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Reciprocity principle-based model for shielding effectiveness prediction of a rectangular cavity with a covered aperture |
| Jiao Chong-Qing (焦重庆), Li Yue-Yue (李月月) |
| State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China |
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Abstract According to the reciprocity principle, we propose an efficient model to compute the shielding effectiveness of a rectangular cavity with apertures covered by conductive sheet against an external incident electromagnetic wave. This problem is converted into another problem of solving the electromagnetic field leakage from the cavity when the cavity is excited by an electric dipole placed within it. By the combination of the unperturbed cavity field and the transfer impedance of the sheet, the tangential electric field distribution on the outer surface of the sheet is obtained. Then, the field distribution is regarded as an equivalent surface magnetic current source responsible for the leakage field. The validation of this model is verified by a comparison with the circuital model and the full-wave simulations. This time-saving model can deal with arbitrary aperture shape, various wave propagation and polarization directions, and the near-field effect.
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Received: 13 March 2015
Revised: 12 April 2015
Accepted manuscript online:
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PACS:
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41.20.-q
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(Applied classical electromagnetism)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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84.32.-y
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(Passive circuit components)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51307055) and in part by the State Grid Corporation of China (Grant No. No. SGRI-WD-71-12-009). |
Corresponding Authors:
Jiao Chong-Qing
E-mail: cqjiao@ncepu.edu.cn
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Cite this article:
Jiao Chong-Qing (焦重庆), Li Yue-Yue (李月月) Reciprocity principle-based model for shielding effectiveness prediction of a rectangular cavity with a covered aperture 2015 Chin. Phys. B 24 104101
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