S11 Calibration Method for a Coaxial Line with Three Reference Materials and no Short Termination Condition for Dielectric Measurement in Liquids
S11 Calibration Method for a Coaxial Line with Three Reference Materials and no Short Termination Condition for Dielectric Measurement in Liquids
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S11 液体介电测量中无短路终止条件的三参考材料同轴线校准方法
DOI：
10.23919/ursiap-rasc.2019.8738728
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K. Shibata
中科院分区：
文献类型：
--
作者：
K. Shibata
本文提出了一种无短终止条件的三种参考材料同轴馈电式开放式截止波导矢量网络分析仪（VNA）的S11校准方法。首先推导了三种任意阻抗标准的S11校准方程，然后对夹具特有的静电电容进行了量化。然后通过将电容值代入等效电路，在0.50、0.75和1.0 GHz频率下确定样品材料前表面输入阻抗的理论值。然后确定样品材料前表面的校准S11值。通过将S11定标值与EM分析计算值进行比较，验证了该方法的有效性和测量精度。数值结果表明，基于所提出的方法，在无短终止条件下，利用三种参考材料的VNA对同轴馈电型开放式截止波导进行S11校准是有效的。在0.5 ~ 3.0 GHz频率范围内对S11进行了实际测量，验证了该方法的有效性。
This paper proposes an S11 calibration method for a coaxial-feed-type open-ended cut-off waveguide with a vector network analyzer (VNA) from three reference materials with no short termination condition. The equation for S11 calibration from three arbitrary impedance standards was first derived, and the electrostatic capacitance unique to the jig was then quantified. The theoretical values for input impedance at the front surface of the sample material were then determined by substituting the capacitance value into the equivalent circuit at frequencies of 0.50, 0.75 and 1.0 GHz. The calibrated S11 value for the front surface of the sample material was then determined. The validity and measurement accuracy of the proposed method were verified via comparison of this S11 calibration value with that calculated using EM analysis. The results numerically indicated the validity of S11 calibration for the coaxial-feed type open-ended cut-off waveguide using VNA from the three reference materials with no short termination condition based on the proposed procedure. The effectiveness of the method was also verified from actual measurement of S11 in the frequency range from 0.5 to 3.0 GHz, thereby confirming its effectiveness.