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

Author

Li, Min ; Nuebel, Joe ; Drewniak, James L. ; Dubroff, Richard E. ; Hubing, Todd H. ; Van Doren, Thomas P.

Author_Institution

Missouri Univ., Rolla, MO, USA

Volume

42

Issue

3

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

265

Lastpage

275

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

Keywords

electromagnetic coupling; electromagnetic fields; electromagnetic interference; electromagnetic shielding; finite difference time-domain analysis; integral equations; method of moments; packaging; EM radiation; EMI; FDTD; MoM modeling; airflow aperture arrays; aperture number; aperture size; coupling path; design equation; electromagnetic interference; experiments; infinite conducting plane; integral equation; measurements; method of moments; mutual coupling; radiated fields; shielding effectiveness; shielding enclosures; test enclosure; Apertures; Electromagnetic coupling; Electromagnetic interference; Electromagnetic measurements; Equations; Finite difference methods; Moment methods; Mutual coupling; Testing; Time domain analysis;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.865333

Filename

865333