摘要
设计了一个在微波频段对极化不敏感的超材料吸波体。该超材料微观单元由4个互相垂直的电谐振环和短导线构成,这种结构克服了Landy提出的结构对电磁波极化敏感的缺点,对垂直极化和水平极化电磁波都有很好的吸收效果。采用数值仿真方法,在12~18 GHz波段提取了这种超材料的S参数,计算了其吸波率。单层超材料吸波体在14 GHz处达到吸波峰,吸波率达57.4%;多层组合吸波体在15 GHz处吸波率峰值达到87.6%。
A polarization insensitive metamaterial absorber for microwave frequency is designed in this paper. The composite metamaterials consist of four mutually perpendicular electric ring resonators(ERR) and short wire structures. The structure is polarization insensitive. Therefore it can absorb the arbitrarily polarizaed electromagnetic waves. By use of the numerical simulation method, the S parameters are calculated. The absorbance A(w) in 12-18 GHz range is obtained. The peak A(w) is more than 57.4% at 14.0 GHz, and the multi-layer metamaterial assembly absorbance peak value is about 87. 6% at 15 GHz.
出处
《光学与光电技术》
2010年第4期83-86,共4页
Optics & Optoelectronic Technology
基金
湖北省教育厅科技研究计划中青年人才(Q20081405)资助项目
关键词
电磁波极化
吸波体
超材料
electromagnetic wave polarizations
absorber
metamaterial