Mid-Infrared Reflect-Array Antenna With Beam Switching Enabled by Continuous Graphene Layer

Tunable graphene conductivity can enable dynamic control of the reflection characteristics of near-resonant electromagnetic structures. In this letter, a mid-infrared reflect-array antenna with binary beam switching is presented. The proposed structure consists of a uniform graphene monolayer patterned with an aperiodic array of near-resonant metallic split-ring resonators. By controlling the chemical potential of the continuous graphene layer through electrostatic biasing, the reflection phase and amplitude of the split-ring resonator is controlled, providing binary beam switching capability to the reflect-array.