Simulation Analysis Of Band-stop Frequency Selective Surfaces

Frequency selective surfaces, is a two-dimensional periodic array structure which can be used to the electromagnetic wave frequency selection, so it is often used as a spatial filter. FSS has a wide range of applications in the electromagnetic field. It covers a large part of the electromagnetic spectrum, including microwave, millimeter wave, even to the infrared band. At present, frequency selective surface technology has been widely applied to military, civilian aspects.Since the nineteen-sixties, many western countries started to the extensive research on FSS. Due to a late start, our research on FSS had not formed a relatively systematic theory system yet, and the study is still confined to the two layers or three layers. There is a big gap between our country and the developed countries in terms of application.There are a lot of frequency selective surface analysis methods, such as finite difference time domain method, moment method, and the finite element method. This paper selects the spectrum Galerkin method, which has a smaller amount of calculation and more precise simulation result. This method can simulate various shapes of FSS unit with all kinds of medium.In this paper, we analyzed the frequency selective surfaces of various factors affect by simulation method. We analyzed unit structure, unit spacing, incident angle, medium loading etc. We analyzed circular unit, square ring, Y shape, Jerusalem cross band-stop unit. The results agree well with the relevant information.This paper presents a complementary Jerusalem cross array which is composed of two layers of band-pass FSS unit, a band stop FSS unit and4layers of medium. In the TM mode and when the incident angle is in the0-60degrees, the array has a very broad pass-band bandwidth. But in the TE mode, effect is poor. The FSS researchers can refer to this model.