Sixth, shielding

In modern electrical and electronic equipment, the density of components and their related functions is increasing day by day, which imposes strict limits on electromagnetic interference. Therefore, the connector is often enclosed with a metal shell to prevent internal electromagnetic energy radiation or interference from external electromagnetic fields. At low frequencies, only magnetic materials can significantly shield the magnetic field. At this time, there are certain regulations on the electrical continuity of the metal shell, that is, the shell contact resistance.