A tunable metamaterial absorber using varactor diodes
A tunable metamaterial absorber using varactor diodes
复制标题
使用变容二极管的可调谐超材料吸收器
DOI：
10.1088/1367-2630/15/4/043049
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发表时间：
2013-04-26
影响因子：
3.3
通讯作者：
Cui, Tie Jun
中科院分区：
文献类型：
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作者：
Zhao, Jie;Cheng, Qiang;Cui, Tie Jun
我们提出了一种偏振不敏感的可调谐超材料吸收器的设计，分析和测量变容二极管嵌入超材料单元之间。基本单元在设计的频带内在很宽的入射角范围内显示出优异的吸收率。通过调节变容二极管上的反向偏置电压，可以连续控制所设计单元的吸收频率。用电磁波干涉理论解释了吸收机理。当超材料单元沿沿着两个正交方向放置时，吸收体对入射波的偏振不敏感。实验结果验证了该吸收体的可调谐性，测量带宽为1.5GHz（或相对带宽为30%）。
We present the design, analysis and measurements of a polarization-insensitive tunable metamaterial absorber with varactor diodes embedded between metamaterial units. The basic unit shows excellent absorptivity in the designed frequency band over a wide range of incident angles. By regulating the reverse bias voltage on the varactor diode, the absorption frequency of the designed unit can be controlled continuously. The absorption mechanism is interpreted using the electromagnetic-wave interference theory. When the metamaterial units are placed along two orthogonal directions, the absorber is insensitive to the polarization of incident waves. The tunability of the absorber has been verified by experimental results with the measured bandwidth of 1.5 GHz (or relative bandwidth of 30%).