A general domain decomposition scheme based on the use\udof complex sources is presented for the electromagnetic analysis of\udcomplex antenna and/or scattering problems. The analysis domain is\uddecomposed into separate subdomains whose interactions are described\udthrough a network formalism, where the ports are associated with\udcomplex point source (CPS) beams radially emerging from the\udsubdomain boundaries. Each obstacle is independently analyzed with\udthe most appropriate technique and described through a generalized\udscattering matrix (GSM). Finally, a linear system is constructed, where\udthe excitation vector is given by the complex source expansion of the\udprimary sources. Thanks to the angular selectivity of the CPS beams,\udthe subdomain interactions only involve a small fraction of the beams;\udthus, yielding sparse moderate size linear systems. Due to the reusability\udof the GSMs, the proposed approach is particularly efficient\udin the context of parametric studies or antenna installation problems.\udNumerical examples are provided to demonstrate the efficiency and the\udaccuracy of the proposed strategy.
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