基于混频器的非线性矢量网络分析仪双端口校准方法.pdfVIP

学兔兔 第31卷 第 l0期 仪 器 仪 表 学 报 Vn1．3l N 1O 2010年1O月 Chinese Journal of Scientific Instrument 0ct．2010 基于混频器的非线性矢量网络分析仪 双端口校准方法术 林茂六，张亦弛，张 姥，徐清华 (哈尔滨工业大学 哈尔滨 150001) 摘 要：基于混频器的非线性网络分析仪(NVNA)是一种新型的非线性网络测量平台。介绍了该平台的结构、原理、误差模型 和经典校准流程。结合NVNA的时不变测量特性，提出了2种新的双端口校准方案——Ahsent Thru和Blind Thru，并给出了具 体的校准流程。在新研制的NVNA原型样机上的实验表明，新方案与经典Unknown Thru方法的校准结果相一致。新方案丰富 了双端口NVNA校准手段，为NVNA的误差模型合理性以及校准结果准确性提供了有效的检验手段。 关键词：非线性矢量网络分析仪(NVNA)；校准；谐波相位参考；Unknown Thru；Absent Thru；Blind Thru；8项误差模型 中图分类号：TN98 文献标识码：A 国家标准学科分类代码：470．4017 Two-port calibration methods for mixer··based nonlinear vector network analyzer Lin Maoliu，Zhang Yichi，Zhang Zhe，Xu Qinghua (Harbin lmtitme of Technology，Harbin 150001，China) Abstract：Mixer—based nonlinear vector network analyzer(NVNA)is a new type of platform for nonlinear network measurements．This paper introduces its architecture，principle，error model and classical calibration procedure． Based on the time—invariant measuring feature of mixer-based NVNAs，two alternative two—port calibration schemes， Absent—Thru-based and blind—Thru—based schemes，are proposed with detailed illustrations．Experiments on a newly developed NVNA prototype verify the equivalence between the outcome of classical unknown—-Thru·-based calibration scheme and those of the new schemes．The new calibration procedures diversify the choices of two—port NVNA cali— bration，and offer a tool to examine the validity of the error model and the accuracy of calibration results of mixer— based NVNAs． Key words：nonlinear vector network analyzer(NVNA)；calibration；harmonic phase ref