Transmission characteristic on a partially ridge-loaded composite right/left-handed cylindrical waveguide

This paper proposes a composite right/left-handed (CRLH) cylindrical waveguide. Negative permeability is realized by the cutoff TM₀₁-mode in a hollow waveguide and also negative permittivity is realized by the cutoff dominant TE-mode in a sector waveguide with a ridge. Usefulness of the proposed cylindrical waveguide is verified from the numerical computations of both the dispersion diagrams and the transmission characteristics of the structure with the finite-number unit cells between the calculated and measured values.