一种高精度宽带干涉仪相位校准方法

A High-accuracy Broadband Interferometer Phase Calibration Method

为了提高宽带干涉仪测向系统的测向精度,提出了一种动静结合的干涉仪通道相位校准方法。将干涉仪测向系统划分为校准电路单元和测向电路单元,采用事先对校准电路单元相位参数静态测量获取各通道准确的相位参数表,再结合该参数表完成测向电路单元中多路接收通道动态校准。通过样机测试验证,相对传统校准方法,该方法校准精度高,提升了系统测向精度,能随系统进行在线动态校准,在干涉仪测向、相控阵雷达收发通道相位校准方面具有很好的推广意义。

In order to increase direction-finding accuracy of direction-finding system, an interferometer phase calibration method based on association of static measure and dynamic calibration is projected. Interferometer direction-finding system is divided into calibration circuit unit and direction-finding circuit unit. Calibration circuit unit completes static measure of phase differences among channels of calibration circuit unit,at the same time generates a parameter sheet. Then direction-finding circuit unit calibrates phase of all direction-find channels based on the parameter sheet. The method was proved to be effective by actual measure, and has increased system direction-finding accuracy. The method has greate extended worth in calibration of interferometer direction-finding and phased array radars’TR channel because of dynamic calibration ability.