资源描述:
《电磁缺陷修复材料研究进展》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第28卷第1期中国材料进展Vol.38,No.12009年1月MaterialsChinaJan2009电磁缺陷修复材料研究进展陈海燕,谢建良,周佩珩,陆海鹏,邓龙江*(电子科技大学,国家电磁辐射控制材料工程技术研究中心,四川成都610054)摘要:研究了电磁缺陷修复材料在飞行器边缘、缝隙等表面电磁缺陷散射控制中的应用,阐述了其原理和发展状况。给出了表面电磁缺陷的基本定义,分析了其散射特点,并提出电磁缺陷修复原理及基本方法。电磁缺陷修复材料主要包括用于表面波抑制的磁性材料、用于窄缝隙保证电连续的导电材料和用于边缘散射控制的渐变阻抗材料等三类,本文重点介绍了用于边缘散射控制的渐变阻
2、抗材料。该渐变阻抗材料基于图形渐变频率选择表面的概念,加载于边缘考虑平行极化和垂直极化两种情况,并与边缘锯齿化和未加载情况进行比较。从研究情况来看,经过恰当的材料选取和合理的阻抗梯度设计,渐变阻抗材料可以有效控制边缘散射,并能取得宽带效果。最后展望了渐变阻抗材料在电磁散射及电磁辐射领域的应用前景。关键词:电磁缺陷;渐变阻抗材料;边缘散射;电磁缺陷修复材料中图分类号:TN34文献标识码:A文章编号:1674—3962(2013)01-ResearchDevelopmentofElectromagneticDiscontinuitiesRepairingMaterialsHai-Ya
3、nChen,Jian-LiangXie,Pei-HengZhou,andHai-PengLu,Long-JiangDeng*.(UniversityofElectronicScienceandTechnologyofChina,NationalEngineeringResearchCenterofElectromagneticRadiationControlMaterials,Chengdu,610054,China)Abstract:Thetheory,applicationanddevelopmentofelectromagneticdiscontinuitiesrepair
4、ingmaterialsinscatteringcontrollingofelectromagneticdiscontinuitiessuchasedge,gapsandgrooves,andsteps,aredescribedinthispaper.Thedefinitionandcharacteristicofsurfaceelectromagneticdiscontinuitiesareanalyzed,andthetheoryandmethodsforrepairingelectromagneticdiscontinuitiesarealsoproposed.Electr
5、omagneticdiscontinuitiesrepairingmaterialsincludingmagneticmaterialsforsuppressionofsurfacewave,conductivematerialsforrepairingthenarrowgapsorgrooves,andthetaperedimpedancematerialsforcontrollingedgescatteringarediscussedrespectively,andoneofwhich,thetaperedimpedancematerialsareillustratedpar
6、ticularly.Thetaperedresistivematerialsrealizedbygeometricvariationbasedonfrequency-selectivesurfacesconceptsisdemonstratedhavinggoodsuppressionofedgescatteringfromatriangularmetallicplate.Electromagneticback-scatteringoftheas-preparedtargetfromatriangularplatewithedgetaperedresistivesheetload
7、ingisproposedforbothhorizontalpolarizationandverticalpolarization,andcomparedwiththatfromtheoneofthesameshapebutloadedwithserratedshapingornoneresistivesheetontheedge.Theresultsshowthatthetaperedimpedancematerialscanregulateeffectedgescatteri