BNC connector

BNC connector

BNC connector is a type of radio frequency connector used for terminating coaxial cables. The BNC (Bayonet Neill–Concelman) connector is widely used in television, radio, and other radio-frequency electronic equipment for efficient and reliable connections. The connector was named after its inventors, Paul Neill of Bell Labs and Carl Concelman of Amphenol, and features a bayonet-style locking mechanism that ensures a secure connection.

History

The BNC connector was developed in the late 1940s, primarily for military use, before finding widespread adoption in commercial and scientific applications. Its design was intended to address the need for a quick-connect/disconnect connector with minimal signal loss at higher frequencies.

Design

The BNC connector is characterized by its two-part structure: the male connector or plug, and the female connector or jack. The male connector has a pin that fits into a corresponding slot in the female connector. The connection is secured by a quarter-turn of the coupling nut on the male connector, which engages a bayonet lock on the female connector.

BNC connectors are designed to support a range of frequencies, typically up to 4 GHz, but some precision connectors can operate up to 18 GHz. The impedance of the connector is either 50 Ohms, for applications such as digital and RF, or 75 Ohms, for applications such as video.

Applications

BNC connectors are used in a variety of applications where a secure, quick to connect and disconnect RF connection is required. Common uses include:

• Test equipment: Oscilloscopes, signal generators, and analyzers often use BNC connectors for connecting to the device under test.
• Radio: Antennas, receivers, and transmitters may use BNC connectors for RF connections.
• Television: Video equipment, including cameras and monitors, frequently employs 75 Ohm BNC connectors for video signal transmission.
• Computing: Some network devices and industrial computers use BNC connectors for network connections.

Variants

Several variants of the BNC connector exist, including:

• Mini-BNC: A smaller version of the BNC connector designed for higher density applications.
• High-voltage BNC: Designed for applications requiring high voltage handling capability.
• Triaxial BNC: A version with an additional outer conductor for improved shielding and isolation.

Installation

Installing a BNC connector onto a coaxial cable requires specific tools and techniques to ensure a reliable connection. This typically involves stripping the cable, preparing the shield and dielectric, and securing the connector with a crimping tool.

Advantages and Disadvantages

The BNC connector offers several advantages, including quick and secure connections, good RF performance, and a wide range of applications. However, its frequency limit and mechanical size can be disadvantages in some high-frequency or miniaturized applications.

See Also

• Coaxial cable
• RF connector
• Television
• Radio frequency