Hybrid method based on the use of GSM formalism with complex source point beams for the analysis of complex antenna problems

An hybrid technique based on the use of complex sources is presented for the electromagnetic analysis of complex antenna and/or scattering problems. The analysis domain is decomposed into separate subdomains, which are independently studied through the most appropriate technique and characterized by a generalized scattering matrix (GSM), where the ports are associated with complex point source (CPS) beams. Finally, the interactions among the subdomains are described by imposing the proper subdomain connections, and a linear system involving all the GSMs is constructed. Thanks to the angular selectivity of the CPS beams, only a small fraction of the beams are involved in the final system, thus, leading to an efficient numerical procedure.