Broad band filter adopting single-chamber-four-module cavity

The utility model discloses a broad band filter adopting a single-chamber-four-module cavity, comprising a cavity, a first port, a second port, a first perturbation metal body and a second perturbation metal body; the first perturbation metal body and the second perturbation metal body are positioned on the bottom of the cavity, the centers of the first perturbation metal body and the second perturbation metal body are deviated from the center of the cavity; the first perturbation metal body and the second perturbation metal body are symmetrical relative to the longitudinal center line of the cavity; the first port and the second port are positioned on the cavity body and pass through the outer wall and the inner wall of the cavity ; the firs port is provided with a first conductive body assembly; the second port is provided with a second conductive body assembly; and the axial line of the first conductive body assembly and the axial line of the second conductive body assembly are perpendicular to each other,