论文标题
使用Metagrats的全空间空间电源分隔器的分析设计
Analytical Design for Full-space Spatial Power Dividers Using Metagratings
论文作者
论文摘要
我们提出了一个严格的理论框架，用于使用Metagratings设计全空间空间电源分隔线。在我们的研究中，当前对空间功率分隔平台的限制，例如仅反射性能，正常发病率以及小反射/折射角度的限制已完全放松。建立了基于Floquet-Bloch（FB）定理的模态膨胀分析，以便在复合金属光栅的反射和传输侧都考虑一组离散的空间谐波，在该反射和传输侧，通过应用适当的边界条件来计算未知系数。通过消除不必要的散射谐波，提议的元杂志具有实现从完美异常折射到反射传输的空间功率分隔的不同功能的能力，而无需诉诸全波数值优化。数值模拟很好地证实了理论预测。我们的发现不仅提供了实现任意空间功率分隔线的可能性，而且还揭示了一种简单的替代方案。
We present a rigorous theoretical framework for designing full-space spatial power dividers using metagratings. In our study, the current restrictions of spatial power dividing platforms such as reflection-only performance, operating at normal incidence, and small reflection/refraction angles have been totally relaxed. A modal expansion analysis based on Floquet-Bloch (FB) theorem is established so that a discrete set of spatial harmonics is considered in both reflection and transmission sides of a compound metallic grating in which the unknown coefficients are calculated by applying proper boundary conditions. By eliminating the unwanted scattering harmonics, the proposed metagrating has the ability to realize different functionalities from perfect anomalous refraction to reflection-transmission spatial power dividing, without resorting to full-wave numerical optimizations. The numerical simulations confirm well the theoretical predictions. Our findings not only offer possibilities to realize arbitrary spatial power dividers but also reveal a simple alternative for beamforming array antennas.
