THz Leaky-Wave Antenna Beam Steering With Low Loss Dynamic Tuning

Piezo-Electric Actuator (PEA) based electromechanically tunable Partially Reflective Surface (PRS) is proposed for high efficiency terahertz (THz) antenna beam steering. A phase shift of about 40° is achieved the by varying the mechanical separation between the PRS metasurface and ground layer. A high gain (18dBi) Leaky-Wave Antenna (LWA) is designed at 280 GHz band with 18
^o
beam steering. The presented phase shifting technique offers an extremely low loss solution for antenna beam steering at THz frequencies.