Home > News > Content
Working Principle Of Coaxial Cable
- Oct 26, 2018 -

Coaxial cable is divided into four layers from inside to outside: center copper wire (single solid wire or multiple stranded wire), plastic insulator, mesh conductive layer and wire sheath. The central copper wire and the reticulated conductive layer form the current loop. Because the central copper line and the reticulated conductive layer is coaxial relationship.


Coaxial cables carry alternating current instead of direct current, which means several reversals of current occur every second.


If a normal wire is used to transmit a high frequency current, the wire will act as an antenna transmitting a radio to the outside.


Coaxial cable is designed to solve this problem. The radio emitted by the central wire is isolated by the reticulated conductive layer, which controls the radio transmitted by grounding.


The problem with coaxial cables is that the distance between the central wire and the reticulated conductive layer is not constant if a portion of the cable is squeezed or distorted, causing internal radio waves to be reflected back to the sending source. This effect reduces the power of the signal that can be received. To overcome this problem, a layer of plastic insulation is added between the central wire and the reticulated conductive layer to keep the distance between them constant. This also makes the cable more rigid and less flexible.