The product consists of two-way 3dB mixer, two-way alarming calculation units, two-way alarm units, one-way 1/4 amplifying unit, one low-pass filter, one band-pass filter and one duplexer. The two-way 3dB mixer mix transmitting signals from four ways into two ways (two antennas), where, one antenna is used for receiving and transmitting signals, which will be separated by one high power duplexer, after amplification, receiving signals will be divided into 4 ways and transmitted to system in next level. In addition, an alarm mounted on aerial port will monitor SWR, and will signal when there is excessive aerial reflection. Features The product integrates transmit mixer and receive divider into one and is equipped with 3dB aerial feed system with SWR detection and 1/4 receiving and amplifying functions. It provides higher port isolation and reverse isolation for each channel and high isolation between signals received and transmitted. Working scope The product is applicable for mobile communication system, land base station, extreme ends of transmission and reception of system to receive and transmit signals simultaneously. Customized designs of parts and the complete unit are available to meet user's demand. Technical index Types of port: L16 socket Working temperature: 25oC-- +55oC