A Shielding Cover is a device used in Electronic Equipment with primary functions that include shielding internal circuits from external electromagnetic interference, preventing internal electromagnetic radiation from emitting outwards, protecting internal circuits and components from external electromagnetic interference, and preventing internal electromagnetic radiation from leaking into the external environment. Through its design and material selection, the shielding cover effectively isolates electromagnetic fields, absorbs and reflects electromagnetic waves, and provides good protection and isolation.

The functions of the shielding cover are mainly reflected in the following aspects:

· Shielding external electromagnetic waves: The shielding cover effectively isolates electromagnetic fields, preventing external electromagnetic waves from interfering with internal circuits, thereby ensuring the normal operation of electronic equipment.

· Preventing internal electromagnetic radiation: The shielding cover can prevent electromagnetic radiation generated by internal circuits from leaking into the external environment, reducing interference to surrounding devices.

· Protecting circuits and components: The shielding cover protects internal circuits and components from external electromagnetic interference, avoiding performance degradation or damage to the equipment.

· Improving circuit performance: By reducing the noise level of the circuit system, the signal-to-noise ratio is improved, thereby enhancing the overall performance of the circuit.

· Heat dissipation and strength enhancement: The shielding cover also aids in heat dissipation, helping equipment maintain normal operating temperatures; at the same time, the metallic material of the shielding cover increases the device's strength and impact resistance.

The material choices for shielding covers include metals such as copper, aluminum, and steel, as well as non-metallic materials like plastics and coatings, with the specific choice depending on application needs. Copper is widely used due to its excellent conductivity and oxidation resistance, while aluminum is chosen in some scenarios for its lightweight and low cost.