基于可编程超表面的亚太赫兹波束操控

Sub-terahertz beam steering based on programmable metasurfaces

摘要:

随着6G技术的不断发展，太赫兹雷达、通信感知一体化逐渐成为电子信息领域的重要研究方向。可编程超表面凭借其重量轻、易共形和动态可调等优势，在太赫兹波束操控方面表现出很高的自由度，因而在通信、成像、雷达等方面具有重要的应用潜力。本文从加载半导体元件的可编程超表面设计理论出发，选取一款高频适用的GaAs变容二极管，构建了一种1 bit数字编码超表面，并对其亚太赫兹电磁响应和波束操控性能进行了表征。结果表明，该超表面阵列在W波段具有宽角度的动态波束赋形和波束扫描能力，实验结果与仿真结果吻合良好。

Abstract:

With the continuous development of 6G technology, terahertz radar and integrated sensing and communication are gradually becoming important research directions in the field of electronics and information. Programmable metasurfaces, with their advantages of being lightweight, conformable, and dynamically tunable,exhibit a high degree of freedom in terahertz beam manipulation, and thus hold significant application potential in communication, imaging, and radar. Starting from the design theory of programmable metasurfaces loaded with semiconductor components, a GaAs varactor suitable for high-frequency applications is selected, a 1 bit digital coding metasurface is constructed, and its sub-terahertz electromagnetic response and beam manipulation performance are characterized. The results show that the metasurface array has wide-angle dynamic beamforming and beam scanning capabilities in the W-band, with experimental results matching well with simulations.