Investigation of the effect of conductor loss and mismatch on the tunneling through frequency selective surfaces

The paper deals with the tunneling effect through stacked frequency selective surfaces (FSSs). The analysis is based on a Galerkin moment method in which basis functions are entire domain. The method can take conductor losses into account. It is shown how the conductor loss can affect the tunneled field. Moreover, multiple reflection of the fundamental mode due to mismatches of the successive FSSs is investigated. It is shown that after considering both losses and mismatches, there is an optimum number of layers for achieving a maximum intensity of the tunneled field.