CAVITY FILTER INCLUDING COXIAL RESONATOR

摘要

Disclosed is a cavity filter including a coaxial resonator. The disclosed filter comprises: a housing having at least one cavity formed thereon, and including a coaxial resonator contained in the cavity; a ceramic dielectric coupled to an upper part of the coaxial resonator; a cover coupled to an upper part of the housing; and a pressurizing member coupled to the cover. An insertion area to insert the pressurizing member is formed in the cover. A thin film unit having the thickness lower than that of a main body of the cover is formed in the insertion area. The pressurizing member is inserted in the insertion area to pressurize the thin film unit. The ceramic dielectric is in contact with the thin film unit. The disclosed filter can be manufactured as a miniaturized structure, and can be used in a low power miniaturized base station.