EMC shielding

Even perfect shields fail with poor aperture design. Learn how slot orientation, size, and placement affect shielding effectiveness, and discover why multiple small holes outperform single large openings using Babinet's principle.

Part 4A of a comprehensive shielding series derives two practical approximate solutions from exact electromagnetic theory. For good, thick conductors in far-field conditions, multiple-reflection losses become negligible, significantly simplifying shielding effectiveness calculations for engineers.