冰雪对大型数字阵列雷达测角精度影响分析

Effect Analysis of Ice and Snow on the Angle Measurement Accuracy for Large-scale Digital Array Radar

大型数字阵列雷达,通常需外建高透波率的罩体,起防雨、防风以及防尘等作用。对我国北部地区,常年近一半时间处于寒冷状态,罩体外侧若有较多积雪未及时清理,或积雪融化结冰,会对电磁信号产生折射,影响雷达探测稳定性和测角精度。文章以某大型数字阵列雷达为例,分析冰雪对电波传播的作用,并通过实测数据验证罩体冰雪对测角精度的影响,为天线罩积雪防护设计提供参考。

Large-scale digital array radar,usually needs to build a high transmittance enclosure to protect against rain,wind and dust.For the northern region of China,it is in a cold state for nearly half of the year round.If there is too much snow covers the outer surface of the Radome and is not cleared in time,or snow melts and freezes,electromagnetic signal will be refracted and radar detection stability and angle measurement accuracy will be affected.This paper takes a large-scale digital array radar as an example to analyze the impact of ice and snow on radio wave propagation,and verifies the effect of cover ice and snow on angle measurement accuracy through the measured data,providing reference for the design of antenna cover snow protection.