| The engineering application of frequency selective surface (FSS) is broad. Up to now, the investigation about FSS is mostly about infinite and planar- periodic array. But in practical applications, FSS is impossible infinite, and sometimes even curved. So the electromagnetic analysis on the finite FSS is valuable.The paper emphasize the research on the power-transmission characteristics of finite metallic FSS, find the method of defining the transmission coefficient and the reflection coefficient of finite FSS, and calculate the power-transmission coefficient and the reflection coefficient of finite FSS successfully. The FSS are illuminated by different incident waves. For example, plane wave, gauss wave, and so on. We also consider about the curved and double layered FSS to accord with practical condition. The numerically calculations are compared with the solutions by the analysis of the software which about infinite and periodic structure. Numerical results are given to demonstrate the accuracy and efficiency of the proposed method. For the sake of knowing the working mechanism of FSS more clearly, we present the chart of the current distribution on the surface of the FSS in this paper. For electric-large finite FSS, the Multilevel fast multipole algorithm (MLFMA) combined with electrical field integral equations (EFIE) is used to accelerate the matrix-vector multiply.In addition, we do some research on the electromagnetic calculation of finite metallic FSS and horn antenna as well as wire antennas as an integrated antenna system in this paper. The FSS arrays and antenna are modeled as an integrated antenna system and the power radiation of the antenna with FSS and without FSS are calculated. The frequency selective characteristic of FSS is maked out by way of observing the radiation pattern. |
