Parallel FDTD computation of scattering by buried objects

A simple approach of paralleling finite-difference time-domain (FDTD) algorithm is proposed for scattering by buried objects in this paper. The special problems in the parallel approach are discussed in detail, which are the handling skill of incident source in the half space and the load balancing issues. The programming skill and numerical experiments of the proposed approach are carried out in the high performance computing platform CEMS-Liuhui at the Center for Electromagnetic Simulation (CEMS), Beijing Institute of Technology (BIT). The accuracy and parallel efficiency of the approach are shown by the numerical results. The paralleling efficiency is greater than 80% at using 14 processors. The radar cross sections (RCS) of buried objects with large electrical size are investigated using the developed parallel program, which is difficult to be carried out using the previous sequential FDTD program.