基于混响室的电场探头快速校准系统

Rapid Calibration System of E-Field Probe Based on Reverberation Chamber

首先,分析了现有电场探头校准技术的特点,并针对现有校准技术存在的设备昂贵、操作过程繁琐费和不能连续频率点校准等不足,提出了基于混响室的快速校准方案;然后,详细地叙述了系统的设计、混响系统归一化标定技术和降低测量不确定度的各种措施,包括多天线技术和连续搅拌测量平均技术等;最后,进行了不确定度分析,结果表明扩展测量不确定度达到1.2~1.6 dB,从而证明了所提出的校准方案的有效性,对于提高电场探头的校准精度和可靠性具有重要的意义。

Firstly,the characteristics of the current electric field probe calibration technologies are analyzed,and the rapid calibration scheme based on reverberation chamber is proposed in view of the shortcomings of the existing calibration technologies,such as expensive equipment,tedious operation process and non-continuous frequency point calibration.Then,the design of the system,the normalization calibration technique of the reverberation system and various measures to reduce the measurement uncertainty,including the multi-antenna technique and the continuous stirring measurement averaging technique,are described in detail.Finally,an uncertainty analysis is carried out.The results show that the extended measurement uncertainty reaches 1.2~1.6 dB,which proves the effectiveness of the proposed calibration scheme and is of great significance for improving the calibration accuracy and reliability of the electric field probe.