基于SOLT校准技术的S参数测量不确定度评定

Evaluation of Measurement Uncertainty for S-parameters Based on SOLT Calibration Technology

目前,常用的S参数测量不确定度评定方法中均未考虑S参数相关性的问题,论文给出了一种2GHz^18GHz频率范围内S参数测量不确定度的评定方法,该方法从校准件的定义出发,基于SOLT校准技术对矢量网络分析仪进行自校准,将校准件引入的不确定度通过矢量网络分析仪传递给被测件(DUT),通过使用蒙特卡洛仿真的方法(MCM)得到矢量网络分析仪测量DUT S参数的测量不确定度,评定过程中考虑了相关性问题,提高了S参数测量不确定度的可靠性和合理性。

Nowadays,the relativity in the measurement uncertainty evaluation methods about S-parameter isn＇t.A method for evaluating the uncertainty of S-parameter is proposed.The method is based on the definition of calibration kits.Then the uncertainty of calibration kits propagates to the DUT from VNA self-calibration.Eventually,MCM is used to get the S-parameters＇measurement uncertainty of DUT.The relativity comsidered,the method can get more credibility and reasonable S-parameters＇measurement uncertainty of DUT.