论文标题
在可重构智能表面的路径上：一种基于Green的方法应用于向量字段的方法
On the Path-Loss of Reconfigurable Intelligent Surfaces: An Approach Based on Green's Theorem Applied to Vector Fields
论文作者
论文摘要
在本文中，我们在存在可重构智能表面的情况下介绍了无线链路的自由空间路径损失的基于物理的分析表征。提出的方法基于格林定理的矢量概括。获得的路径模型可以应用于二维同质化的元面积，这些元素由子波长散射元件制成，并且在反射或传输模式下运行。路径损失是根据可计算的积分来制定的，该积分取决于传输距离，无线电波的极化，表面的大小以及所需的表面变换。封闭式表达式是在代表远场和近场部署的两个渐近方案中获得的。根据提议的方法，揭幕了几个设计参数和操作制度的影响。
In this paper, we introduce a physics-based analytical characterization of the free-space path-loss of a wireless link in the presence of a reconfigurable intelligent surface. The proposed approach is based on the vector generalization of Green's theorem. The obtained path-loss model can be applied to two-dimensional homogenized metasurfaces, which are made of sub-wavelength scattering elements and that operate either in reflection or transmission mode. The path-loss is formulated in terms of a computable integral that depends on the transmission distances, the polarization of the radio waves, the size of the surface, and the desired surface transformation. Closed-form expressions are obtained in two asymptotic regimes that are representative of far-field and near-field deployments. Based on the proposed approach, the impact of several design parameters and operating regimes is unveiled.
