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- W17115952 abstract "This topic discusses and verifies an equation for estimating the shielding effectiveness of metallic enclosures through the use of numerical simulations. Using ideas from Bethe’s “Theory of Diffraction by Small Holes” [5], a previous student from the Missouri S&T Electromagnetic Compatibility Laboratory developed an equation that would yield an envelope prediction for the worst-case EMI from an aperture array backed by an over-moded cavity. In [1-4], Min Li (PhDEE ’99) used results from measurements, simulations, and physics-based equations to formulate a simple equation that would predict these EMI levels. The main purpose of this thesis is to revisit this work and determine when and why this prediction fails, if at all. Broadband FDTD simulations are used to first evaluate several simple models of aperture arrays in an infinite PEC sheet. With a sound understanding of this scenario, the simulations are then extended to the more realistic PEC enclosures. In the end, the shielding effectiveness of aperture arrays excited by both uniform plane waves at normal incidence and over-moded cavities can be predicted to within 3dB, so long as the dimensions of the apertures remain less than λ/6." @default.
- W17115952 created "2016-06-24" @default.
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- W17115952 date "2011-01-01" @default.
- W17115952 modified "2023-09-27" @default.
- W17115952 title "Characterization of shielding effectiveness for metallic enclosures" @default.
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