Simulation Analysis of Ansys HFSS and CST Microwave Studio for Frequency Selective Surface

In this paper, the simulations of Ansys HFSS and CST Microwave Studio for frequency selective surface (FSS) are discussed. The definitions of the Floquet modes, mesh density, and the distance between Floquet port and FSS surface affects the accuracy of the corresponding transmission coefficients. According to the example of a typical biplanar symmetric hybrid radome, the efficient simulation conditions of the two softwares for FSS are summarized.