Design of a novel graphene terahertz antenna at 500GHz with reconfigurable radiation pattern

This paper proposes the design of a novel beam reconfigurable antenna operating at 500GHz. Such antenna is based on single-layer-graphene patches with tunable electrical conductivity. Three groups of graphene patches play a key role for achieving directivity such as for the Yagi-Uda antenna. The conductivity of each graphene patch can be dynamically controlled by the DC biasing voltage. Numerical results show that the radiation beam of the antenna can vary in a range of ±50°, its input impedance bandwidth is about 8% with the peak gain of 7.5dB obtained.