Drainage effect of copper-plastic composite tape and aluminum-plastic composite tape

Do you need a drain wire wherever copper-plastic composite tape or aluminum-plastic composite tape is used? What is the role of the drainage line here? Sometimes what is the role of drain wire for steel belt armor? Because copper-plastic composite tape, aluminum-plastic composite tape and other shielding materials will generate induced current. This induced current forms an accumulation of charge on the surface of the metal shielding layer. This charge accumulation makes the electromagnetic field distribution more complicated. Because the frequency and intensity of the signal current are constantly changing, the induced voltage on the metal shield is also constantly changing. Charge flow occurs when the voltage changes. The drain wire is to take away these charges in time, to avoid the accumulation of the electric field caused by the electric field concentrated shielding material, the energy loss of the induced magnetic field is also irreversible. Of course, the relatively complete closed magnetic field provided by the metal shield layer to the data cable is helpful to improve the attenuation performance and return The contribution made by indicators such as wave loss is far greater than this disadvantage. Generally, cables using drain wires are mostly cables with open magnetic field structures. Coaxial structures are rarely used mainly because the magnetic field of coaxial cables is closed.

1. Make the shielding layer continuous shielding effect best

2. Easy grounding construction.