ELECTROMAGNETIC DYADIC GREENS-FUNCTION IN CYLINDRICALLY MULTILAYERED MEDIA

A spectral-domain dyadic Green's function for electromagnetic fields i n cylindrically multilayered media with circular cross section is deri ved in terms of matrices of the cylindrical vector wave functions. Som e useful concepts, such as the effective plane wave reflection and tra nsmission coefficients, are extended in the present spectral domain ei genfunction expansion, The coupling coefficient matrices of the scatte ring dyadic Green's functions are given by applying the principle of s cattering superposition, The general solution has been applied to the case of axial symmetry (n=0, n is eigenvalue parameter in <(phi)over t ilde> direction) where the scattering coefficients are decoupled betwe en TM and TE waves, Two specific geometries, i.e., two- and three-laye red media that are frequently employed to model the practical problems are considered in detail, and the coupling coefficient matrices of th eir dyadic Green's functions are given, respectively.