Propagation in a dielectric-lined circular waveguide

A model for dielectric-lined circular waveguide is developed for use in a feasibility study of trunk waveguide communication systems. The model is designed so that a rapid calculation of the propagation coefficients may be made over a wide range of typical waveguide parameters using an interactive minicomputer program. The theory, which is more general than previous theories for dielectric-lined circular waveguides, is derived making use of complex cutoff and propagation coefficients, and may be applied to most circularly symmetric problems having two concentric dielectric materials. An error analysis of the model confirms its usefulness in waveguide-system studies.