How can the heat dissipation structure of a power DTU also provide shielding?

To ensure both heat dissipation and shielding effectiveness in DTU systems, ventilation holes must be designed. These holes utilize waveguide window structures with a diameter less than λ/10 (typically less than 5mm) and a depth greater than three times the diameter. For large ventilation holes, metal mesh is used for coverage, with mesh sizes less than λ/10. The heatsink is electrically connected to the housing, ensuring contact via thermal pads or conductive adhesive. Testing uses a shielding effectiveness testing system; the shielding effectiveness should be greater than 40dB in the 30MHz-1GHz range. This balanced design allows for both heat dissipation and shielding to meet requirements, making it suitable for high-power equipment.