What Is Shielded Wire?

The shielded wire is a transmission line that uses a mesh braided wire to wrap the signal wire. The wire wrapped with a conductor outside the wire is called a shielded wire, and the wrapped conductor is called a shielding layer, which is generally a braided copper mesh or (aluminum). The shielding layer needs to be grounded. External The interference signal of the shielded cable can be introduced into the ground by this layer, preventing the interference signal from entering the inner conductor and reducing the loss of the transmission signal. The shielding layer of the shielded cable is mainly made of non-magnetic materials such as copper and aluminum, and the effect of the shielding layer is not mainly due to It is produced by the reflection and absorption of the electric field and magnetic field by the metal body itself, but is produced by the grounding of the shielding layer. Different grounding forms will directly affect the shielding effect.