Design of Dual-Reflectarray Antenna for Beam Scanning

This paper describes an architecture for a Ku-band antenna based on a dual flat reflectarray configuration that provides electronic beam scanning within a 13 degree angular range. The antenna configuration presents the simplicity of being implemented with two flat reflectarrays, it provides a compact optics and it can be easily folded and deployed. The main reflectarray emulates a parabolic reflector and the beam scanning is achieved by introducing a phase-control into the elements of the sub-reflectarray. These elements are based on two stacked printed patches aperture-coupled to delay lines, which can be constructed using MEMS switches to provide electronic beam scanning.