A numerical model for multilayered microstrip phased array antennas

We propose a new numerical model for multilayered microstrip phased array antennas. In the proposed approach, each layer is considered as a module, characterized by its generalized scattering matrix (GSM). The GSM, of a module contains the information about the reflection and transmission behavior with respect to various Floquet modes, supported by the phased array structure. The GSMs of all possible modules are computed and the overall GSM of the structure is obtained by combining them together appropriately. In order to obtain the individual GSM of a module, the Galerkin method of moment is used. There are several advantages of this model as compared to the conventional spectral Galerkin model. Some of the advantages are listed.