摘要
为了降低物体的雷达散射截面,实现对电磁波的吸收,利用超材料的电磁特性,设计了一款多频复合结构超材料吸波器。通过改变超材料的等效介电常数和磁导率,在空气中实现了吸波器与电磁波阻抗的匹配,并将电磁波束缚在器件内部转化为热能。仿真结果表明,该吸波器在3.68、5.96、8.45GHz频点电磁波的吸收率分别为99.9%、97%、99.5%,对不同的电磁波极化方向呈现不敏感性,同时在电磁波宽角度入射时仍具有较高的吸收率,其厚度远低于传统的吸波材料。
In order to reduce the radar cross section of the object and realize the absorption of electromagnetic waves,a multiband composite structure metamaterial absorber is designed based on special electromagnetic properties of metamaterial.Effective permittivity and permeability are changed to achieve the impedance matching between absorber and electromagnetic waves in the air,meanwhile,the electromagnetic waves are bounded within the device and converted into thermal energy.The simulation results show that the absorption rates of the proposed absorber respectively are 99.9%,97%,99.5% at3.68,5.96,8.45 GHz.The absorber is insensitive with different polarization directions of electromagnetic waves and the high absorption rate is achieved while the electromagnetic waves have a wide range incidence angle.The absorber is much thinner than the traditional absorbing material.
出处
《桂林电子科技大学学报》
2015年第1期1-5,共5页
Journal of Guilin University of Electronic Technology
基金
国家自然科学基金(61461016)
广西自然科学基金(2014GXNSFAA118366)
桂林电子科技大学研究生教育创新计划(GDYCSZ201408)
关键词
超材料吸波器
多频
复合结构
metamaterial absorber
multi-band
composite structure
