Zhang Cheng, Yin Sheng, Long Chang, Dong Bo Wen, He Daping, Cheng Qiang
Opt Express. 2021 Apr 26;29(9):14078-14086. doi: 10.1364/OE.423245.
Developing high-efficiency microwave absorbers remains challenging in the broadband range, particularly in the low-frequency range containing the L band and even lower. To overcome this challenge, a hybrid metamaterial absorber comprising a conventional magnetic absorbing material and a multi-layered meta-structure predesigned with graphene films is proposed to realize wideband absorption performance starting from ultra-low frequencies (0.79-20.9 GHz and 25.1-40.0 GHz). The high absorption ability of the proposed device originates from fundamental resonance modes and their coupling. The experimental results agree well with the simulated ones, proving the effectiveness of our design method. In addition, owing to the use of low-density polymethylacrylimide foam and graphene films with outstanding mechanical properties, our design is lightweight and environmentally adaptable, which reflects its engineering value.
开发高效的微波吸收器在宽带范围内仍然具有挑战性，特别是在包含L波段甚至更低频率的低频范围内。为了克服这一挑战，提出了一种由传统磁性吸收材料和预先设计有石墨烯薄膜的多层超结构组成的混合超材料吸收器，以实现从超低频（0.79 - 20.9 GHz和25.1 - 40.0 GHz）开始的宽带吸收性能。所提出器件的高吸收能力源于基本共振模式及其耦合。实验结果与模拟结果吻合良好，证明了我们设计方法的有效性。此外，由于使用了低密度聚甲基丙烯酰亚胺泡沫和具有出色机械性能的石墨烯薄膜，我们的设计重量轻且环境适应性强，体现了其工程价值。
