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1998•IEEE Transactions on Electromagnetic CompatibilityOpen access

Analytical formulation for the shielding effectiveness of enclosures with apertures

Martin P. Robinson, T.M. Benson, C. Christopoulos, J.F. Dawson, M.D. Ganley, A.C. Marvin, S.J. Porter, D.W.P. Thomas

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Abstract

An analytical formulation has been developed for the shielding effectiveness of a rectangular enclosure with an aperture. Both the magnetic and electric shielding may be calculated as a function of frequency, enclosure dimensions, aperture dimensions and position within the enclosure. Theoretical values of shielding effectiveness are in good agreement with measurements. The theory has been extended to account for circular apertures, multiple apertures, and the effect of the enclosure contents.

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What this paper is about

An analytical formulation has been developed for the shielding effectiveness of a rectangular enclosure with an aperture. Both the magnetic and electric shielding may be calculated as a function of frequency, enclosure dimensions, aperture dimensions and position within the enclosure. Theoretical values of shielding effectiveness are in good agreement with measurements. The theory has been extended to account for circular apertures, multiple apertures, and the effect of the enclosure contents.

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Available abstract

An analytical formulation has been developed for the shielding effectiveness of a rectangular enclosure with an aperture. Both the magnetic and electric shielding may be calculated as a function of frequency, enclosure dimensions, aperture dimensions and position within the enclosure. Theoretical values of shielding effectiveness are in good agreement with measurements. The theory has been extended to account for circular apertures, multiple apertures, and the effect of the enclosure contents.

Key concepts: Enclosure, Electromagnetic shielding, Aperture (computer memory), Optics, Position (finance), Acoustics, Physics, Materials science

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