The Analysis of Inset Dielectric Guide using Transverse Resonance Diffraction

This paper presents an analysis of the inset dielectric guide which is an easy to manufacture transmission medium for microwave and millimetre waves. Transverse Resonance Diffraction is used to form a system of two coupled integral eigenvalue equations for the propagation constant. This system is solved by the Galerkin's method leading to a scalar transverse equivalent circuit for the mode of propagation similar to that of a discontinuity in waveguide. The basis functions are chosen so as to take into account the correct boundary conditions for the field at the metal edges. Computed results for the dispersion are compared with experiment.