The BNC connector is a type of coaxial RF (Radio frequency) electrical connector that is used in place of coaxial connectors. The BNC connector got its name from its bayonet mount locking device and its inventors, Paul Neill and Carl Concelman. Its close-fitting connection uses a mount comparable to a knife (bayonet) that is attached onto the end of a rifle.
One of the benefits of the BNC connector is its close-fitting connection. The connection is locked by the BNC male connector that has a pin that fits into the main conducting wire. It is then secured in place with an external ring that turns to a locked position. A BNC connector can be connected to various types of coaxial cables and typically uses voltages below 500 volts and frequencies below 3 GigaHertz. BNC connectors are most commonly made in 50 and 75 ohm versions, matched for use with cables of the same characteristic impedance. BNC’s are ideally used for high speed video, aerospace electronics and test equipment applications.