非相干两点源对单脉冲雷达的干扰分析

Analysis of Noncoherent Dual-Source Jamming on Monopulse Radar

建立了对单脉冲雷达进行角度欺骗的非相干两点源干扰模型;分析了在两点源随机相位差的影响下,两点源功率比不同时的雷达天线指向误差角。仿真表明:非相干两点源能够有效地对单脉冲雷达角跟踪系统造成测角误差,其干扰效果可以等效成相位差为π/2的相干两点源干扰;雷达天线在两源等功率时指向两者重心,功率不等时既不指向两源能量重心也不指向功率较大者,而是两者之间的某个点。

The noncoherent dual source interference model for simulating the angle deception nopulse radar was constructed. Affected by random phase error of the dual sources, the antenna pointing was analyzed when the power ratios of the dual sources were different. The noncoherent dual source could effectively cause angle measuring error of the angle tracking system. The interference effect could be equal to the coherent dual source interference in that the phase error is π/2. When the power of dual sources is equal, the radar antenna follows the power centroid; otherwise, it will follow neither the power centroid nor the higher power source, but a point between them.