论文标题

梁转向可编程的元信息的可伸缩性分析

Scalability Analysis of Programmable Metasurfaces for Beam Steering

论文作者

Taghvaee, Hamidreza, Abadal, Sergi, Pitilakis, Alexandros, Tsilipakos, Odysseas, Tasolamprou, Anna, Liaskos, Christos K, Kafesaki, Maria, Kantartzis, Nikolaos V., Cabellos-Aparicio, Albert, Alarcón, Eduard

论文摘要

可编程的元面积在对任何表面的电磁响应中提供了前所未有的控制,因此引起了极大的关注。此类功能引起了新型设计范式,例如软件定义的超材料(SDM)和可重新配置的智能表面(RIS),并具有多个开创性的应用。但是,根据潜在广泛应用程序池的特殊性量身定制的可编程元面积的开发成为一项艰巨的任务,因为设计空间变得非常大。本文旨在通过提出一种方法来简化设计过程,该方法通过元图响应的半分析模型,允许将性能缩放趋势作为代表性设计变量集的函数得出。尽管该方法可以适合任何电磁功能,但本文探讨了其用于5G应用的26 GHz梁转向的情况。将常规的束转向指标评估为单位细胞大小,单位细胞态数以及不同发射率和反射角度的元表面大小的功能。结果表明,Metasurfaces 5 $λ\ times $ 5 $λ$或更大,单位单元为$λ/3 $,四个单位电池状态可确保整体性能良好。此外,已经证明,大于$θ> 60^o $的角度显着降低了性能,并且为了打击这一目标,在单位电池的开发中需要额外的努力。这些绩效趋势与功率和成本模型相结合,将为最佳的跨表面尺寸铺平道路。

Programmable metasurfaces have garnered significant attention as they confer unprecedented control over the electromagnetic response of any surface. Such feature has given rise to novel design paradigms such as Software-Defined Metamaterials (SDM) and Reconfigurable Intelligent Surfaces (RIS) with multiple groundbreaking applications. However, the development of programmable metasurfaces tailored to the particularities of a potentially broad application pool becomes a daunting task because the design space becomes remarkably large. This paper aims to ease the design process by proposing a methodology that, through a semi-analytical model of the metasurface response, allows to derive performance scaling trends as functions of a representative set of design variables. Although the methodology is amenable to any electromagnetic functionality, this paper explores its use for the case of beam steering at 26 GHz for 5G applications. Conventional beam steering metrics are evaluated as functions of the unit cell size, number of unit cell states, and metasurface size for different incidence and reflection angles. It is shown that metasurfaces 5$λ\times$5$λ$ or larger with unit cells of $λ/3$ and four unit cell states ensure good performance overall. Further, it is demonstrated that performance degrades significantly for angles larger than $θ> 60^o$ and that, to combat this, extra effort is needed in the development of the unit cell. These performance trends, when combined with power and cost models, will pave the way to optimal metasurface dimensioning.

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