A study of extended hemispherical lenses for a high-gain beam-steering antenna

Abstract

In this paper, large extended hemispherical lenses are studied for a high-gain beam-steering antenna as a function of directivity of a feed element, relative permittivity of the lens material, and feed offset. Design guidelines necessary for the feed array design are provided. A wide range of permittivities and feed directivities are studied. The lenses are analysed with ray-tracing simulations using a simplified feed radiation pattern.