Achromatic Multibeam Diffraction Based on Phase Gradient Metasurfaces

doi:10.1109/TAP.2025.3575275

PRE

Yuxiang Wang

DOI：10.1109/TAP.2025.3575275

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摘要

En 中文

超表面因其卓越的波前调控能力而受到广泛关注。然而，色差作为一种广泛存在于相位调制调谐超材料器件中的现象，限制了其在现代通信系统中的应用。远场消色差已被探索，但仅考虑了单阶衍射。随着对多光束衍射的需求和研究的增加，包括但不限于相位调制超表面和超结构光栅，其中大多数方法不适用于色散调控。本文分析了衍射场的消色差机制，并提出了一种可行的解决方案，用于同时相干控制多阶衍射的色散。在超原子中引入手性相位以调控色散特性。此外，为证明该概念，设计了一种用于双光束生成的消色差色散超表面。在目标频率7、10和13 GHz处，传播方向为−35°和+35°的两束光表现出良好的角度稳定性。此外，还讨论了光束方向精度和超表面孔径的限制。进一步提出了一种改进方法，可显著提高衍射角精度，其中实际光束角度与预期角度之间的偏差降低至0.8°以下，提升了73%。本研究在衍射管理方面取得了重大进展，并在无线通信和雷达探测中展现出巨大潜力。

Keyword:

Achromatic dispersion

multibeam diffraction

phase gradient metasurfaces

期刊

IEEE Transactions on Antennas and Propagation

IF:

5.8

论文数:

719

被引数:

6.8W

机构

harbin institute of technology

学者数:

8.0W

论文数: 6.6W

被引数: 66

Université Paris Nanterre

学者数:

论文数: 36

被引数: 849

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