摘要
仿真并实验验证了基于电磁谐振的极化无关透射吸收超材料吸波体,该吸波体可以实现低频透射和高频吸收.实验测试结果表明,该吸波体在6.77GHz吸收率峰值为83.6%,半功率带宽为4.3%,实现窄带强吸收.为进一步拓展该谐振型超材料吸波体的吸收带宽,利用其低频透射特性,将两个工作于不同频段的吸波体叠加在一起,测试结果表明,复合后超材料吸波体的半功率带宽可以增大到10.9%,吸收率也略有增强.该超材料吸波体设计简单,具有较强的实用性和应用前景.
In this paper, we simulate and experimentally validate a polarization-independent transmission absorption metamaterial absorber based on electromagnetic resonance. The metamaterial absorber can absorb the high-frequency electromagnetic wave, and the low- frequency wave can transmit through the absorber. The tested results indicate that the metamaterial absorber can achieve a narrow bandwidth high absorption with a peak absorption of 83.6% at 6.77 GHz, and a full width at half maximum （FWI-IM） of 4.3%. To further broaden the absorption bandwidth of the resonant metamaterial absorber, we place two absorbers with different working frequencies together for its low-frequency transmitted characteristic. The measured data show that the composite metamaterial absorber can increase the FWHM to 10.9%, and can enhance the absorption slightly. The metamaterial absorber has some advantages, such as simple design, strong practicability, and important application foreground.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第10期115-120,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:11274389
61071058
11204378)
国家重点基础研究发展计划(批准号:2009CB623306)资助的课题~~
关键词
极化无关
透射吸收
超材料吸波体
polarization-independent, transmission absorption, metamaterial absorber
