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EMI Shielding Cases
知識學習科學百科 2018/12/13 12:02:54

Electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. Shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. Electromagnetic shielding that blocks radio frequency electromagnetic rediation is also known as RF shielding.


Electromagnetic radiation consists of coupled electric and magnetic fields. The electric field produces focus on the carriers, for instance electrons, within the conductor. As soon as an electric field is applied to the surface of an ideal conductor, it induces a current that causes displacement of charge inside the conductor that cancels the applied field inside, at which point the current stops.

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