可变相位中心天线阵校准技术  

The Calibration Method for Phase Center of LPA Array

作　　者：孙学军[1] 

机构地区：[1]电子科技大学,四川成都610054

出　　处：《无线电工程》2009年第12期43-45,共3页Radio Engineering

摘　　要：某类型可变相位中心天线的相位中心随频率和入射方位变化,而且受到天线阵架设环境的影响。因此需要在理想计算相位中心的基础上,在现场发射测试信号来修正各种误差引起的相位中心变化。提出一种现场校准方法,设计了校准天线的架设方法,推导出由测向基线相位差计算天线单元相位中心与阵中心距离的方程。仿真表明,天线单元相位中心经过校准后,空间谱测向算法的空间分辨力有明显提高。The phase center of LPA varies with signal frequency and direction of arrival. Then it is needed to compensate the phase center variety due to all kind of errors by transmitting a testing signal based on the ideal calculation. The paper presents a method of compensation on site and designs the setup of testing antennas. Then it deduces the equation of the distance from LPA phase＂ center to array center based on phase difference of DF baseline. The emulation testifies that distinguishing ability of MUISC is improved after the LPA phase center compensation in evidence.

关 键 词：可变相位中心天线 相位中心 校准 空间谱 

分 类 号：TN911.72[电子电信—通信与信息系统]