Coaxial cables are a type of transmission cable used to transmit radio frequency (RF) signals. They generally consist of four layers—the inner conductor layer, the inner conductor insulating layer, the conductive shield layer, and the insulating outer jacket layer. This shielded design enables signal carrying voltage to flow through the central conductor with minimal interference from outside electrical and/or magnetic fields.

There are many types of coaxial cables available—varying in design and size—to suit different applications. One of the key design elements by which coaxial cables can be categorized is connector type—i.e., the mechanism that connects the cable to other devices. Below, we highlight the several common types of coaxial cable, based on connector, as well as their typical applications.

BNC

Bayonet Neill-Concelman (BNC) coaxial cable connectors are one of the most commonly used connector types. They feature a twist and snap bayonet connection design that requires a quarter-turn to form a connection.

TNC

Threaded Neill-Concelman (TNC) connectors are a miniature threaded variation of BNC connectors. However, they are waterproof and more rugged.

SMA

Subminiature Version A (SMA) connectors are 50 Ω connectors. They are available in several formats, including male vs. female, straight-through vs. right-angled, and more.

7/16 DIN

7/16 DIN (Deutsches Institut für Normung) connectors have a threaded design. They are typically used for high-wattage transmissions.

QMA

QMA connectors are similar to SMA connectors. However, they have a snap-lock design that allows for faster and easier connection/disconnection and 360° rotational capabilities after connection that allows for better installation flexibility.

MCX

Micro coaxial (MCX) connectors are small form-factor connectors. They are designed for use in applications with size or space limitations.

RCA

Radio Corporation of America (RCA) connectors are also known as cinch connectors. They typically feature three color-coded jacks and plugs (Red, Yellow, and White).