STUDY ON SHIELDING EFFECTIVENESS OF METALLIC CAVITIES WITH APERTURES BY COMBINING PARALLEL FDTD METHOD WITH WINDOWING TECHNIQUE

A novel hybrid method combining 3D Parallel Finite- Difference Time-Domain (FDTD) method with Windowing technique through a new Controlling factor to study the Shielding Effectiveness (SE) of metallic cavities with apertures is firstly presented in this paper. The simulating time when the sampling electric field in cavity converges can be reduced greatly by the MPI-based Parallel FDTD method with the optimum virtual topology for the scattering problem. And then the sampling electric field in cavity is dealt with Windowing technique,which can further reduce the total time steps that Parallel FDTD method needs. The numerical results show that combination of Parallel FDTD with Windowing technique can enhance the simulating efficiency greatly. Finally,the SE of metallic cavities with different configurations is studied by the hybrid method and some useful conclusions to the practical electromagnetic shielding problems are obtained.