论文标题
反射跨膜的宏观建模：角反应和远场散射
Macroscopic Modeling of Anomalously Reflecting Metasurfaces: Angular Response and Far-Field Scattering
论文作者
论文摘要
鉴于对未来移动通信系统的设计和优化的极具挑战性的要求，研究人员正在考虑创建智能无线电环境的可能性，通过使用集成到墙壁，天花板或外墙的可重新配置和智能的元素。在这个新颖的交流范式中，可调的元面条将事件的重定向波重定向到所需的方向。为了在任何现实的场景中设计和表征此类智能无线电环境，有必要知道当从其他方向照亮这些元信息以及如何估算有限尺寸的异常反射器的散射时，这些元信息如何行为。我们研究异常反射器对任意照明角的角度响应。使用表面阻抗模型，我们解释了相位梯度跨曲面的反射系数在照明角度的反射系数，并为典型结构提供了数值示例。我们还考虑从有限大小的元整日散射，并定义了一种途径，将异常反射的全角响应包括在传播通道的射线追踪模型中。开发的模型适用于有限尺寸的其他衍射光栅。
In view of extremely challenging requirements on design and optimization of future mobile communication systems, researchers are considering possibilities of creation intelligent radio environments by using reconfigurable and smart metasurfaces integrated into walls, ceilings, or facades. In this novel communication paradigm, tunable metasurfaces redirect incident waves into the desired directions. In order to design and characterize such smart radio environments in any realistic scenario, it is necessary to know how these metasurfaces behave when illuminated from other directions and how scattering from finite-sized anomalous reflectors can be estimated. We study the angular response of anomalous reflectors for arbitrary illumination angles. Using the surface-impedance model, we explain the dependence of the reflection coefficients of phase-gradient metasurfaces on the illumination angle and present numerical examples for typical structures. We also consider scattering from finite-size metasurfaces and define a route toward including the full-angle response of anomalous reflections into the ray-tracing models of the propagation channel. The developed models apply to other diffraction gratings of finite size.
