Recent developments in reflectarrays: Multi-reconfiguration, solar cells, and graphene

This invited presentation will review our recent research activities related to reflectarray antennas [1-9]. First, beamscanning reflectarrays with additional reconfiguration capabilities in polarization or frequency will be discussed, as well as arrays operating over multiple polarizations or frequencies. Second, initial results on the implementation of reflectarray antennas on thin-film solar cell panels will be presented. Finally, we will show how graphene can beneficially be used for implementing the reconfigurable reflectarray concept at terahertz or infrared frequencies.