随机分布频率选择表面对材料电磁波吸收性能影响的实验研究

Experimental Studies on the Reflectivity of Absorbing Materials with Random Distributed FSS

摘要: 研究了由随机分布的电阻薄膜构成的频率选择表面(FSS)对复合材料电磁波吸波性能的影响。讨论了FSS中电阻薄膜的表面占有率,电阻薄膜的面分布状态以及电阻薄膜的面电阻等因素对材料反射率变化的作用。实验结果表明,在复合材料中加入适当表面占有率的FSS可以显著地提高复合材料在频率低端的吸收效果。具有非对称分布形态的FSS比对称分布的FSS能更好地改进复合材料的吸收性能,同时吸收性的改进也和导电膜的表面电阻有关。

Abstract: In this paper,frequency selective surfaces(FSS) with random distributed resistive film patch has been proposed,and the effects on composite absorbing material with the FSS have been studied.The occupancy,distribution and surface resistance of the film patches,and their contribution to the reflectivity have been studied experimentally.The results show that the reflectivity in the low frequencies could be improved greatly when the FSS with suitable surface percentage of patch is used.The performance of FSS with asymmetry distribution is better than that with the symmetrical distribution.Meanwhile,surface resistances of the patch also has the impacts on the reflectivity of the composite.