The duplexer has three ports: RX, TX, and ANT, which are used in various mobile communication systems such as repeater, indoor coverage, and base stations. It enables the receiving (RX) and transmitting (TX) of the system to share a single antenna without interfering with each other. A duplexer consists of two filters (transmit and receive filters). Common ones include GSM duplexers, CDMA duplexers, LTE duplexers, WCDMA duplexers, and so on. Duplex power cover 200-1000W, intermodulation coverage 150-170dBc.