Application of the Asymptotic Corrugation Boundary Conditions to the Analysis of Composite Right/Left-Handed Corrugated Waveguide

Abstract

The asymptotic corrugation boundary conditions are employed to analyze left-handed rectangular waveguides with dielectric-filled transverse corrugations. The dispersion relations as well as the field expressions in the waveguide and the corrugation are derived. Compared to the rather sophisticated full-wave solution, the asymptotic solution proves to provide accurate results within a wide frequency band. The limitations of the asymptotic boundary conditions are investigated to determine the range of validity of the presented solution.