首页|Highly Flexible Graphene-Film-Based Rectenna for Wireless Energy Harvesting
Highly Flexible Graphene-Film-Based Rectenna for Wireless Energy Harvesting
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Herein,we report the design,fabrication,and performance of two wireless energy harvesting devices based on highly flexible graphene macroscopic films(FGMFs).We first demonstrate that benefiting from the high conductivity of up to 1 × 106 S m-1 and good resistive stability of FGMFs even under extensive bending,the FGMFs-based rectifying circuit(GRC)exhibits good flexibility and RF-to-DC efficiency of 53％at 2.1 GHz.Moreover,we further expand the application of FGMFs to a flexible wideband monopole rectenna and a 2.45 GHz wearable rectenna for harvesting wireless energy.The wideband rectenna at various bending conditions produces a maximum conversion efficiency of 52％,46％,and 44％at the 5th Generation(5G)2.1 GHz,Industrial Long-Term Evolution(LTE)2.3 GHz,and Scientific Medical(ISM)2.45 GHz,respectively.A 2.45 GHz GRC is optimized and integrated with an AMC-backed wearable antenna.The proposed 2.45 GHz wearable rectenna shows a maximum conversion efficiency of 55.7％.All the results indicate that the highly flexible graphene-film-based rectennas have great potential as a wireless power supplier for smart Internet of Things(loT)applications.
flexible rectennashighly flexible graphene-based filmswireless energy harvesting
Jingwei Zhang、Yuchao Wang、Rongguo Song、Zongkui Kou、Daping He
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Hubei Engineering Research Center of RF-Microwave Technology and Application,School of Science,Wuhan University of Technology,Wuhan 430070,China
Sanya Science and Education Innovation Park of Wuhan University of Technology,Sanya 572000,China
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
National Natural Science Foundation of ChinaOpen Funds for Sanya Science and Education ParkFundamental Research Funds for the Central Universities
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