一种基于超材料的吸波材料的设计与制备  

Design and preparation of a radar-absorbing material based on metamaterial

作　　者：孙良奎[1] 程海峰[1] 周永江[1] 王军[1] 庞永强[1] 

机构地区：[1]国防科技大学航天与材料工程学院,新型陶瓷纤维及其复合材料国防科技重点实验室,长沙410073

出　　处：《物理学报》2011年第10期750-754,共5页Acta Physica Sinica

摘　　要：设计了一种基于超材料的吸波材料,吸波材料由周期性排列的电阻片,基体以及金属背底构成.采用时域有限差分法(FDTD)计算了吸波材料的反射率,并用遗传算法优化了吸波材料的吸波带宽,得到一种反射率在8—18GHz小于-10dB的吸波材料,材料厚度仅为3mm.采用手糊工艺制备了空心石英纤维增强环氧树脂基体,丝网印刷制备了电阻片,实现了所设计的吸波材料,测试表明,实验结果和设计结果一致.A kind of radar-absorbing material（RAM） based on metamaterial,which contains resistive patches,dielectric substrate and metal backing,is designed.The reflectivity of the RAM is calculated using the finite difference time-domain method（FDTD） and optimized by genetic algorithm（GA）.Then RAMs with a reflectivity bandwidth of 8—18 GHz below-10 dB is obtained.Moreover,its thickness is only 3mm.To confirm the design results,the RAM is prepared by fabricating a hollow quartz fibre reinforced epoxy resin substrate through using hand lay-up process and making the resistive patches by screen painting.The reflectivity of the absorber is measured,showing that the experimental result is consistent with the design value.

关 键 词：雷达吸波材料 超材料 频率选择表面 遗传算法 

分 类 号：TB34[一般工业技术—材料科学与工程]