An EMI estimate for shielding-enclosure evaluation

Author

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

Author_Institution

Missouri Univ., Rolla, MO, USA

Volume

43

Issue

3

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

295

Lastpage

304

Abstract

A relatively simple, closed-form expression has been developed to estimate the EMI from shielding enclosures due to coupling from interior sources through slots and apertures at the enclosure cavity modes. A power-balance method, Bethe´s (1944) small-hole theory, and empirically developed formulas for the relation between radiation, and slot length and number of slots, were employed to estimate an upper bound on the radiated EMI from shielding enclosures. Comparisons between measurements and estimated field strengths suitably agree within engineering accuracy

Keywords

cavity resonators; electromagnetic coupling; electromagnetic interference; electromagnetic shielding; electromagnetic wave diffraction; Bethe´s small-hole theory; EM coupling; EM diffraction; EMC; EMI estimate; apertures; cavity-mode resonances; closed-form expression; enclosure cavity modes; engineering accuracy; estimated field strengths; interior sources; measurements; power-balance method; radiated EMI; radiation; shielding enclosures; slot length; slots; upper bound; Apertures; Cable shielding; Closed-form solution; Diffraction; Electromagnetic compatibility; Electromagnetic interference; Power engineering and energy; Resonance; Resonant frequency; Upper bound;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.942602

Filename

942602