应用于毫米波反射计的多项式校准方法  

Polynomial calibration method for millimeter-wave reflectometer

作　　者：赵鑫[1] 刘金扬[1] 苗俊刚[1] 姜景山[2] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]中国科学院空间科学与应用研究中心,北京100190

出　　处：《北京航空航天大学学报》2011年第6期728-732,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家杰出青年科学基金资助项目(40525015)

摘　　要：为了在毫米波波段准确测量波导器件的反射系数,提出了一种应用在反射系数测试前端(反射计)中的校准方法.该校准方法采用基于多项式的误差模型,使得每一个误差项的求解都转化成一个求解轨迹圆圆心的问题,同时不影响求解精度.采用一个滑动负载、一个滑动短路和一个短路器,在毫米波波段降低了对标准件理想程度的要求.实验中搭建了一个Ka波段的反射计,图解误差项的求解过程,分析了误差项的物理意义.把校准后的测量结果与商用矢量网络分析仪(VNA,Vector Network Analyzer)进行比较,吻合较好.同样比较了一组W波段反射计对波纹喇叭的测量结果,进一步验证了方法的合理性.In order to measure the accurate reflection coefficient of waveguide component at millimeter-wave band, a method for reflectometer calibration was proposed. The calibration method was based on a poly-nomial error model, making the solution of each error term transformed into a problem solving the center of a circle trace, without reducing the solution precision. The method adopted a sliding load, a sliding short and a short circuit, thus reduced the requirements of standards in the millimeter-wave band. In experiment, a Ka-band reflectometer was built, the errors＇ solving processes and physical meanings were presented. After calibration, measurement results from reflectometer and vector network analyzer （VNA） were compared, and good agreement was achieved. Measurement results of a W-band corrugated horn were also compared, which further validate the method.

关 键 词：毫米波 反射系数 反射计 校准 标准件 多项式 

分 类 号：TM934.72[电气工程—电力电子与电力传动]