有限大曲面频率选择表面的建模

Modeling of Frequency Selective Surfaces for Finite Curved Surfaces

为了有效运用时域有限差分(Finite-Difference Time-Domain,FDTD)等数值算法来分析有限大曲面频率选择表面(Frequency Selective Surface,FSS)的散射特性,提出了一种FSS的三维建模方法,包括圆柱表面、圆锥表面以及球表面的不同FSS单元的建模。首先阐述了在曲面上进行FSS建模的思路,其次给出了双方环FSS在圆柱表面的网格剖分图,矩形贴片FSS阵列在圆锥表面的建模结果以及十字形FSS在球表面的建模结果。这些建模结果对于采用FDTD、MRTD等算法进行有关FSS的RCS减缩实例的电磁分析具有重要意义。

In order to analyze the scattering properties of the Frequency Selective Surfaces（FSS） for finite curved surfaces using the FDTD algorithm,we propose a 3-D modeling way for FSS on curved surfaces,including different FSS elements on cylindrical,conical and spherical surfaces respectively.In this paper,first,how to modeling FSS on curved surfaces is illustrated.After that modeling results of double square loop（DSL） FSS on a cylindrical surface,dipole array on a conical surface and cross FSS on a spherical surface are presented respectively.This is a high priority for the RCS analysis of FSS applications using electromagnetic algorithms such as FDTD and MRTD.