在单个基板上的无对齐的扭曲分环元表面,对于线性偏振的子-泰拉赫兹波的2π相位范围
Optics express
|June 29, 2023
概括
这项研究引入了一种新的分环共振器 (SRR) 超表面,用于移动通信中操纵子特拉赫兹波. 该设计实现了高效的极化转换和相控,为下一代无线系统提供了高级功能.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 超材料是什么?超材料是什么?
- 无线通信无线通信
背景情况:
- 下一代移动系统需要对子特拉赫兹波传播进行先进的操纵,以实现高速,大容量通信.
- 现有的波浪操纵方法在效率和工业适用性方面面临挑战.
研究的目的:
- 提出和验证一种基于新型分环共振器 (SRR) 的超表面单元细胞,用于操纵线性偏振的亚特拉赫兹波.
- 为了实现有效的偏振转换和2π相设计性,用于移动通信应用.
主要方法:
- 设计一个分环共振器 (SRR) 结构,具有90°扭曲的间隙,用于交叉偏振波的操纵.
- 制造单元细胞的互补图案和具有二进制相位配置的超表面透镜.
- 实验验证制造结构的性能,包括偏振转换效率和透镜功能.
主要成果:
- 实现了2dB的线性偏振转换效率 (使用后侧偏振器) 和0.2dB (使用两个偏振器).
- 测量的峰值转换效率超过-1dB,在单个基板上使用后侧偏振器.
- 展示了具有聚焦,偏移和聚合能力的超表面镜头,显示了20.8dB的镜头增益.
结论:
- 拟议的SRR超表面提供了对相位可设计性和效率的独立控制,从而实现了有利于工业应用的无对齐特性.
- 超表面透镜表现出易于制造和实施,在与主动设备集成时具有动态控制的潜力.
- 简单的设计方法,依赖于扭转方向和间隙容量,有利于在未来的通信系统中广泛采用.
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