The shielding layer generally needs to be grounded. The function of the shielding wire is to isolate the electromagnetic field noise source from the sensitive equipment and cut off the propagation path of the noise source. Shielding is divided into active shielding and passive shielding. The purpose of active shielding is to prevent the noise source from radiating outwards. Shielding of noise sources; the purpose of passive shielding is to prevent sensitive equipment from being interfered by noise sources, and it is the shielding of sensitive equipment.
Shielded wire structure: sheath + shielding layer + filling + aluminum foil + insulation + wire
