF MICROSTRIP ANTENNAS

A fast full-wave analysis technique that can be used to analyze the sc attering and radiation from large finite arrays of microstrip antennas is presented. The technique discretizes the mixed potential integral equation (MPIE) in the spatial domain by means of a full-wave discrete complex image method. The del operators on the Green's functions are transferred from the singular kernel to the expansion and testing func tions. The resultant system of equations is solved using the biconjuga te gradient (BCG) method in which the matrix-vector product is evaluat ed efficiently using fast Fourier transform (FFT). This results in an efficient and accurate computation of the scattering and radiation fro m finite arrays of microstrip antennas. Several numerical results are presented, demonstrating the accuracy, efficiency, and capability of t his technique.