What is coaxial cable? Who are the domestic and international manufacturers of coaxial cables?

First, what is coaxial cable? Coaxial Cable, also known as coaxial cable and coaxial cable wire, is a type of cable used to transmit high-frequency signals. It is made up of a center conductor, a layer of insulation, a layer of annular metal conductor and a layer of external insulation. The center conductor and the outer conductor share the same axis, hence the name coaxial cable. The center conductor of a coaxial cable is generally a solid metal wire, usually copper or copper alloy, the diameter of which can be selected according to the frequency of the transmission requirements and the transmission distance required. Because the center conductor is in the center of the coaxial cable, it transmits signals very quickly. However, the center conductor is subject to a lot of interference and noise due to the influence of external conductors. The insulation of a coaxial cable is a layer of material used to protect the center conductor. The insulation is usually made of materials such as polyethylene foam, polytetrafluoroethylene (PTFE), and polyethylene (PE). Different insulating materials have different properties, for example, polyethylene foam improves the speed of signal transmission, while PTFE improves the quality of signal transmission. The ring metal conductor of a coaxial cable is a layer of material used to shield against interference. The ring metal conductor is usually made of copper or aluminum foil and has good electromagnetic shielding properties. It can avoid the influence of external signals on the center conductor and improve the quality of signal transmission. The ring metal conductor also prevents signal leakage from affecting the surrounding equipment. The external insulation of coaxial cables is a layer of material used to protect the entire cable. The external insulation is usually made of materials such as polyethylene and polyvinyl chloride (PVC). The thickness of the outer insulation layer can be selected according to the environmental conditions and the requirements of the cable. Coaxial cable is a type of cable that is widely used to transmit signals in fields such as communications and broadcasting. It has many advantages such as high speed transmission, stable signal, high frequency range and good shielding performance. The structural design of coaxial line cable enables it to excel in immunity and immunity to interference, which is the main aspect that sets it apart from other types of cables. The structure of coaxial cable helps to minimize signal interference. Since its internal conductors are wrapped in a shield, this prevents external electromagnetic signals from interfering with the transmission of signals. Additionally, the outer insulation of coaxial cable prevents signals from escaping and protects internal components from physical damage. This makes coaxial cable more durable and reliable than other types of cable. Coaxial cable can also transmit signals over longer distances without losing signal strength. This makes it very useful in many applications such as cable television, television broadcasting and satellite communications. Coaxial cable has a wide range of frequencies, so it can carry many types of signals, from low-frequency signals (such as analog TV signals) to high-frequency signals (such as digital TV and high-speed internet). In coaxial cable, signals are transmitted between an inner conductor and a shield. The inner conductor is usually made of copper because it has good electrical conductivity and corrosion resistance. The shield is usually made of aluminum foil or copper fabric and is connected to ground through a ground wire to provide better shielding. In some cases, the shield may need to be multilayered or with other metal layers to provide better interference immunity.

Second, what are the domestic and foreign manufacturers of coaxial cable?

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