Finite Array Of Scattering Analysis Method

Analysis of finite array structure plays an important role in the design of array antenna and frequency selective surface. In this article, method of moment (MoM) and Floquet mode (FM) method will be applied to analysis the radiation and scattering of planar array and curved array. As one part of the work, the induced current on perfect conductor surface is computed with MoM method and graphed by Origin. The factors, such as choice of basis function and sliced mounts of one cell, which affect solution accuracy are summarized. All of these provide a good basis for the latter computation of array scattering field. Then the scattering field of planar array and curved array are given. The size and the placement of cells and the incidence angle etc. are studied to find out how these factors affect the array scattering field. The second part of the work is to analyze the finite array with Floquet mode method. The scattering field of two-dimension array is computed and the characteristic of FM is mentioned. At the end of the work, the two methods, FM and MoM, are discussed respectively.