Multi-resonant Tessellated Anchor-based Metasurfaces (dataset)

In this work, a multi-resonant metasurface that can be tailored to absorb microwaves at one or more frequencies is explored. Surface shapes based on an ‘anchor’ motif, incorporating hexagonal, square and triangular-shaped resonant elements, are shown to be readily tailorable to provide a targeted range of microwave responses. A metasurface consisting of an etched copper layer, spaced above a ground plane by a thin (<1/10th of a wavelength) low-loss dielectric is experimentally characterised. The fundamental resonances of each shaped element are exhibited at 4.1 GHz (triangular), 6.1 GHz (square) and 10.1 GHz (hexagonal), providing the potential for single- and multi-frequency absorption across a range that is of interest to the food industry. Reflectivity measurements of the metasurface demonstrate that the three fundamental absorption modes are largely independent of incident polarization as well as both azimuthal and elevation angles.本研究针对可定制化实现单频或多频微波吸收的多谐振超表面（metasurface）展开探索。基于‘锚点’基元、集成六边形、方形及三角形谐振单元的表面结构，经验证可灵活定制以实现目标频段的微波响应。本研究对一款由刻蚀铜层构成、通过薄型（小于波长1/10）低损耗介质层与接地板间隔的超表面进行了实验表征。各形状单元的基波谐振分别出现在4.1 GHz（三角形单元）、6.1 GHz（方形单元）及10.1 GHz（六边形单元），可实现食品工业关注频段内的单频及多频微波吸收。对该超表面的反射率测试结果表明，三种基波吸收模式在很大程度上不受入射极化方式、方位角与仰角的影响。