The shield on the shielded cable is the cable formed in the way of the transmission cable plus a shield against external electromagnetic interference. The so-called ‘cable shielding’ on the cable structure is also a measure to improve the distribution of electric fields. The cable conductor is made of multiple strands of wire stranded, it is easy to form an air gap between the insulation layer, and the conductor surface is not smooth, which will cause the electric field concentration. Then the following will give you detailed knowledge about shielded cables.
