一个可追溯的低频衰减标准从1kHz到10MHz,用于下一代无线和EMC校准
1Research Institute for Physical Measurement, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8563, Japan.
Sensors (Basel, Switzerland)
|October 16, 2025
概括
一个新的衰减测量初级标准 (1kHz到10MHz) 确保EMC测试的高精度. 该系统使用了感应式电压分隔器和异极管检测,实现可靠校准的低不确定性.
科学领域:
- 电气计量学 电气计量学
- 电磁兼容性 (EMC) 是指电磁兼容性
- 无线电频率 (RF) 工程
背景情况:
- 在EMC和无线系统中对精确衰减测量的需求日益增加.
- 在1 kHz至10 MHz频率范围内需要可追溯标准.
- 现有高精度衰减校准方法的局限性.
研究的目的:
- 为从1kHz到10MHz的可追溯测量制定一个初级衰减标准.
- 在衰减测量中实现高精度和可靠性.
- 为EMC和低频无线系统中校准衰减提供解决方案.
主要方法:
- 使用双通道零检测方法,以感应电压分隔器 (IVD) 为参考.
- 在低频率 (1kHz-10kHz) 中使用直接测量与IVD比率.
- 实现异质子检测,以将更高的频率 (100 kHz-10 MHz) 转换为1 kHz以进行比较.
主要成果:
- 在20dB时达到2.2×10-3dB的扩展不确定性,在40dB时达到3.0×10-3dB,在60dB减弱时达到4.0×10-3dB的扩展不确定性.
- 已证明有效地抑制常态电流和通道间合以实现线性.
- 评估一个电阻级减弱器作为一个实用的转移标准,用于更广泛的校准.
结论:
- 开发的初级标准提供可追溯的,高精度的减弱测量在1kHz到10MHz范围内.
- 该系统有效地解决了在EMC和无线通信中精确校准的需求.
- 评估的传输标准促进了更广泛的可访问性和校准能力.
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