GREEN DYADICS IN UNIAXIAL BIANISOTROPIC-FERRITE MEDIUM BY CYLINDRICALVECTOR WAVE-FUNCTIONS

The uniaxial bianisotropic-ferrite medium, which can be fabricated by polymer synthesis techniques, is a generalization of the well-studied chiral medium. it has potential applications in the design of antirefl ection coating, antenna radomes, and novel microwave components. In th e present investigation, based on the concept of spectral eigenwaves, eigenfunction expansion of the Green dyadics in this class of material s is formulated in terms of the cylindrical vector wavefunctions. The formulations are greatly simplified by analytically evaluating the int egrals with respect to the spectral longitudinal and radial wavenumber s, respectively. The analysis indicates that the solutions of the sour ce-incorporated Maxwell's equations for a homogeneous uniaxial bianiso tropic-ferrite medium are composed of two (or four) eigenwaves travell ing with different wavenumbers. Each of these eigenwaves is a superpos ition of two transverse waves and a longitudinal wave. The Green dyadi cs of planarly and cylindrically multilayered structures consisting of uniaxial bianisotropic-ferrite media can be straightforwardly obtaine d by applying the method of scattering superposition and appropriate e lectromagnetic boundary conditions respectively. The resulting formula tions, which can be theoretically verified by comparing their special forms with existing results, provide fundamental basis to analyse the physical phenomena of unbounded and multilayered uniaxial bianisotropi c-ferrite media.