A new numerical scheme to obtain the RCS of three-dimension bodies using PSTD algorithm

A new numerical method, the pseudospectral time domain (PSTD) algorithm with an infinite order of accuracy and high efficiency, is used to obtain the RCS of a three-dimensional object. In implementation of the PSTD, the incident plane wave pulse is simulated with an initial-condition excitation technique based on a pair of one-dimensional PSTD update equations to eliminate the unwanted Gibbs phenomenon. The pure scattered field formulation is utilized to surmount the difficulty of introducing the incident field into computational space. A PSTD near-to-far zone field transform is developed for the analysis of RCS. Numerical results presented in this work confirm the efficacy of the PSTD method.