A GENERAL EXPRESSION OF DYADIC GREENS-FUNCTIONS IN RADIALLY MULTILAYERED CHIRAL MEDIA

A general expression of spectral-domain dyadic Green's function (DGF) is presented in this paper for defining the electromagnetic radiation fields in spherically arbitrary multilayered and chiral media, Without any loss of the generality, each of the radial multilayers could be t he chiral layer with different permittivity, permeability, and chirali ty admittance, while both distribution and location of current sources are assumed to be arbitrary, The DGF is composed of the unbounded DGF and the scattering DGF, based on the method of scattering superpositi on, The scattering DGF in each layer is constructed in terms of the mo dified and normalized spherical vector wave functions, The coefficient s of the scattering DGF's are derived and expressed in terms of the eq uivalent reflection and transmission coefficients, by applying boundar y conditions satisfied by the coefficient matrices.