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Abstract
Based on a spectral domain technique, asymptotic expressions for Green's functions in infinitely extended bianisotropic media are determined. This is achieved by considering the spectral representation of the Green's dyadic, which can be represented as a rational function in the spectral variables. Extraction of pole singularities and the spectral behavior at infinity leads to the far field-and the source point asymptotics in the spatial domain, respectively. The extraction procedure and its peculiarities are discussed and explicit formulas and sample results for diagonally bianisotropic media show the applicability of the approach.