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含石墨烯三明治结构杂化超表面微波吸收性能调控研究
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TB34;O441.4

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国家自然科学基金(12074314,11674266)


Research on the Control of Microwave Absorption Properties of Hybrid Metasuface Containing Graphene Sandwich Structure
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    摘要:

    基于石墨烯的电磁可调性与具有特殊电磁响应的无源金属结构耦合,设计了三明治结构微波吸波超表面,系统研究了金属结构和石墨烯电性对吸波性能的调控。通过三维全波电磁场仿真,证实可以通过调节石墨烯方阻改变谐振频率处的吸波率,于740 Ω/sq实现微波的完美吸收,且由担任相移介质的聚丙烯的厚度控制谐振频率。构建l 石墨烯结构与金属微结构杂化超表面,对引入金属谐振模式进一步增强微波吸收的超表面设计,证实了可通过调节石墨烯方阻获得频率23.2 GHz和36.4 GHz处的微波完美吸收以及由其确定的宽带吸收。分析了作为主要结构参数的金属线宽、周期、金属石墨烯间距对吸波率与频率的影响。该研究在拓展超表面设计与石墨烯应用方面有着一定的价值。

    Abstract:

    A hybrid meta-surface for achieving microwave absorption is designed based on the tunability of graphene and passive metallic structure with specific response to utilize the metallic structure and the electric properties of graphene for controlling the wave absorption. Through simulating three-dimensional full-wave electromagnetic field, the results prove the simulation to be the fact that the absorption rate at the resonant frequency can be tuned by adding the bias voltage through the square resistance of graphene, a perfect-absorption is achieved at a resistance level of 740 Ω/sq, and the absorption frequency is determined by the polypropylene thickness. The hybrid meta-surface combined with metallic structure and microwave absorber is further constructed, the metallic structure with new resonant mode is designed to increase the operation band width of the microwave absorption. The perfect absorption can achieve at 23.2 and 36.4 GHz, and the these two frequencies defines a wide band microwave absorption. The influence of structural parameters on the absorptive rate and frequency is studied. The research on tunable absorption in hybrid meta-surface is of certain scientific value in meta-surface design and graphene related applications. Key words: graphene; meta-surface; microwave absorption

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高杨,张钰晶,蔡伟奇,付全红,张富利,樊元成*.含石墨烯三明治结构杂化超表面微波吸收性能调控研究[J].空军工程大学学报,2021,22(6):25-29

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  • 在线发布日期: 2022-01-30
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