Sub-THz and THz Reflectarrays for Imaging Systems: Challenges and Opportunities

The endless search for increased bandwidth, decreased physical size and reduced cost in antenna arrays has driven the design of antenna arrays to ever higher frequencies, with the extreme being the THz band. Challenges in such designs have driven rising interest in reflectarray architectures, including a recent demonstration with ~10,000 antennas in a 5×5 square centimeter package at 265GHz. A number of challenges exist in such systems, including (1) packaging of antennas and transceiver, (2) losses, size and power consumption of phase shifters, (3) control of such large-scale and complex systems. This workshop addresses these considerations with real-world implementations as well as an outlook for the future of such systems.