Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China.
National Graphene Institute, University of Manchester, Manchester M13 9PL, UK.
Proc Natl Acad Sci U S A. 2023 Feb 28;120(9):e2209807120. doi: 10.1073/pnas.2209807120. Epub 2023 Feb 22.
Since first developed, the conducting materials in wireless communication and electromagnetic interference (EMI) shielding devices have been primarily made of metal-based structures. Here, we present a graphene-assembled film (GAF) that can be used to replace copper in such practical electronics. The GAF-based antennas present strong anticorrosive behavior. The GAF ultra-wideband antenna covers the frequency range of 3.7 GHz to 67 GHz with the bandwidth (BW) of 63.3 GHz, which exceed ~110% than the copper foil-based antenna. The GAF Fifth Generation (5G) antenna array features a wider BW and lower sidelobe level compared with that of copper antennas. EMI shielding effectiveness (SE) of GAF also outperforms copper, reaching up to 127 dB in the frequency range of 2.6 GHz to 0.32 THz, with a SE per unit thickness of 6,966 dB/mm. We also confirm that GAF metamaterials exhibit promising frequency selection characteristics and angular stability as flexible frequency selective surfaces.
自开发以来，无线通信和电磁干扰 (EMI) 屏蔽设备中的导电材料主要由基于金属的结构制成。在这里，我们提出了一种可以替代此类实际电子产品中铜的石墨烯组装膜 (GAF)。基于 GAF 的天线具有很强的抗腐蚀性。GAF 超宽带天线的带宽 (BW) 为 63.3GHz，覆盖频率范围为 3.7GHz 至 67GHz，比铜箔基天线高出约 110%。与铜天线相比，GAF 第五代 (5G) 天线阵列具有更宽的 BW 和更低的旁瓣电平。GAF 的电磁干扰屏蔽效能 (SE) 也优于铜，在 2.6GHz 至 0.32THz 的频率范围内达到 127dB，单位厚度的 SE 为 6,966dB/mm。我们还证实，GAF 超材料作为灵活的频率选择表面表现出有前途的频率选择特性和角度稳定性。
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