织物屏蔽效能的法兰同轴法和屏蔽室法测试对比研究

纺织学报 ›› 2016, Vol. 37 ›› Issue (3): 47-54.

织物屏蔽效能的法兰同轴法和屏蔽室法测试对比研究

收稿日期:2015-03-31 修回日期:2015-09-22 出版日期:2016-03-15 发布日期:2016-03-16

Comparative research on electromagnetic shielding effectiveness of fabric tested by flange coaxial method and shielding chamber method

Received:2015-03-31 Revised:2015-09-22 Online:2016-03-15 Published:2016-03-16

摘要/Abstract

摘要：

为研究不锈钢织物的屏蔽效能，采用法兰同轴法（30 MHz～1.5 GHz）和屏蔽室法（1～18 GHz、18～26.5 GHz），对样品的屏蔽效能进行了对比测试研究。结果表明，2种不同测试方法和条件下，电磁波的电场分量和磁场分量在样品平面分布显著不同，屏蔽室法可以清晰反映出各向异性织物的电磁屏蔽效能的方向性，而法兰同轴法则不能。法兰同轴测试时，对应的电磁波长较长，导致同样尺寸的金属纱线排列间距和缝隙孔洞对屏蔽效能的影响不如屏蔽室法明显。只有经、纬向具有同样的金属纱线排列间距、电性能宏观各向同性的电磁屏蔽织物，在两种测试方法下才遵循同样的规律性，且也是经济、有效的应对未知方向电磁波的最佳结构形式。

关键词: 法兰同轴法, 屏蔽室法, 屏蔽效能, 各向异性

Abstract:

The electromagnetic shielding effectiveness of a series of stainless fabrics are tested by the Flange coaxial method(30 MHz～1.5 GHz) and the shielding chamber method(1～18 GHz,18~26.5 GHz). Under the two different testing methods, the distribution of the electric field component and the magnetic field component on the sample surface is obviously difference. The shielding chamber method could reflect the directivity of the anisotropy fabrics and the Flange coaxial method could not. Because the electromagnetic wave length is longer in the Flange coaxial method, the same metal fiber distance and the aperture of the same size would affect the electromagnetic shielding effectiveness tested with the Flange coaxial less than with the shielding chamber method. Only the electromagnetic shielding fabrics, with the same metal arrangement spacing in the warp and weft yarn, with macro isotropic electric properties, would follow the same regularity tested with two kinds of test methods, and also is the economic and effective optimum structure form to the unknown direction electromagnetic waves.

Key words: flange coaxial method, shielding chamber method, shielding effectiveness, anisotropy

肖红唐章宏施楣梧王群. 织物屏蔽效能的法兰同轴法和屏蔽室法测试对比研究[J]. 纺织学报, 2016, 37(3): 47-54.

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