Numerical and experimental study of the shielding effectiveness of a metallic enclosure

This paper presents a detailed study of the shielding effectivity propertie s of metal enclosures. Measurements in anechoic chambers are compared to fu ll-wave electromagnetic simulations. The study is not limited to the freque ncy range below the first resonance frequency. Different aspects are invest igated such as the influence of the size, position and number of apertures, and the effect of the presence of metal plates and of absorbing materials. Where possible, the specific behavior of the shielding effectivity is expl ained theoretically and existing simple design rules are assessed.