Coaxial Cable

Coaxial cable is a commonly used type of cable for transmitting electrical signals. It consists of a center conductor, an insulating layer, an outer conductor, and an outer insulating layer, which are arranged coaxially.

1. Center Conductor: The center conductor is the internal conductor of a coaxial cable and is usually made of copper or a copper alloy. It is the transmission path of the signal and is responsible for transferring the electrical signal from the sending end to the receiving end.
2. Insulation: The insulation layer is located between the center conductor and the outer conductor, and is usually made of insulating materials such as polyethylene (PE) or polyvinyl chloride (PVC). Its role is to isolate the center conductor and the external conductor to prevent signal leakage and interference.
3. External conductor: The external conductor is a copper mesh shield, usually made of multiple strands of fine copper wire braided together. Its function is to provide electromagnetic shielding to prevent external electromagnetic interference from affecting the internal signal.
4. External Insulation: The external insulation is an insulating layer located outside the external conductor, commonly used materials are polyvinyl chloride (PVC) or low density polyethylene (LDPE). It serves to protect the cable from physical damage and environmental influences.

The main features and advantages of coaxial cables include:

1. strong anti-interference ability: due to the electromagnetic shielding provided by the external conductor, coaxial cable has high anti-interference ability for external electromagnetic interference, which can effectively reduce signal loss and interference.
2. Long transmission distance: the design of coaxial cable makes it capable of transmitting signals over long distances, which is suitable for long-distance communication and transmission needs.
3. Good high-frequency characteristics: the structure of coaxial cable makes it has better high-frequency characteristics, suitable for high-frequency signal transmission, such as TV signals, broadband network and wireless communication.
4. Convenient installation: Coaxial cable is relatively flexible and easy to install for a variety of application scenarios, including home, office, industrial and communication infrastructure.

Coaxial cables are widely used in a variety of fields, including television broadcasting, cable television, computer networks, wireless communications, surveillance systems, and audio and video transmission.