A Terahertz RF Selective Switch Based on Graphene

According to the variable conductivity of the graphene and the principle of surface acoustic wave, a new type of 30THz three billing graphene frequency selective switch is proposed in this paper. The selection switch has 3 selection paths. By controlling the conductivity of graphene, we can change the refractive index of the intermediate graphene lens, then change the direction of the plane wave and choose signal pathway flexibly. There is a good isolation between the output ports, the minimum value can reach -30dB. And the attenuation of signal input and output is about -10dB. On the whole, the selection switch has the characteristics of scalable, tunable, and high isolation, has a greater inspiration for graphene device design in the future.