基于伪距比对的数字多波束天线相位中心标定方法

摘要

在星地时间同步系统中，天线的相位中心成为影响同步精度的重要因素。研究了数字多波束天线原理及相位中心概念，针对其特有的工作方式设计了一种伪距比对标定法，通过比对参考波束的伪距值以较小代价实现数字多波束天线的相位中心标定。利用该方法对数字多波束天线相位中心进行了标定，结果表明伪距比对标定法不需要暗室和专用测量系统，提高了数字多波束天线相位中心的可测试性。%The antenna phase center is an important factor in satellite⁃ground time synchronization system. This paper studies the principle of digital multi⁃beam antenna and the concept of phase center, proposes the method of calibrating phase center for digital multi⁃beam antenna based on pseudo⁃range comparison,realizes calibrating phase center for digital multi⁃beam antenna through compa⁃ring with pseudo⁃range of reference beam with less cost and finally analyzes the examples that uses the method for calibrating phase center of digital multi⁃beam antenna.The results show that the method of pseudo⁃range comparison can improve testability of calibrating phase center for digital multi⁃beam antenna without anechoic chamber and special measuring system for calibrating phase center.