A shield, typically referring to a component in electronic devices or communication systems used to block or reduce electromagnetic interference, is generally made of metal or Other conductive materials. It forms a closed space or covering layer that prevents the entry or leakage of electromagnetic waves. In electronic devices such as computers, radars, televisions, and mobile phones, shields are widely used to protect devices from external electromagnetic interference or to prevent electromagnetic radiation emitted by the device from affecting the surrounding environment. In highly secure environments such as military facilities, data centers, etc., shields play a crucial role in preventing signal interception.
