Coaxial cable consists of four parts: inner conductor, insulation layer, outer conductor (usually braided mesh or metal foil) and outer sheath. It has excellent bandwidth and anti-interference performance.
Its main uses include video surveillance systems, cable television (CATV), Internet connections, broadcast television, radio frequency (RF) applications, satellite communications, audio transmission, measurement and test equipment, military and aerospace, local area network (LAN) connections, fiber optic and coaxial conversion, medical equipment, power systems and antenna connections.
In the past, analog surveillance cameras mostly used coaxial cables to transmit video signals, and now some high-definition surveillance also uses them. The TV signal at home is transmitted from the operator through coaxial cables to ensure a clear TV picture. For example, in high-frequency applications such as radio, radar, and satellite communications, coaxial cables are used to transmit signals to ensure signal strength and clarity.
In short, coaxial cable is an "old friend" for transmitting various signals, whether it is video, audio, or the Internet or broadcasting, it is almost present.
