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Fast analysis of stop-band FSS integrated with phased array antennas

This paper presents a method for the efficient analysis of multilayer frequency selective surfaces (FSSs) integrated with phased array of open-ended waveguides. The method is based on the assumption that all the periodic surfaces are arranged on the same spatial lattice (of arbitrary shape). The whole structure is represented as an equivalent multi-mode transmission line network, where each interface is characterized by an equivalent immittance matrix, computed through a full-wave analysis. To reduce the computational effort of the analysis a fast adaptive model-based interpolation algorithm for the scattering matrix entries is included. A software has been developed, which will provide an useful tool for the design of integrated FSS for phased array antennas.