Shielded wire is a transmission wire that uses a mesh braided wire to wrap the signal wire. A conductor 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 conductors close together while reducing the loss of the transmitted signal. Mainly used in the manufacture of wifi jammer, etc.
The shielding layer of the shielded cable is mainly made of non-magnetic materials such as copper and aluminum, and the thickness is very thin, which is much smaller than the skin depth of the metal material at the frequency of use (the so-called skin effect refers to the current distribution in the conductor cross-section as the frequency increases. The higher the frequency, the smaller the skin depth, that is, the higher the frequency, the weaker the penetration ability of electromagnetic waves), the effect of the shielding layer is not mainly due to the reflection and absorption of the electric field and magnetic field by the metal body itself It is caused by the grounding of the shielding layer. Different grounding forms will directly affect the shielding effect.
Edge wire, power cable, communication cable, and optical cable. Wire and cable refer to materials used for power, communication, and related transmission purposes. There are no strict boundaries between "wire" and "cable". Usually, products with a small number of cores, a small product diameter, and a simple structure are called wires, those without insulation are called bare wires, and the others are called cables; those with a larger conductor cross-sectional area (greater than 6 square millimeters) are called large wires. Small (less than or equal to 6 square millimeters) are called small wires, and insulated wires are also called cloth wires.
Wires and cables mainly include bare wires, electromagnetic wires, and insulated wires for electrical appliances, power cables, communication cables, and optical cables. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, and so on. They are all made up of multiple strands of wire used to connect circuits, appliances, etc.
Ordinary: insulating layer + shielding layer + wire. Advanced: Insulation layer + shield layer + signal wire + shield layer ground wire.
