Abstract: The Time Domain Physical Optics (TDPO) approach is developed for the analysis of transient scattering by electrically large PEC objects. The development is based on the inverse Fourier transformation of the frequency domain physical optical expression. The estimation of required computer memory is discussed. Too much time and prohibitive computation resources are needed for the analysis of electromagnetic characteristics of electrically ultra-large objects. To overcome this drawback, a parallel algorithm that combines TDPO and MPI function is presented. Numerical results show that the speed-up ratio is approximately equal to N, where N is the number of processors, illustrating the high efficiency and good performance of the parallel TDPO.

Key words: time domain physical optics, parallel algorithm, electrically ultra-large objects, electromagnetic scattering