The invention discloses a reflective dual-layer
liquid crystal phase shifting unit based on a patterned
graphene electrode. The reflective dual-layer
liquid crystal phase shifting unit comprises an upper medium substrate layer, a middle medium substrate layer and a lower medium substrate layer, a first
liquid crystal layer is injected into a gap formed between the upper medium substrate layer andthe middle medium substrate layer, the lower surface of the upper medium substrate layer is provided with a plurality of
metal patches which are sequentially connected in series through a connecting line, and a
metal microstrip structure is formed; the upper surface of the lower medium substrate layer is fully covered with a
metal layer, and a metal grounded
electrode is formed; and a second liquid
crystal layer is injected into a gap formed between the middle medium substrate layer and the metal grounded layer, and a
graphene patch layer which has the same structure as the metal
microstrip structure and has the different thickness is arranged on the upper surface of the middle medium substrate layer to serve as a
graphene electrode. According to the phase shifting unit,
electricity tuningof
dielectric constants of two
layers of liquid
crystal materials can be achieved, and therefore the working bandwidth of the phase shifting unit is increased; and meanwhile, by changing the bias
voltage of the
graphene electrode, the
chemical potential energy of graphene can be changed, and then the working bandwidth of the phase shifting unit is further increased.