Propagation in Waveguides of Arbitrary Cross Section with Anisotropic Boundary

Abstract

ABSTRACT The problem of electromagnetic wave propagation in waveguides of arbitrary cross section and with walls characterized by an anisotropic surface admittance is formulated in terms of an integro-differential equation for the equivalent surface currents on the walls. The solution is obtained by application of the Galerkin Moments Method technique, where triangle expansion functions are employed. This model is applied to the study of transversally corrugated waveguides. A procedure to deal with step discontinuities in the boundary conditions (e.g. partially corrugated waveguides) is presented. Comparisons with results obtained with other approaches, in the case of simple geometries, are also presented.