海面多路径效应对雷达探测性能的影响分析

为了分析某型搜索雷达在对低空目标威力检飞试验中出现点迹丢失、航迹中断问题的具体原因，针对被试雷达的性能指标和技术特点，对影响雷达低空探测性能的技术参数进行了实际测量，测量结果表明雷达工作正常，根据雷达试验时的实际使用环境，初步定位雷达威力下降的具体原因是由于海面多路径效应造成。本文在建立低空目标多路径回波模型的基础上，分析了多路径回波合成场强引起的雷达波束分裂对雷达探测威力的影响，并通过对被试雷达多路径效应下威力方向图仿真对这一结论予以验证，分析对比表明，实际试验中雷达探测目标点迹丢失严重及出现航迹中断距离范围与仿真结果相吻合。研究结果对搜索雷达系统设计及靶场试验结果评定具有一定的指导意义。

Simulation analysis on influence of sea surface multipath effect on Radar Detection Capability of Low Altitude Targets

In order to find out the reason of radar plot missing and track Interrupt-oriented during radar coverage test for low altitude target, aimming at performance index and technical feature of under proof radar, technical parameters which have effect on radar low altitude detection performance were measured. Result show that radar works properly. According to radar actual enviromental conditions, the reason of radar coverage decline was initially mapped on sea surface multipath effect. Based on the model establishing of low altitude multipath echo waveform, the effect on radar detecting coverage of beam splitting caused by multipath effect echo synthesis strength was analyzed, to validate conclusions, radar vertical coverage pattern in the conditon of multipath effect was simulated, comparsion and anlysis testified that the distance of radar plot missing and track Interrupt-oriented conform very closely to simulation result. The analysis result is of great significant to radar design and range trial.