Efficient Modeling of Two-Dimensional Infinite Periodic Structures and Its Application to Method of Moments

A novel modeling method of two-dimensional infinite periodic structures is introduced, and they are modeled as infinite surfaces whose reflection coefficients are numerically known. In the similar manner as a layered media Green’s function (LMGF), a reduced form of Green’s function for the two-dimensional infinite periodic structures is obtained. Self/mutual coupling between source and observation point is formulated via method of moments (MoM). Numerical simulation of an antenna over frequency selective surfaces (FSSs) is performed, and it is found that the proposed modeling method works well for including contribution of the FSSs to the numerical results.