中国物理B ›› 2015, Vol. 24 ›› Issue (10): 104101-104101.doi: 10.1088/1674-1056/24/10/104101

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Reciprocity principle-based model for shielding effectiveness prediction of a rectangular cavity with a covered aperture

焦重庆, 李月月   

  1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
  • 收稿日期:2015-03-13 修回日期:2015-04-12 出版日期:2015-10-05 发布日期:2015-10-05
  • 基金资助:
    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).

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)   

  1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
  • Received:2015-03-13 Revised:2015-04-12 Online:2015-10-05 Published:2015-10-05
  • Contact: Jiao Chong-Qing E-mail:cqjiao@ncepu.edu.cn
  • Supported by:
    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).

RichHTML

0

PDF (PC)

287

赞

摘要： 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.

关键词: electromagnetic shielding, electromagnetic leakage, apertured cavity, conductive material

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.

Key words: electromagnetic shielding, electromagnetic leakage, apertured cavity, conductive material

中图分类号:  (Applied classical electromagnetism)

  • 41.20.-q
41.20.Jb (Electromagnetic wave propagation; radiowave propagation) 84.32.-y (Passive circuit components)