The numerical solutions of cut-off frequencies in two-dielectric layered waveguide by using boundary element method

Abstract

This paper diseusses the general principle of finding the cut-off frequencies in two-dielectric layered waveguides by using the boundary element method, based on the fundamental solution of a two dimensional Helmholtz equation. In terms of the formulae given in the paper, some numerical results are obtained for two commonly used configurations. The fimal results show that the method is of an appreciable precision.