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基于电偶极共振的极化独立宽带吸收超材料
陈 晨, 田丽华
中国电子科技集团第三十八研究所 博微太赫兹信息科技有限公司,安徽 合肥 230088
摘要:
基于电偶极共振设计了一种工作在W波段、对极化不敏感的宽带吸收超材料。宽带吸波超材料基于不同尺寸铜箔排列构成的周期阵列,在结构上高度对称。通过时域有限差分算法,对超材料在W波段的吸收性能进行仿真,通过电场和电荷分布探讨了导致共振吸收的物理机制。最后,利用印制电路板工艺加工实现了设计的超材料结构,并给出关于吸收性能的仿真与实验结果的对比。实验结果表明,超材料在W波段平均吸收率达到84.7%,与仿真结果接近。
关键词:  超材料  完美吸收  极化
DOI:10.11805/TKYDA2019307
分类号:
基金项目:
Polarization-insensitive broadband metamaterial absorber based on electric dipole resonance
CHEN Chen, TIAN Lihua
Brainware Terahertz Information Technology Co.,Ltd,The No. 38 Institute,CETC,Hefei Anhui 230088,China
Abstract:
Based on electric dipole resonance, a polarization-insensitive broadband metamaterial absorber in W-band is designed. The broadband metamaterial with highly symmetric structure, is composed of the periodic arrays of copper with different sizes. Absorption performance of metamaterial in W band is simulated by Finite Difference Time Domain(FDTD) method, and the physical mechanism of resonance absorption is discussed through electric field and charge distribution. The metamaterial is implemented by Printed Circuit Board(PCB), and the experimental results of absorption are compared with simulation. Experimental results show that the average absorption rate of the metamaterial in W band reaches 84.7%, which is close to the simulation results.
Key words:  metamaterial  perfect absorption  polarization

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