微波六端口反射计和数据拟合校准方法

微波六端口反射计和数据拟合校准方法 TO CALIBRATE A SIX-PORT REFLECTOMETER WITH THE METHOD OF CURVE FITTING 张伟 Zhang Wei Wu Zhengxian 1 first-author 吴正娴 1 武汉大学空间物理与电子信息学系 武汉大学空间物理与电子信息学系 Department of Space Physics and Electronics Information,Wuhan University Department of Space Physics and Electronics Information,Wuhan University 利用六端口反射计进行测量时,必须先确定其数学模型中的系统常数,这就是它的校准过程。为了寻求一种简便而可靠的校准技术,本文提出了六端口反射计的数据拟合校准方法。本方法以一个可变短路器作为标准负载,将测量端口功率计的响应在短路面位置移动时的变化作为选定参考面反射系数相角的函数,通过数据拟合的方法得出该函数,继而得出系统参数。由于进行多点采样（采样点数 N≥5）,将测量结果进行数据处理,从而减小了单次测量中偶然误差对校准结果的影响,提高了校准的精度。 This essay intends to deal with the calibration of microwave six-port reflectometer,with which the coefficients in the formulas characterizing the system are determined before it is used.The theory of the curve fitting calibration suggested by the author helps to offer an easy and reliable calibrating method.In this method,a slip shorter is used as the standard,and the responces of the amplitude detec- tors on the measuring ports are defined as the functions of the phase of the slip shorter’s reflective coef- ficient,which alters from time to time.Yreated with the method of curve fitllng,the functions can be decided,thus the coefficients in the functions emerge.Because of multi-point sampling（not less than 5）,the affect of the occasional erros in each calibrating measurement to the result of the calibration gets less,and higher accuracy of the calibrating result is obtained. 微波测量 六端口反射计 校准技术 数据拟合 microwave measurement six-port reflectometer calibration techique curve fitting TN015 1992-04-01 2021-04-01 4