Power lines of the electric field in the cross section of inhomogeneous arbitrary anisotropic insertion of the rectangular waveguide

An efficient finite difference formulation based on the direct discretization of the integral Maxwell equations is proposed for accurate analysis 3-D waveguiding structures. The results of calculating the electric field lines in the cross section of an anisotropic insert of a rectangular waveguide and the scattering coefficient of the electromagnetic waves in the rectangular waveguide with anisotropic insertion are presented.