Customized RF coaxial cable in china refers to a cable with two concentric conductors, and the conductor and shielding layer share the same axis. The most common RF coaxial cable is composed of copper conductor isolated by insulating material. Outside the inner insulating material is another layer of ring conductor and insulator, and then the whole cable is wrapped by PVC or Teflon sheath. At the same time, customized RF coaxial cable in china is widely used in RF or audio and video transmission. The transmission impedance is generally 75 Ω, which has become the standard impedance of video transmission. High quality standard RF coaxial cable in china is generally more expensive than twisted pair cable, because the reliable physical characteristics of customized RF coaxial cable in china can provide excellent performance for audio and video. The frequency and resolution of the signal and the effective transmission distance of the cable also play a decisive role in the audio and video system.

Customized RF coaxial cable in china is subdivided into rg-58 and thick cable rg-11. And the rarely used semi-rigid coaxial cable and feeder.

Thick RF coaxial cable in china: the diameter of thick cable (rg-11) is 1.27cm, and the maximum transmission distance can be up to 500m. Because the diameter is quite thick, its elasticity is also relatively poor, and it is not suitable for erection in a narrow indoor environment. At the same time, the manufacturing method of rg-11 connector is relatively complex, and it can not be directly connected with the computer. It needs to be converted into AUI connector through an adapter before it can be connected to the computer. Because the thick cable has strong strength and the maximum transmission distance is longer than the thin cable, the main purpose of RF coaxial cable thick cable is to play the role of network backbone and connect several networks formed by thin cables. The impedance of thick cable is 75 Ω.

Thin RF coaxial cable in china: the diameter of the thin cable is 0.26cm and the maximum transmission distance is 185m. When used, it is connected with 50 Ω terminal resistance, T-connector, BNC connector and network card. Because the wire price and connector cost are relatively cheap, and there is no need to purchase hub and other equipment, it is very suitable for setting up a small Ethernet network with concentrated terminal equipment. However, the total length of the cable should not exceed 185m, otherwise the signal will be seriously attenuated. The impedance of the thin cable is 50 Ω.

Semi rigid RF coaxial cable in china: this kind of cable is rarely used. It is usually used for the module connection inside the communication transmitter, because the transmission loss of this cable is very small, but it also has some disadvantages, such as "high hardness and not easy to bend." In addition, the transmission frequency of such cables is very high, and most of them can reach 30ghz. For example, the typical structure of cxj-50-3 cable is shown in the following table, and the diameter of structural material (mm) is 1 Inner conductor silver plated copper wire 0.93 2 Insulator polytetrafluoroethylene (PTFE) 3.00 3 Outer conductor

At present, the process of customized RF coaxial cable in china is also gradually improving, and some such wires with relatively large bending range have appeared. It is recommended to use such wires of traditional copper tube outer conductor as far as possible in places where flexibility requirements are not high, so as to ensure stability.