A Three-Dimensional HIE-PSTD Scheme for Simulation of Thin Slots

In this paper, a pseudospectral (PS) scheme is introduced into the hybrid implicit-explicit finite-difference time-domain (HIE-FDTD) method for solving the shielding effectiveness (SE) of thin slots. The maximum time-step size in this method is only determined by two spatial discretizations and the spatial discretization only needs two cells per wavelength. The 3-D formula of the method is presented and the time stability condition of the method is demonstrated. When this method is applied to simulate thin slots, high computational efficiency is obtained and less computer memory is used, which is demonstrated through numerical examples by comparing with the finite-difference time-domain (FDTD) method, HIE-FDTD method, and alternating-direction implicit (ADI)-FDTD method.