Planar isotropic broadband metamaterial absorber
Planar isotropic broadband metamaterial absorber
复制标题
平面各向同性宽带超材料吸收器
DOI：
10.1063/1.4826911
复制
发表时间：
2013-10-28
影响因子：
3.2
通讯作者：
Zhao, Xiaopeng
中科院分区：
文献类型：
--
作者：
Gu, Shuai;Su, Bin;Zhao, Xiaopeng
本文提出了一种各向同性宽带超材料吸收体，由单层密集排列的不同尺寸的六边形金属树枝状单元组成，印刷在具有金属薄膜涂层的 FR-4 介电基板上。不同尺寸单元的不同相邻谐振频率的收敛产生宽带吸收特性。在垂直入射的情况下，工作在 X 波段的吸收体在 9.05GHz 至 11.4GHz 的频率范围内产生大于 80% 的吸收率，对于小于 45° 的倾斜入射也能保持这种合理的吸收性能。 S波段吸收体在3.02 GHz至4GHz频率范围内的吸收率超过50%。实验结果表明不同结构单元之间的相互作用并不明显。
This paper presents a type of isotropic broadband metamaterial absorber comprising single-layer densely arranged hexagonal metal dendritic units having different sizes printed on an FR-4 dielectric substrate with a metallic film coating. The convergence of the different neighboring resonant frequencies of the differently sized units yields broadband absorption characteristics. In the case of normal incidence, the absorber operating in the X-band yields absorption rates greater than 80% in the frequency range from 9.05 GHz to 11.4 GHz, this reasonable absorption performance is maintained for oblique incidences less than 45°. The S-band absorber has an absorptivity of more than 50% in the frequency range from 3.02 GHz to 4 GHz. The experimental results demonstrate that the interaction between the different structural units is not obvious.