Coaxial cable also called shielded cable, which is a conductor to use a layer of shielding signal line structure. The outer shield conductor is mainly used to reduce the signal line is coupled with the outside world, including the coupling electric field (mutual capacitance) and magnetic coupling (two coupling transformer). In addition, shielded conductors in the textile network form a majority, after the cable shielding measures to eliminate electric field. In general if there is no welding connection right will greatly reduced the effect of shielding, because the signal line in the welding point of not being completely covered with a shield conductor. In order to eliminate the effect of mutual tolerance, our connection between the connector and the cable shielding must be based on the 360 degree close together.

In the terminal production, if can be shielded conductors completely coated signal line, can eliminate the mutual capacitance by the shield conductor can remove the electric coupling, there is no use for magnetic field, magnetic power line signal line production can be easily penetrating the light shield conductor, textile net, in order to reduce the coupling effect of the magnetic field method the current transformer should try to reduce the flow through the back road area, one without shielding the signal line, the magnetic field coupling and the size of the electric current is proportional to the area of road back; when we add our signal shielding measures, or even do has single end grounding processing, however, we can see back area road current no improvement; in the end we add shielding (into coaxial cable), also has two end grounded do not, we can also find back to the current road area has been significantly To reduce the order. So we can concluded that the following three points: I without any shielding signal line is also subject to interference of electric and magnetic coupling. I I shielding measures and single ended ground signal lines (coaxial cables) can eliminate electric field coupling, but there is still no way to solve the magnetic field coupling. III installation of shielding and grounding of the two signal lines (coaxial cable) can also eliminate the electric coupling and magnetic coupling.