Novel Propagation Characteristic Expressions of Anisotropic Rectangular Waveguides

This paper introduces novel expressions to analytically determine the phase constant of EM fields in an homogeneous uniaxial electric and magnetic anisotropic rectangular waveguide (RWG) with arbitrary transverse dimensions, while focusing on the fundamental mode. To successfully evaluate the reliability of the proposed analytical results, the numerical modeling method of moments was used with the operator formalism concept for an easier formulation of the boundary conditions. Selected trigonometric trial functions lead to more accurate analysis of such RWG since close agreement was found between the results obtained from our analytical expressions and those given by the numerical method.