材料科学
电阻式触摸屏
超材料吸收剂
光电子学
光学
超材料
选择性表面
反射损耗
吸收(声学)
阻抗匹配
欧姆接触
导电体
电阻抗
图层(电子)
复合材料
可调谐超材料
复合数
物理
电气工程
工程类
作者
Shijun Ji,Hailin Ren,Chenguang Zhang,Ji Zhao,Han Wu,Handa Dai
标识
DOI:10.1088/1361-6463/ace6b2
摘要
Abstract An optically transparent metamaterial absorber with polarization insensitivity and wide-angle absorption is proposed. The absorber, which consists of an indium tin oxide resistive film and a low-loss substrate, is optically transparent and conformal. By tuning the reflection response of the frequency-selective surface and the thickness of the spacer layer, the whole structure achieves an absorption of more than 97% in the range of 6.54–18.66 GHz. Numerical simulation results show that the absorber can still maintain an absorption rate of more than 85% in a wide range of oblique incidence angles from 0° to 60°. In addition, the intrinsic physical mechanism of the absorber is elucidated using the impedance matching theory and the distribution of surface currents. The ratio of dielectric loss and ohmic loss is also quantitatively analyzed. Finally, the reflection and transmission coefficients of the sample were measured in a microwave anechoic chamber, which showed a good agreement with the simulation results. This design uses a low-resistivity resistive film as a frequency-selective surface, which was rarely involved in previous studies, and provides a new idea for future design and application.
科研通智能强力驱动
Strongly Powered by AbleSci AI