宽带低成本普通磁场探测器用于PCB近场测量
Ruichen Luo1,2, Zheng He2, Lixiao Wang3
1School of Information Engineering, Xiamen Ocean Vocational College, Xiamen 361005, China.
Sensors (Basel, Switzerland)
|July 12, 2025
概括
本研究引入了一种具有成本效益的宽带近场探测器,用于测量2-8 GHz射频 (RF) 电路中的磁场. 探测器使用印刷电路板 (PCB) 设计,并对射频组件进行准确的场测量.
科学领域:
- 电气工程 电气工程
- 电磁学 电磁学 电磁学 电磁学
- 微波工程 微波工程
背景情况:
- 准确的近场磁场 (Hz) 测量对于无线电频率 (RF) 电路设计和故障排除至关重要.
- 现有的探测器可能很昂贵或缺乏宽带功能,限制了它们的应用.
- 需要具有成本效益的解决方案来表征射频系统中的电磁干扰 (EMI) 和信号完整性.
研究的目的:
- 设计和验证用于测量RF电路中的正常磁场 (Hz) 的宽带近场探测器.
- 为了实现成本效益,使用标准印刷电路板 (PCB) 制造工艺.
- 调查使用微条线作为Hz探针的校准标准.
主要方法:
- 设计了一个使用FR-4基板的4层PCB探针,其中包括一个Hz检测单元和一个宽带微条带.
- 进行了电磁模拟,以确定探头参数并预测磁场响应.
- 使用微条纹线进行了校准实验,以验证探测器的校准因子.
- 在微条线和低噪音放大器 (LNA) 上进行了实用测量,以捕获场分布.
主要成果:
- 开发的探测器在2-8 GHz频率范围内有效运行.
- 宽带microstrip balun改善了常用模式的拒绝.
- 校准实验证实了探测器校准因子的准确性.
- 在LNA上的场分布测量成功识别了辐射组件.
结论:
- 拟议的基于PCB的近场探测器为RF电路中的宽带Hz测量提供了具有成本效益和高性能的解决方案.
- 探测器的设计和校准方法通过模拟和实验来验证.
- 该探头可以有效地用于表征射频组件和识别电磁辐射源.
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