基于各向异性织物的电磁屏蔽性能仿真计算
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摘要
为实现电磁织物的屏蔽效能理论预测及优化设计,对电磁屏蔽织物构建了三维模型,用CST微波工作室模拟各向异性织物与电磁波相互作用的机理。计算了在1～18 GHz波段内,电磁波入射角和方位角对屏蔽效能的影响。结果表明:x轴和y轴方向介电常数对织物屏蔽效能的影响较为显著,且在各向异性介电常数较小时,屏蔽效能随电磁波入射角的增加呈现先增大后减小;而当电磁波方位角发生变化时,不同电磁波入射角对其产生的屏蔽效能影响规律不同。本研究结果对各向异性织物具有较好的适用性,为开发高性能电磁屏蔽织物提供理论依据。
A 3 D model of electromagnetic shielding fabric was constructed for the prediction of shielding effectiveness and optimization. The process of the fabric and electromagnetic wave interaction was simulated by using CST microwave studio. The effect of electromagnetic wave incident angle and azimuth on shielding effectiveness was calculated in the 1～18 GHz band. The result showed that dielectric constant of X axis and Y axis had a significant effect on the shielding effectiveness. When the dielectric constant was small, the shielding effectiveness increased first and then decreased with the increase of the incident angle of electromagnetic wave. When the azimuth of electromagnetic wave changed, the incident angle of different electromagnetic waves had different effects on shielding effectiveness. This study had universal applicability, and provided a theoretical basis for the development of high performance shielding fabric.
A 3 D model of electromagnetic shielding fabric was constructed for the prediction of shielding effectiveness and optimization. The process of the fabric and electromagnetic wave interaction was simulated by using CST microwave studio. The effect of electromagnetic wave incident angle and azimuth on shielding effectiveness was calculated in the 1～18 GHz band. The result showed that dielectric constant of X axis and Y axis had a significant effect on the shielding effectiveness. When the dielectric constant was small, the shielding effectiveness increased first and then decreased with the increase of the incident angle of electromagnetic wave. When the azimuth of electromagnetic wave changed, the incident angle of different electromagnetic waves had different effects on shielding effectiveness. This study had universal applicability, and provided a theoretical basis for the development of high performance shielding fabric.
引文
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[2]LIU Dawei,HUANG Jun,SONG Lei.Influence of aircraft surface distribution on electromagnetic scattering characteristics[J].Chinese Journal of Aeronautics,2017(30):759-765.
[3]SAINI Parveen,ARORA Manju,GUPTA.High permittivity polyaniline-barium titanate nanocomoposites with excellent electromagnetic interference shielding response[J].Nano Res.,2013(5):4 330-4 336.
[4]SONG Qinghua,ZHANG Wu,WU Pinchieh.Waterresonator-based metasurface:an ultrabroadband and near-unity absorption[J].Adv.Opt.Mater.,2017(3).DOI:10.1002/adom.201601103.
[5]YIN Xiaowei,KONG Luo,ZHANG Litong.Electromagnetic properties of Si-C-N based ceramics and composites[J].Int.Mater.Rev.,2014(59):326-355.
[6]CAKICI M,KAKARLA R R.Advanced electrochemical energy storage supercapacitors based on the flexible carbon fiber fabric-coated with uniform corallike MnO2 structured electrodes[J].Chem.Eng.J.,2017(309):151-158.
[7]CHEN H C,LEE K C,LIN J H,et al.Fabrication of conductive woven fabric and analysis of electromagnetic shielding via measurement and empirical equation[J].Journal of Materials Processing Technology,2007,184(1-3):124-30.
[8]苏钦城,赵晓明,李卫斌,等.基于有限积分法的机织物电磁屏蔽效能仿真分析[J].纺织学报,2016(2):155-160.
[9]肖红,施楣梧,钞杉,等.机织物有效结构模型的电磁屏蔽效能影响因素[J].纺织学报,2015(7):42-49.
[10]OZDEMIR H,URLU U S,OZKURT A.The electromagnetic shielding of textured steel yarn based woven fabrics used for clothing[J].Journal of Industrial Textiles,2015(10):1-21.
[11]杨冉冉,顾兆栴.磁性涂层碳纤维各向异性铺层板的反射率计算[J].宇航材料工艺,2014(5):16-19.
[12]罗杰,须萍.基于传输矩阵法讨论光疏介质表面的全反射[J].大学物理,2011,30(10):52-54.
[13]秦卫平,方大纲.有限元法结合周期边界条件分析介质光栅衍射[J].电波科学学报,2001(4):479-483.
[14]葛德彪,魏兵.电磁波理论[M].北京:科学出版社,2011.