双模双工器

The utility model discloses a dual-mode duplexer. The dual-mode duplexer is composed of a common input structure and two identical links connected to the common input structure, and each link consists of at least two resonant cavities and It consists of at least two coupling structures. The resonant cavity and the coupling structure in each link are alternately connected, and the common input structure is directly connected to one coupling structure in each link. The resonant cavity is preferably a rectangular double-mode resonant cavity. The two coupling structures on each resonant cavity are located near two adjacent vertex angles of the resonant cavity, and can be respectively located on the same side, on two opposite sides or on two adjacent sides of the resonant cavity. The utility model is flexible in design, can design the position of the coupling structure according to actual needs, has simple structure, convenient processing and debugging, and has the advantages of low insertion loss and high isolation. It is mainly used in electronic systems in various microwave bands, especially radar and communication. , Missile guidance and other fields.