北京航空航天大学学报 ›› 2011, Vol. 37 ›› Issue (6): 728-732.

• 论文 • 上一篇    下一篇

应用于毫米波反射计的多项式校准方法

赵鑫1, 刘金扬1, 苗俊刚1, 姜景山2   

  1. 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
  • 收稿日期:2010-11-25 出版日期:2011-06-30 发布日期:2011-07-05
  • 作者简介:赵 鑫(1983-),男,湖北黄梅人,博士生,xinzhao@ee.buaa.edu.cn.
  • 基金资助:

    国家杰出青年科学基金资助项目(40525015)

Polynomial calibration method for millimeter-wave reflectometer

Zhao Xin1, Liu Jinyang1, Miao Jungang1, Jiang Jingshan2   

  1. 1. School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
    2. Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2010-11-25 Online:2011-06-30 Published:2011-07-05

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.

Abstract: 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 polynomial 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.

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