Abstract:
Numerical simulation of real military objects' electromagnetic scattering at high frequency bands is ordinary corresponding to the electromagnetic field calculation for electrically large objects. This simulation can be computationally expensive with large storage and calculation works when high precision numerical algorithm is used. To ensure high computational precision, we programed a finite volume time domain (FVTD) solver pmbRCS3d based on body-fitted multi-blocks grids, which computes the Maxwell equations of electromagnetism directly. In order to handle the massive calculation work due to huge number of grids, a parallel MPI programing technique was used together with careful design of the grid partition, load balance, data communication, and parallelization. The pmbRCS3d software was applied successfully to calculate the electromagnetic scattering field and the bi-station RCS of an L-band electrically large flying-wing shape. The results show that the developed pmbRCS3d software has stable and robust characteristic and can be used for the RCS calculation of higher frequency band objects.