Beam-Scanning Lens Antenna Based on Corrugated Parallel-Plate Waveguides

A lens antenna based on dispersion characteristics of corrugated waveguide is presented for one-dimensional (1-D) beam scanning at Ka-band. The dispersion characteristics of the corrugated waveguide can be controlled by adjusting the parameters of the corrugations. Thus, the effective index of refraction of the corrugated waveguide can be designed to realize the required phase delay to transform c...