金属栅网对线极化电磁波的屏蔽效能研究
Study on the Shielding Effectiveness of Metal Mesh to Linear
Polarized Electromagnetic Wave
摘要 建立了平面波垂直入射无限大金属栅网的传输线模型,理论分析了无限长窄缝和孔缝对不同线极化电磁波的传输特性,并用电磁仿真软件进行了验证。结果表明,长缝对不同线极化的电磁波屏蔽效能截然不同,缝长是影响屏蔽效能的关键因素,在屏蔽体上开孔缝要比
开长缝能更好地起到屏蔽作用,并且孔径越小,屏蔽效能越好。
关键词 金属栅网;屏蔽效能;缝隙;极化;传输线模型
Abstract The transmission line model of an infinite metal mesh, which is uprightly
irradiated by plane wave, is built. The transmission characteristics of different linear
polarized waves through hole and infinite long narrow aperture are also analyzed in
theory. And then,the model is validated by EM simulation software.Eventually,the fact
that long aperture have completely different kinds of shielding effectiveness to
different linear polarized wave is pointed out. The length of aperture is a key factor to
influence the shielding effectiveness, so it is better to open holes rather than long
aperture on shielding enclosure. Moreover,the smaller radius of the holes is,the better
shielding effectiveness would be.
Keywords metal mesh; shielding effectiveness; aperture; polarization; transmission
line model
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