RF connectors (radio frequency connectors) are electrical connectors that can work at radio frequencies that are in the multi-megahertz range. Coaxial cables are typically used with RF connectors because they maintain the shielding provided by the coaxial design. As a result of better models, signal reflection and power loss are reduced by minimizing the change in transmission line impedance at the connection.RF connectors are used for TV receivers, WIFI devices, measurement equipment, automobile with antennas, including type N connector, BNC, SMA, SMB, SMC, TNC, RCA, MCX connectors. 50 Ohms or 75Ohms.For example, SMA connectors is a kind of coaxial connector with small screw thread. It has the characteristics of wide frequency band, excellent performance, high reliability and long life. The SMA connector is used to connect the RF cable or microstrip line in the RF loop of microwave equipment and digital communication system. On wireless devices, it is usually used for the GPS clock interface on the board and the test port of the base station RADIO frequency module. It supports signal frequencies ranging from DC to 18GHz, and some types can support up to 26.5ghz.