Why should a shielding cover be added to electronic products such as mobile phones and routers-hardware

Electromagnetic interference is everywhere in life, especially today when electronic products are developed. In fact, electromagnetic interference and anti-interference have a long history! Why add shielding covers to electronic products such as mobile phones and routers? Next, Xiaoshuo will simply communicate with you: Put two kinds of media with different magnetic permeability into the magnetic field, and the magnetic field will change suddenly at their interface. At this time, the magnitude and direction of the magnetic induction intensity will change. In other words, it causes the refraction of the magnetic lines of induction. In order to prevent the interference of the external magnetic field, a magnetic shield is often added to the outside of the electron beam focusing part of the oscilloscope and kinescope, which can play a role of magnetic shielding. In electronic equipment, some components need to prevent interference from external magnetic fields. In order to solve this problem, it is necessary to use a metal material to make a cover, and cover the parts that need to be anti-interference in it to isolate it from the external magnetic field. You can also cover the parts that radiate and interfere with the magnetic field so that it cannot interfere with other parts. Parts. This kind of shielded cover is called a shielding cover. Because the magnetic resistance of the metal shielding shell is very small, it provides a smooth magnetic circuit for the external interference magnetic field, so that the magnetic lines of force are short-circuited through the metal shell and no longer affect the components that are shielded inside. To understand the knowledge of the shield, welcome to add Xiaoshuo WeChat: in-depth communication.