束方向灵活的透明的元表面基于多位相梯度变化
Meijia Guo1, Penghui Xin1, Haoyuan Sun1
1College of Electronic Information, Qingdao University, Qingdao, 266071, China.
Scientific reports
|May 2, 2025
概括
这项研究引入了一种灵活,透明的元表面,使用Pancharatnam-Berry阶段进行精确的光束转向. 它有效地减少了雷达截面,并转换了循环极化,从而使先进电子中的应用成为可能.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 材料科学 材料科学 材料科学
- 光学是什么?光学是什么?光学是什么?
背景情况:
- 超表面提供了对电磁波的先进控制.
- 潘查拉特纳姆-贝里 (PB) 阶段提供了阶段操纵的机制.
- 灵活和透明的超表面对于下一代电子设备至关重要.
研究的目的:
- 提出和演示一个编码的超表面设计,利用PB阶段用于光束方向.
- 为了实现同时降低雷达截面 (RCS) 和高效的光束转向.
- 研究灵活电子和可重新配置的智能表面 (RIS) 的潜力.
主要方法:
- 用于双共振和宽带宽的修改C结构的超表面单元的设计.
- 编码超表面阵列以控制相梯度并实现所需的电磁响应.
- 对光束转向能力和偏振转换的实验验证.
主要成果:
- 超表面阵列减少了13-20 GHz频段的线性极化RCS.
- 高极化转换比 (PCR) 大约为0.9,可用于14-25 GHz的循环极化波.
- 在X轴和Y轴沿着±50°广角光束转向,可见光透射率为82%.
结论:
- 拟议的灵活和透明的超表面有效地操纵电磁波.
- 该设计能够显著减少RCS和广角光束转向.
- 该技术对灵活的电子和可重新配置的智能表面 (RIS) 的应用具有前景.
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