Papers › Theory and Computation of Substructure Characteristic Modes
Theory and Computation of Substructure Characteristic Modes
Mats Gustafsson, Lukas Jelinek, Miloslav Capek, Johan Lundgren, Kurt Schab
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The problem of substructure characteristic modes is developed using a scattering matrix-based formulation, generalizing subregion characteristic mode decomposition to arbitrary computational tools. It is shown that the modes of the scattering formulation are identical to the modes of the classical formulation based on the background Green's function for lossless systems under conditions where both formulations can be applied. The scattering formulation, however, opens a variety of new subregion scenarios unavailable within previous formulations, including cases with lumped or wave ports or subregions in circuits. Thanks to its scattering nature, the formulation is solver-agnostic with the possibility to utilize an arbitrary full-wave method.
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