The main function of cable shielding material（1）

The materials of the shielding layer of the shielded network cable are aluminum foil and braided net. What is the difference between the two materials used?

Aluminum foil is mainly used to shield high-frequency electromagnetic waves to prevent high-frequency electromagnetic waves from contacting the conductors of the network cable to generate induced currents and increase crosstalk. When the high-frequency electromagnetic wave touches the aluminum foil, according to Faraday's law of electromagnetic induction, the electromagnetic wave will adhere to the surface of the aluminum foil and generate an induced current. At this time, a conductor is needed to guide the induced current into the ground to avoid the induced current from interfering with the transmission signal. The network cable that uses aluminum foil as the shielding layer generally requires that the repetition rate of the aluminum foil should not be lower than 20%. This type of network cable is mainly used in hospitals, factories and other places with strong electromagnetic wave radiation or a large number of strong electrical equipment; in addition, it is also used in areas with high network security requirements such as the government.