水基吸波超材料的研究进展

Research Progress on Water-based Metamaterial Absorbers

吸波超材料已经成为国内外电磁隐身和防护领域的研究热点,并取得了一系列重要的研究成果。超材料独有的人工周期性结构能够引发特异的电磁特性,从而满足吸波器件“薄、轻、宽、强”的综合性能要求,其中宽频吸波仍然是超材料吸波器件设计的难点。与传统金属基吸收体相比,水在微波频段特有的频散效应有助于实现水基吸波体在此频率范围内的高效吸收。近年来,宽频水基吸波超材料已经取得了一定的突破,但依旧存在一些问题需进行总结分析。本文综述了近年来水基吸波超材料的重要研究进展,按照吸波介质与结构特性,分类介绍了基于单纯水、水溶液和复合型水基吸波超材料的主要特征,展开说明了水基吸波超材料在微波频段的应用优势,并在此基础上展望了水基吸波超材料多功能化的研究趋势。

Metamaterial absorber has become a research focus in the field of electromagnetic stealth and protection,and a series of important research results has been achieved recently.The specific electromagnetic properties induced by the unique artificial periodic structures of metamaterial,would better meet the comprehensive performance requirements of‘thin,light,wide,and strong’for absorbing devices,but the broadband absorbing is still the big challenge for designing metamaterial absorbing devices.Compared with traditional metal-based absorbers,water-based metamaterial absorber could achieve efficiently broadband microwave properties due to the unique dispersion characteristics of water at the microwave frequency range.Though breakthrough research results for water-based metamaterial absorbers have been achieved in recent years,there are still some unclear problems that need to be summarized and analyzed for water-based metamaterial absorbers.In this paper,based on the components and structural properties,the characteristics of pure water,water-solution and composited water-based metamaterial absorbers are introduced.The potential application of water-based metamaterial absorbers in the microwave frequency range is explained,and the research trend of multifunctional water-based metamaterial absorbers is prospected based on literatures.