Analysis of frequency selective surfaces using alternating-direction-implicit spectral finite-difference time-domain method

In this paper, the frequency selective surfaces (FSS) are analyzed by using alternating-direction-implicit (ADI) spectral finite-difference time-domain (SFDTD) method. This method not only solves the oblique incidence on FSS structures, but also overcomes the restriction of the Courant Friedrich Levy (CFL) stability condition. Two examples are provided. The results are compared with those obtained by using SFDTD method.