Abstract：A complex metallic enclosure generally has some annular apertures based on which an efficient and accurate analytical model has been developed for the shielding effectiveness from an annular apertured cascaded-double metallic rectangular enclosures excited by plane wave out of the shielding enclosure. The electromagnetic fields from the plane wave into the enclosure through the annular apertures which covered by conductive material are calculated by using the dyadic Green’s function and the boundary condition of a sheet with infinite extension against a plane wave of normal incidence, so the shielding effectiveness of the target point is calculated. At the same time the analytical model then is employed to analyze the effect of different factors including the thickness of the covered aperture, the conductivity of the conductive material, the positions of target point and annular apertures , the width of the annular apertures on the shielding effectiveness of the shielding enclosure. Comparison with the full wave simulation software CST (computer simulation technology) has verified the model over a wide frequency band, which can provide the reference for the shielding effectiveness of an annular apertured complex metallic shielding enclosure.
郝建红, 公延飞, 蒋璐行, 范杰清. 开有介质封堵环状孔缝的双金属腔体屏蔽效能的解析研究[J]. 电工技术学报, 2018, 33(1): 131-139.
Hao Jianhong, Gong Yanfei, Jiang Luhang, Fan Jieqing. Analytical Formulation for the Shielding Effectiveness of a Cascaded Double Metallic Enclosures with an Annular Aperture Sealed by Conductive Material. Transactions of China Electrotechnical Society, 2018, 33(1): 131-139.
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2018, Vol. 33 
