Electromagnetic modeling for FSS with anisotropic substrate by using a hybrid-accelerated VSIE method

摘要

An efficient and simple-to-implement volume surface integral equation method is presented to simulate electromagnetic properties of periodic structures involving anisotropic media. The algorithm starts with the periodic Green's function, thus only a unit cell of the object is needed to be calculated. Moreover, the Ewald method is used to expedite the computation of the near region while the linear interpolation is implemented to expedite the computation of the far region. In this manner, the matrix filling time can be saved significantly. The study on the reflection characteristics of several frequency selective surfaces with anisotropic dielectric substrate is presented to demonstrate the accuracy, efficiency and flexibility of the proposed method. And the anisotropic effect of dielectric substrate is also studied through a FSS with liquid crystal substrate.