How to ensure shielding continuity in the gaps of EPS cabinets?

Ensuring the continuity of shielding at gaps in EPS metal cabinets is crucial for maintaining the overall shielding effectiveness of the cabinet. Gaps can leak electromagnetic waves, and the amount of leakage depends on the gap length, width, and frequency. Methods to ensure continuity include:

1. Increasing contact points: Use multiple screws to secure adjacent metal plates, with the screw spacing much less than 1/20th of the highest frequency wavelength to be shielded (e.g., for 1GHz, the spacing should be less than 15mm).

2. Using conductive gaskets: Install conductive gaskets (such as wire mesh gaskets, conductive rubber, or finger springs) at the seams to fill the gaps and establish conductive contact between the metals. The gaskets must have sufficient compression and elasticity to compensate for surface unevenness.

3. Addressing long gaps: For long gaps such as door seams, continuous conductive gaskets should be arranged along the entire length of the gap, ensuring sufficient closing force from the door to press the gaskets firmly.

4. Surface treatment: Remove non-conductive coatings such as paint and oxide layers from areas where gaskets are installed or in direct contact, ensuring direct metal-to-metal or metal-to-gasket contact.