EMI from Airflow Aperture Arrays in Shielding Enclosures-Experiments, FDTD, and MoM Modeling

Min Li
J. Nuebel
James L. Drewniak, Missouri University of Science and Technology
Richard E. DuBroff, Missouri University of Science and Technology
Todd H. Hubing, Missouri University of Science and Technology
Thomas Van Doren, Missouri University of Science and Technology

This document has been relocated to http://scholarsmine.mst.edu/ele_comeng_facwork/1587

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Abstract

Aperture arrays designed to provide airflow through shielding enclosures can provide part of the coupling path from interior sources to external electromagnetic interference (EMI). In this work, radiation through aperture arrays is investigated numerically and experimentally. FDTD modeling is compared with measurements on aperture arrays in a test enclosure. The method of moments (MoM) is also utilized to study radiation from apertures and to investigate the mutual coupling between apertures in an infinite conducting plane. A simple design equation for the relation between aperture size and number and shielding effectiveness is proposed