A simple technique to analysis of microwave absorbers using frequency selective surface

This work aims to analyze the variation of some parameters in the design of microwave absorbers using FSS. The methodology consists of a combination of two techniques: the equivalent circuit method, which provides the transmission and reflection characteristics of the individual structures for a plane wave with normal incidence, and the scattering matrix technique, which provides the result of two FSS cascaded, in the projected range. Simulated results are presented and comparison with results obtained with commercial software are made.