空间色散在完美非镜面反射边界条件中的作用

IF 1.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY EPJ Applied Metamaterials Pub Date : 2022-01-01 DOI:10.1051/epjam/2022015
C. Yepes, S. Maci, S. Tretyakov, E. Martini
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引用次数: 1

摘要

在理想非色散不可穿透边界条件(BCs)和可穿透边界条件(BCs)下,通过超表面的完全异常反射的精确解最近得到了发展。第二种模型对于PCB技术中实现的元表面的描述更为准确。针对这类特殊的超表面,本文研究了这两种解之间的联系,旨在阐明空间色散的作用。通过将不同波数的传输线分别与入射波和反射波相关联的等效传输网络,可以将这两个解联系起来。最后,进行了数值分析,以评估忽略空间色散的影响,因为在基于局部反射系数的线性相位梯度的设计中是这样做的。
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On the role of spatial dispersion in boundary conditions for perfect non-specular reflection
Exact solutions for perfect anomalous reflection through metasurfaces have been recently developed in terms of both ideal nondispersive impenetrable boundary conditions (BCs) and penetrable BCs on top of a grounded slab. The second model is more accurate for the description of metasurfaces realized in PCB technology. Focusing on this particular class of metasurfaces, this paper investigates the connection between the two solutions, with the aim to clarify the role of spatial dispersion. It is shown that the two solutions can be related through an equivalent transmission network where transmission lines with different wavenumbers are associated to the incident and reflected waves. Finally, numerical analyses are carried out to assess the impact of neglecting spatial dispersion, as it is done in designs based on a linear phase gradient of the local reflection coefficient.
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来源期刊
EPJ Applied Metamaterials
EPJ Applied Metamaterials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.10
自引率
6.20%
发文量
16
审稿时长
8 weeks
期刊最新文献
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