Fully Controllable Beam‐Steering 1‐THz Transmitarray Using Graphene–Metal Hybrid Metasurface

ABSTRACT In this paper, a 1‐THz graphene–metal‐hybrid transmissive metasurface is proposed, which consists of six layers. By applying a dc biasing voltage, over a ‐phase variation of the transmitted wave is obtained. Also a transmitarray for steering a pencil‐beam in the 3D direction is designed using the proposed unit cell. Using the patch type structure in the transmitarray design has less surface wave and edge diffraction, in comparison with slot type transmitarray design, which leads to lower side lobe level and a wider steering angular rang. The obtained maximum gain is 23.5 dB. The designed beam steering is in and .