一种相位梯度超表面及其制备方法和应用
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PEKING UNIV
- Filing Date
- 2022-05-26
- Publication Date
- 2026-07-17
AI Technical Summary
FMCW lidar cannot perform tangential detection and has high energy consumption, making it difficult to meet the needs of autonomous driving.
A phase gradient metasurface based on a trapezoidal pair composite unit structure is designed. Multi-beam reflection scanning is achieved through a three-layer material structure, and the energy ratio between beams is controlled. A passive design is adopted to reduce energy consumption, and large-angle scanning and signal-to-noise ratio are achieved by adjusting the spacing l of the trapezoidal pair units.
It achieves passive low power consumption, easy integration and miniaturization of FMCW lidar, increases scanning range and measurement accuracy, is suitable for visible light and infrared bands, and is suitable for land and underwater detection.
Smart Images
Figure CN117169850B_ABST