Hu Zelong, Xiao Zhuohua, Jiang Shaoqiu, Song Rongguo, He Daping
Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China.
School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel). 2021 Sep 6;14(17):5087. doi: 10.3390/ma14175087.
Flexible electronic devices are widely used in the Internet of Things, smart home and wearable devices, especially in carriers with irregular curved surfaces. Light weight, flexible and corrosion-resistant carbon-based materials have been extensively investigated in RF electronics. However, the insufficient electrical conductivity limits their further application. In this work, a flexible and low-profile dual-band Vivaldi antenna based on highly conductive graphene-assembled films (GAF) is proposed for 5G Wi-Fi applications. The proposed GAF antenna with the profile of 0.548 mm comprises a split ring resonator and open circuit half wavelength resonator to implement the dual band-notched characteristic. The operating frequency of the flexible GAF antenna covers the Wi-Fi 6e band, 2.4-2.45 GHz and 5.15-7.1 GHz. Different conformal applications are simulated by attaching the antenna to the surface of cylinders with different radii. The measured results show that the working frequency bands and the radiation patterns of the GAF antenna are relatively stable, with a bending angle of 180°. For demonstration of practical application, the GAF antennas are conformed to a commercial router. The spectral power of the GAF antenna router is greater than the copper antenna router, which means a higher signal-to-noise ratio and a longer transmission range can be achieved. All results indicate that the proposed GAF antenna has broad application prospects in next generation Wi-Fi.
柔性电子设备广泛应用于物联网、智能家居和可穿戴设备中，尤其是在具有不规则曲面的载体中。轻质、柔性且耐腐蚀的碳基材料在射频电子学中已得到广泛研究。然而，其导电性不足限制了它们的进一步应用。在这项工作中，提出了一种基于高导电性石墨烯组装薄膜（GAF）的柔性、低剖面双频维瓦尔第天线，用于5G Wi-Fi应用。所提出的剖面为0.548毫米的GAF天线包括一个裂环谐振器和开路半波长谐振器，以实现双频带阻特性。柔性GAF天线的工作频率覆盖Wi-Fi 6e频段、2.4 - 2.45吉赫兹和5.15 - 7.1吉赫兹。通过将天线附着到不同半径圆柱体的表面来模拟不同的共形应用。测量结果表明，GAF天线的工作频段和辐射方向图相对稳定，弯曲角度为180°。为了演示实际应用，将GAF天线应用于商用路由器。GAF天线路由器的频谱功率大于铜天线路由器，这意味着可以实现更高的信噪比和更长的传输范围。所有结果表明，所提出的GAF天线在下一代Wi-Fi中具有广阔的应用前景。
