Patent ID: 8294536
Filing Date: 2012-10-23
Classification: H01P

Abstract:
1. A cavity filter, comprising: an enclosure comprising a bottom portion, a plurality of sidewalls extending from edges of the bottom portion, each sidewall defining a positioning portion at a top surface opposite to the bottom portion of the enclosure; a plurality of resonators each secured inside the enclosure; a lid covering the enclosure and defining a plurality of thread holes each matched with a tuning screw corresponding to the plurality of resonators, respectively, providing adjustment of a resonating frequency of the cavity filter; a slider movably disposed between the lid and the positioning portions, the slider comprising a plurality of tuning cells corresponding to the plurality of resonators, respectively, each of the plurality of tuning cells comprising a metal tuning portion defining a through hole, wherein the slider comprises a frame surrounding the plurality of tuning cells and positioned on the positioning portions, and the frame comprises a top surface and a bottom surface, and wherein a plurality of nipples are configured on the top surface and the bottom surface correspondingly; and a driving device located inside the enclosure to drive the slider to move along the positioning portions to adjust the resonating frequency of the cavity filter.