隐身技术对降低目标RCS和提高其生存能力具有重要意义，而在目标表面共形吸波器结构是一种重要隐身手段。本项目基于石墨烯研究超宽带的太赫兹吸波器，对增强目标在未来太赫兹雷达系统下的隐身性能具有重要的科学意义。1）利用石墨烯设计多层或局部非周期结构，开展超宽带太赫兹吸波器电磁建模——构建的吸波器可直接覆盖超宽频带，也可对该超宽频带内任意特定频率进行重点吸收，且具有对极化不敏感和便于与目标共形的特点；2）研究吸波机理及分析方法——推导新的传播矩阵法，形成一种分析平面型吸波器通用的理论方法，并结合多谐振、空间阻抗匹配及干涉等原理揭示构建的吸波器超宽带吸波机理；3）吸波性能验证实验研究——基于太赫兹时域光谱系统对吸波器超宽带性能进行实验测试，并与模拟仿真、理论方法等结果对比，验证结果的可靠性。通过系列研究，形成基于石墨烯的超宽带太赫兹吸波器研究的完整体系，为未来太赫兹波段隐身目标设计开辟一条科学途径。

Stealth technology is of great importance and values in reducing the radar cross section and improving the survivability of the target aircraft. Absorber is one of the most important structures in stealth technology. In order to enhance the stealth capability of the target in feature terahertz (THz) radar systems, this project plans to study the ultra-wideband (UWB) THz absorbers based on graphene in three aspects: 1) the research on the UWB THz absorbers electromagnetic modeling, which is developed by multi-layered or local non-periodic graphene. These absorbers can cover over ultra wide frequency band directly, also they can strongly absorb incoming wave at any frequency in the range of the ultra wide frequency band. Furthermore, these absorbers have the advantages of insensitivity to the polarization of the incident wave and easy to form the targets; 2) the derivation of the new propagation matrix method and the reveal of the absorption mechanism. The mechanism of the constructed absorbers is revealed by multi-resonance theory, interference theory and spatial impedance matching theory, which are calculated analytically by a universal theoretical method of the proposed propagation matrix algorithm; 3) the experimental research on verification based on THz-TDS. The results of measurement, simulation and theoretical method are compared and analyzed, and then the reliability of research is verified. The ultimate aim is to construct an organic system of the study on the UWB THz absorber based on graphene, which can provide a scientific approach for the future design of stealth target in terahertz band.