一种基于超材料的极化无关超宽带吸波器  

A metamaterial-based urltrawideband absorber with polarizagion independent

作　　者：杨曙辉[1,2] 陈迎潮 王文松[2,3] 康劲[1] 贺学忠[4] 

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100101 [2]南卡罗莱纳大学电气工程系,哥伦比亚美国sc29208 [3]南京航空航天大学电子信息工程学院,南京210016 [4]北卡罗莱纳大学格林斯堡分校文理学院,格林斯堡美国nc27412

出　　处：《电波科学学报》2015年第5期834-841,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61171039)

摘　　要：提出了一种新的基于氮化钽金属膜和多孔泡沫介质的具有超宽带吸收特性的超材料吸波器.吸收率大于80%的频段为15.5~47.2GHz（在18.3GHz,达到最大吸收率99.89%）,相对带宽约为101%,完全覆盖了K波段、Ka波段,部分覆盖了U波段.对于斜入射的横电波、横磁波具有较宽角度的吸波性能.由于吸波单元的金属图案设计为5个同心圆环结构,具有全向旋转对称性,因而是极化无关的.该吸波器结构简单.容易制作,在电磁隐身、电磁兼容等领域具有重要应用价值.A new type of metamaterial absorber with ultra wideband absorbing performance which is based on metal film of tantalum nitride and porous foam is proposed.The frequency band of which absorbance is more than 80% range from 15.5 GHz to 47.2GHz（the maximum absorbility achieves 99.89%at 18.3GHz）.The relative bandwidth is approximate of 101% and the operating frequency fully covers the K-band and Kaband and partly U-band.For the oblique incidence electromagnetic wave of TE mode and TM mode,the absorber exhibits the absorbing property of wide angle.Due to the metal pattern in the metamaterial absorbing cell composed of five concentric rings with omnidirectional rotation symmetry,the absorber possesses excellent polarization indepe-ndent characteristics.The presented absorber has the advantages of simple structure,easy fabrication,thus it has important application value in the fields of electromagnetic stealth and electromagnetic compatibility.

关 键 词：超材料吸波器 超宽带 极化无关 电磁谐振 

分 类 号：O441.4[理学—电磁学]