一种超宽带薄型的超材料线性交叉极化转换
Pegah Nochian1, Zahra Atlasbaf2
1Electrical Engineering Department, Tarbiat Modares University, Tehran, Iran. p.nouchian@modares.ac.ir.
Scientific reports
|January 24, 2025
概括
本研究介绍了一种用于微波频率的超宽带元材料线性交叉极化转换器 (CPC). 紧的设备在宽带上实现高极化转换比率,适合先进的通信系统.
科学领域:
- 电磁学和元材料的使用
- 微波工程 微波工程
- 应用物理 应用物理
背景情况:
- 超材料具有独特的电磁特性,这种特性在自然材料中没有.
- 交叉偏振转换对于提高通信系统中的信号完整性至关重要.
- 现有的设计往往缺乏超宽带性能或紧性.
研究的目的:
- 设计和演示一种新的超宽带薄型元材料线性交叉极化转换器 (CPC).
- 在广泛的微波频率范围内实现高极化转换比率.
- 通过模拟和实验测量来验证设计.
主要方法:
- 使用两个同心变形环在带有金属背面的介电基板上的CPC的设计.
- 使用CST和FEKO软件进行电磁模拟.
- 对共极和交叉极化的反射系数和极化转换比率的分析.
- 在变化极化和斜冲击角度下对性能的研究.
- 制造的CPC的实验验证.
主要成果:
- 从8.75-17.75 GHz实现68%的带宽,极化转换比率超过90%.
- 在特定频率下,已证明峰值极化转换比率为99.5%,99.8%和99.3%.
- 获得的共极化反射系数低于-11dB,交叉极化反射系数高于-1.1dB.
- 单元格尺寸是紧的 (6.3 × 6.3 × 2 mm3).
- 模拟显示与同等电路分析和实验结果有很好的一致性.
结论:
- 拟议的超材料CPC具有超宽带,薄,高效.
- 其紧的尺寸和高性能使其适用于先进的通信应用.
- 该设计显示了雷达截面减小和电磁干扰抑制的前景.
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