Input impedance of a probe-excited semi-infinite rectangular waveguide with arbitrary multilayered loads: part I - dyadic Green's functions

Abstract

This paper presents both the electric and the magnetic types of dyadic Green's functions defined for electromagnetic fields due to electric and magnetic current sources in a semi-infinite rectangular waveguide filled with arbitrary multi-layered media. Applying the principle of scattering superposition, the dyadic Green's functions in each of the multiple loads are constructed in general for such EM current sources located in an arbitrary layer of the waveguide. Analytical expressions of the scattering dyadic Green's functions coefficients are obtained in terms of transmission matrices. A semi-infinite rectangular waveguide with one load is considered in order to demonstrate the method's use.