基于双信号源的双偏振雷达接收机故障诊断技巧

与传统天气雷达相比,双偏振天气雷达在硬件组成上改动较大,尤其是在接收机及天线馈线方面。硬件上的改动使得双偏振雷达的诊断方法存在较大不同。本文通过与传统天气雷达在硬件结构和标定通道两方面的对比,分析了S波段双偏振天气雷达与单偏振雷达在故障诊断方面的区别,提出通过“双信号源+动态法”隔离主通道与测试通道和通过“双信号源+太阳法”分段隔离主通道的两种诊断技巧,并例举了双偏振雷达的典型故障个例进行分析,为后续雷达规划的双偏振雷达升级改造提供参考依据,同时也为台站对双偏振雷达的故障诊断提供思路借鉴。

A Troubleshooting Technique of Dual Polarization Radar Receiver Based on Dual-Signal Source

Compared with the traditional weather radar, the hardware of the dual polarization weather radar has changed greatly, especially in the receiver and antenna feeder. The change of hardware makes the diagnosis method of dual polarization radar different. This paper analyzes the difference between S band dual polarization weather radar and single polarization radar in fault diagnosis by comparing with traditional weather radar in hardware structure and calibration channel. This article proposes two diagnostic techniques: isolating the main channel and test channel by the dual signal source and dynamic method; segmenting the main channel by the dual signal source and sun calibration. The article gives the fault cases of dual polarization radar, which can provide a reference for the planned upgrading of the dual polarization radar, and also provide a reference for the troubleshooting of the dual polarization radar at the radar stations.