Analysis of multiresonant frequency selective surfaces

A dyadic Green´s function methodology is used to analyze periodic structures with open or short circuited square rings as elements. The possibility of using this geometry for multiband operation is investigated. The reflection and transmission coefficients of both short and open circuited square rings of conducting patches for both free-standing and dielectric-supported cases are computed. The periodicity of the structure makes it possible to satisfy the boundary conditions by imposing then only on a single selected path. This has been done, and the method of moments is utilized to solve the resulting integral equations numerically. Specifically, the Galerkin method along with triangular basis functions is used to model the current distribution on the conducting patches.<>