Three-frequency filter antenna based on a branch loading resonator and Radio System radio frequency front end

The invention belongs to the technical field of antennas and discloses a three-frequency filter antenna based on a branch loading resonator and a radio System radio frequency front end. The metal floor is only disposed under the input structure and the branch loading resonator. Input structure, branch loaded resonator and three-frequency monopole in the same layer; the input structure adopts parallel coupling feed structure. The main homogeneous impedance resonator of the branch loaded resonator, the open branch and the short branch correspond to three resonant frequencies respectively; three-frequency monopole as a radiation structure and branch loaded resonator integrated to achieve good three-frequency filtering characteristics. As that three-mode branch load resonator of the inventionis integrated with a simple three-frequency monopole, a good filter effect is obtained, and the integration and miniaturization of the antenna and the filter are realized. Antenna structure is compactand simple, simulation re