Metal Cavity Filter

Metal cavity filter is a passive RF filter that uses air-filled or dielectric-loaded metal cavities as resonant structures to achieve frequency selection. It offers extremely low insertion loss, high power handling capability, excellent selectivity, and superior temperature stability, making it ideal for high-performance applications such as base stations, broadcast transmitters, and military communication systems.

Metal cavity duplexer combines two metal cavity filters—typically a transmit filter and a receive filter—into a single unit with a common antenna port. It allows simultaneous transmission and reception over a single antenna while providing high isolation between the TX and RX paths. With its low insertion loss and high power handling, it is widely used in base stations, repeaters, and other high-power wireless communication systems.