Propagation in the General, Rectangular Waveguide

Two methods for calculating the propagation characteristics of rectangular waveguides with various internal and external media are presented. The first one is only asymptotically correct and utilizes the reflection coefficients from the walls, taking into to account depolarization. Results are presented for dielectric waveguides and rectangular tunnels in lossy dielectric. The second method is exact, but assumes an impedance condition (isotropic or anisotropic) at the waveguide walls. Results are given for a fully corrugated waveguide, indicating that the so called impedance compatibility condition is not significant.