Performance evaluation of novel technologies for terahertz reflectarrays

We describe the current status of our research on reflectarray antennas operating at terahertz frequencies. We present preliminary measurements of a fixed beam reflectarray operating at 1 THz fabricated on silicon and characterized with a THz time domain system. Secondly, we study theoretically the applicability of novel reconfigurable materials, namely graphene and vanadium dioxide to attain phase modulation in terahertz reflectarray cells, providing theoretical upper bounds on the performance in terms of loss and phase range.