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Abstract
The power balance technique for the prediction of shielding effectiveness of reverberant enclosures is fast and simple to use. However, it assumes a uniform field in the enclosure, which has been shown to be incorrect in the presence of dissipative contents. The diffusion model is a generalization of the power balance method that can account for the field inhomogeneity due to the presence of losses with much lower computational effort than a full wave solver. Evaluation of a 2D diffusion model produced promising results compared to physical measurements. Here we present a 3D diffusion model applied to an enclosure with an aperture and dissipative contents. Comparisons between the 3D diffusion model, measurements and a full wave solver suggest that it is able to account for the variation of the electromagnetic field due to dissipative contents with far less computational effort than full wave solvers. The diffusion model allows rapid solution of the shielding effectiveness of enclosures with dissipative contents and arbitrary geometries. and reduces the time to model equipment enclosures from hours to minutes, whilst still determining the variation of field strength due to contents. In addition, the method may help predict field inhomogeneity in reverberation chambers.
Original language | English |
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Pages (from-to) | 1362-1369 |
Number of pages | 8 |
Journal | IEEE Transactions on Electromagnetic Compatibility |
Volume | 61 |
Issue number | 4 |
Early online date | 30 May 2019 |
DOIs | |
Publication status | Published - 1 Aug 2019 |
Bibliographical note
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Keywords
- Electromagnetic shielding
- reverberation chamber (RC)
- power balance method
- Diffusion model
- shielding effectiveness (SE)
- shielding effectiveness of enclosures
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Electromagnetic shielding properties of Materials, and Enclosures
Dawson, J. F., Marvin, A., Flintoft, I. D., Dawson, L., Porter, S. J., Robinson, M. P. & Yan, J.
1/01/90 → …
Project: Other project › Miscellaneous project
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Shielding Measurement of Electrically Large Enclosures with Contents
Marvin, A., Dawson, J. F., Robinson, M. P., Bale, S. J., Flintoft, I. D., Parker, S. & Yan, J.
1/09/14 → 31/08/16
Project: Research project (funded) › Research