RADIO FREQUENCY FILTER HAVING CAVITY STRUCTURE

The present disclosure relates to a radio frequency filter having a cavity structure, and including a housing having internally a hollow space and an open side to provide at least one cavity, at least one resonance element located in the hollow space of the housing, a cover configured to have at least one groove which is internally threaded, recessed at a predetermined diameter and depth at a position corresponding to the resonance element, and has a bottom portion that is thinner than other portions, and to close the open side of the housing, and at least one frequency tuning screw configured to threadedly mate with the groove of the cover. When the frequency tuning screw threadedly mates with the groove, a bottom surface of the groove is depressed by the frequency tuning screw toward the resonant element.