快速的特拉赫兹光束造型和天线表征与相位移转全息
Michal Mrnka1, Harry Penketh2, David B Phillips2
1Department of Physics and Astronomy, University of Exeter, Exeter, EX4 4QL, UK. m.mrnka@exeter.ac.uk.
Scientific reports
|September 10, 2024
概括
阶段转移数字全息可以实时特拉赫兹 (THz) 源表征. 与THz电磁源的传统扫描技术相比,这种方法显著减少了测量时间.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 光学是什么?光学是什么?光学是什么?
- 超材料是指一种超材料.
背景情况:
- 描述电磁源对于天线设计和测试至关重要.
- 传统的近场扫描方法耗时且效率低下.
- 特拉赫兹 (THz) 频率范围为电磁测量带来了独特的挑战.
研究的目的:
- 应用相位转移数字全息以实时表征THz电磁源.
- 为了证明近距离和远距离测量的更快,并行方法.
- 为了验证该技术,使用平面凸PTFE球形镜头天线在290GHz.
主要方法:
- 采用了相位转移数字全息图与太赫兹探测器阵列.
- 在参考源和测试中的天线之间记录的强度干涉图.
- 使用延迟线来转移参考波的相位,以实现并行获取.
主要成果:
- 与点扫描相比,测量时间减少了数量级.
- 成功地绘制了天线的2D近场分布.
- 估计了THz源的远场辐射模式.
结论:
- 阶段转移数字全息是一种可行的技术,用于快速的THz源表征.
- 平行获取显著加快了测量过程.
- 该方法为THz范围内的电磁源实时分析提供了强大的工具.
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