Analysis of multi-faceted reflectarrays based-on Cassegrain optics

Abstract

This contribution presents a compact multi-faceted reflectarray in a Cassegrain configuration. The reflectarray surface is comprised of five identical panels arranged edge to edge following a cylindrical parabolic profile. The antenna provides dual linear polarization (LP) and it operates in Kaband, generating a broadside beam pattern. The performance of this antenna is assessed and compared with two alternative approaches: a single-facet reflectarray and a multi-faceted structure with three identical panels. The proposed multifaceted structure achieves the best in-band performance, with a 60% enhancement in the gain–bandwidth product compared to the single-facet case and a 10% improvement compared to the multi-faceted approach based on three panels