空间色散对蘑菇型人工阻抗表面反射的影响
Effects of Spatial Dispersion on Reflection from Mushroom-type Artificial Impedance Surfaces
摘要：
最近的几项工作强调了空间色散在线介质中的作用，并证明了平行金属线阵列的行为可能与具有负介电常数的单轴局部材料非常不同。在这里，我们调查使用本地和非本地的均匀化方法的空间色散的影响，从Sievenpiper介绍的蘑菇状结构的反射。本文的目的是澄清蘑菇结构中的空间色散的作用，并证明在某些条件下，它被抑制。超材料衬底或超表面被建模为覆盖有阻抗表面的线介质。令人惊讶的是，它被发现，在这样的配置中的空间色散的影响几乎可以被抑制时，板是电薄的，并且线介质可以非常准确地使用本地模型建模。这一结果铺平了道路，利用线介质板的等离子体型响应的人工表面的设计。
英文摘要：
Several recent works have emphasized the role of spatial dispersion in wire media, and demonstrated that arrays of parallel metallic wires may behave very differently from a uniaxial local material with negative permittivity. Here, we investigate using local and non-local homogenization methods the effect of spatial dispersion on reflection from the mushroom structure introduced by Sievenpiper. The objective of the paper is to clarify the role of spatial dispersion in the mushroom structure and demonstrate that under some conditions it is suppressed. The metamaterial substrate, or metasurface, is modeled as a wire medium covered with an impedance surface. Surprisingly, it is found that in such configuration the effects of spatial dispersion may be nearly suppressed when the slab is electrically thin, and that the wire medium can be modeled very accurately using a local model. This result paves the way for the design of artificial surfaces that exploit the plasmonic-type response of the wire medium slab.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
