Cavity filter

The embodiment of the invention discloses a cavity filter, and a cover assembly covers one end, far away from a bottom wall, of a side wall to form a resonant cavity. An adjusting window and a guide column are arranged on the cover plate, and the adjusting window penetrates through the cover plate. Therefore, the shielding part is rotatably arranged on the guide column, so that an operator can rotate the shielding part, and then the overlapping area of the shielding part and the adjusting window is adjusted in the axial direction of the guide column. Therefore, the difficulty of adjusting the resonant frequency of the cavity filter by an operator is reduced. And on the other hand, by increasing the size of the adjusting window, the resonant frequency can be adjusted in a larger amplitude. Furthermore, the cavity filter can adapt to more working conditions. 本发明实施例公开了一种腔体滤波器，将盖组件盖设在侧壁远离底壁的一端，以形成谐振腔。在盖板上设置调节窗和导向柱，该调节窗贯穿盖板设置。由此，将遮挡部可转动地设置于导向柱，使得操作人员可以转动遮挡部，进而在导向柱的轴向上，调整遮挡部与调节窗的重合面积。从而，降低了操作人员对腔体滤波器谐振频率的调节难度。另一方面，