DYADIC GREENS-FUNCTIONS IN ARBITRARY MULTILAYERED SPHERICAL CHIRAL MEDIA AND ITS APPLICATIONS

An exact formulation of the dyadic Green's function in terms of new sp herical vector wave functions for the electromagnetic sources placed i nside of a radially multilayered sphere of reciprocal and nonreciproca l chiral media is presented according to the method of scattering supe rposition, and the general formulas for the determining the focal poin ts of spherical chirolens are derived using the approximation of imped ance matching and geometrical optics. Furthermore, we investigate the electromagnetic responses of inhomogeneous spherical chirolens antenna characterized by different constitutive parameters, and the effects o f impedance matching as well as chirality admittance on the radiation patterns are examined in detail.