| 摘要 |
Disclosed is a cavity filter, relating to communication technologies, so as to achieve the purpose of improving a power capacity and a frequency regulation range of the filter in the case that the filter cavity depth is made small in size. The cavity filter comprises a cavity with an upper end opening, a cover plate, a tuning screw rod and a resonance rod. The resonance rod is fixed on a bottom plate of the cavity and is accommodated in the cavity. The cover plate is fixedly mounted at the opening of the cavity, and a screw hole is provided on the cover plate. The tuning screw rod matches the screw hole and one end thereof penetrates through the cover plate and extends into the cavity. The middle of the resonance rod is provided with a through hole, the tuning screw rod extends into the through hole, and the outer wall of the resonance rod is fixedly connected to the bottom plate of the cavity. The present invention improves a power capacity and a frequency regulation range of a filter in the case that the filter cavity depth is made small in size. |
