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一、引言 微波天线,如抛物面、卡塞格伧天线等,大都采用几何光学法设计,要提高这些天线的性能,必须使馈源喇叭的相位中心和反射面系统的焦点吻合。因此,要精确测量馈源喇叭的相位中心。 关于相位中心的测量方法,许多文献已作过介绍,测量的基本原理大致相同。这些方法都是比较检测天线和参考天线收到的电波相位,作出相位方向图,再由这个相位方向图求其曲率中心。测量方法及数据处理等操作非常繁锁。当这些测量方法所得到的相位方向图不是圆曲面时,就不能把相位
I. INTRODUCTION Microwave antennas, such as parabolic and Cassegrain antennas, are mostly designed by geometrical optics. To improve the performance of these antennas, the phase center of the feed horn and the focal point of the reflective surface system must be matched. Therefore, to accurately measure the phase center of the feed horn. Many methods have been introduced for the measurement of phase centers, and the basic principles of measurement are roughly the same. These methods compare the phase of the waves received by the detection antennas and the reference antenna, make a phase pattern, and find the center of curvature from this phase pattern. Measurement methods and data processing operations are very complicated. When the phase pattern obtained by these measurement methods is not a circular surface, the phase can not be obtained