基于弯折结构的FSS吸波超材料

FSS Absorbing Metamaterial Based on Bending Structure

本文介绍了一种基于FSS的小厚度、大带宽超材料吸收体。在F4B基板上制造了总厚度仅为2 mm的结构,重复单元的尺寸为10 mm × 10 mm。当电磁波垂直入射在吸收体上时,其吸收带宽为8.9 GHz (从10.46 GHz到19.54 GHz)。材料的吸收率都在90%以上,最高吸收率为100%。通过大量的模拟,结构得到了优化。此外,绘制了电磁参数εeff和μeff图像来说明吸收机制,绘制了顶层和底层的电流图像来进一步支持吸收机制。最后,通过实验验证了结构对垂直入射电磁波的吸收能力。

In this paper, a FSS-based metamaterial absorber with small thickness and large bandwidth is presented. Structures with a total thickness of only 2 mm were fabricated on a F4B substrate, and the dimensions of the repeating unit were 10 mm × 10 mm. The absorption bandwidth of the absorber was 8.9 GHz (from 10.46 GHz to 19.54 GHz) when an electromagnetic wave was incident perpendicularly on the absorber. The absorptions of the materials are all above 90% and the highest absorption is 100%. The structure was optimised by extensive simulations. In addition, electromagnetic parametersεeffand imagesμeffwere plotted to illustrate the absorption mechanism, and current images of the top and bottom layers were plotted to further support the absorption mechanism. Finally, the structure’s ability to absorb vertically incident electromagnetic waves was experimentally verified.