Frequency reconfigurable microstrip patch antenna based on liquid crystal polymer

The frequency reconfigurable microstrip patch antenna comprises a signal layer, a base material layer and a grounding layer, the signal layer is an FR4 substrate, and the lower surface of the signal layer is partially coated with copper to serve as a metal patch; the base material layer comprises a liquid crystal polymer film layer and an FR4 substrate on the outer side; the grounding layer is an FR4 substrate, and the whole upper surface of the FR4 substrate is coated with copper to serve as a metal grounding plate; the metal patch on the lower surface of the signal layer is in contact with the upper surface of the base material layer; and the lower surface of the base material layer is contacted with the metal grounding plate on the upper surface of the grounding layer. The metal patch is externally connected with the bias voltage, and the dielectric constant of the liquid crystal polymer film is changed by adjusting the external bias voltage, so that the resonant frequency of the microstrip patch antenna i