Effects of Aperture Thickness on the Shielding Effectiveness of Metallic Enclosures

The effects of apertures with finite thickness on the shielding effectiveness of rectangular metallic enclosures is investigated through an approximate but efficient formulation based on the method of moments. As expected, the analysis shows that the finite aperture thickness can help to increase the shielding effectiveness of the structure, especially in the high- frequency region. Comparisons with rigorous full-wave results confirm the validity of the proposed technique.