EMI from airflow aperture arrays in shielding enclosures - Experiments, FDTD, and MoM modeling

Aperture arrays designed to provide airflow through shielding enclosures ca n provide part of the coupling path from interior sources to external elect romagnetic interference (EMI), In this work, radiation through aperture arr ays is investigated numerically and experimentally, FDTD modeling is compar ed with measurements on aperture arrays in a test enclosure. The method of moments (MoM) is also utilized to study radiation from apertures and to inv estigate the mutual coupling between apertures in an infinite conducting pl ane. A simple design equation for the relation between aperture size and nu mber and shielding effectiveness is proposed.