Electromagnetic shielding and multi-beam radiation with high conductivity multilayer graphene film
Electromagnetic shielding and multi-beam radiation with high conductivity multilayer graphene film
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高导多层石墨烯薄膜的电磁屏蔽和多束辐射
DOI：
10.1016/j.carbon.2019.09.019
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发表时间：
2019-12-01
期刊：
影响因子：
10.9
通讯作者：
He, Daping
中科院分区：
文献类型：
--
作者：
Fan, Chi;Wu, Bian;He, Daping
在微波区域，石墨烯材料通常具有较高的电阻率，这限制了其在电磁屏蔽和辐射方面的应用潜力。同时，常规碳材料在减薄和柔性方面难以满足电子器件和电磁屏蔽的要求。在这里，通过对GO薄膜进行高温热处理和随后的压缩轧制，获得了具有高导电性和小厚度的柔性多层石墨烯薄膜（MGF）。我们通过实验研究了厚度为 27 mm 的 MGF 的 EMI 屏蔽性能，其在 2.6 GHz 至 40 GHz 范围内显示出 70 dB 的高屏蔽效能 (SE)。利用其1.13 x 10(6) S/m的高电导率和32.7m Omega/square的低方块电阻，首次实现了平均增益为15.07 dBi、大波束扫描范围为120度的基于MGF的多波束毫米波天线阵列。所有测量结果表明，柔性、低厚度、低密度、高导电的多层石墨烯薄膜在电磁屏蔽、电磁传导和电磁辐射器件中的应用具有巨大的潜力。 (C) 2019 Elsevier Ltd. 保留所有权利。
In the microwave region, graphene material usually has a relatively high resistivity, which limits its application potential in electromagnetic shielding and radiation. Meanwhile, conventional carbon materials are difficult to meet the requirement of electronic devices and electromagnetic shielding in terms of thickness reduction and flexibility. Here, a flexible multilayer graphene film (MGF) with high conductivity and small thickness is achieved by high temperature thermal treatment of GO films and subsequence compression rolling. We experimentally study the EMI shielding performance of the MGF with a thickness of 27 mm, which shows high shielding effectiveness (SE) of 70 dB from 2.6 GHz to 40 GHz. Making use of its high conductivity of 1.13 x 10(6) S/m and low sheet resistance of 32.7m Omega/square, a MGF based multi-beam millimeter wave antenna array with average gain of 15.07 dBi and large beam scanning range of 120 degrees is realized for the first time. All the measurements indicate that the flexible, low thickness, low-density and highly conductive multi-layer graphene film have great potential in the application of electromagnetic shielding, electromagnetic conduction and electromagnetic radiation devices. (C) 2019 Elsevier Ltd. All rights reserved.