单脉冲雷达多模馈源分析与设计

详细分析了单脉冲雷达四喇叭三模馈源的原理和设计方法，指出馈源模比的变化和口径面相位分布的不一致，都会对馈源的方向图产生影响，考虑这些因素，经过严格推导，得出了这种馈源方向图的完整解析表达式。利用该结果，分析频率和模比对馈源方向图的影响，设计最优的馈源模比，计算出理想的馈源的和差方向图。并进一步对馈源的相位中心进行了分析，给出了频率和喇叭1：7面的相位分布对相位中心的影响结果。这些都会对工程设计具有一定的指导意义。

Analysis and Design of Multimode Feed Horn for Monopulse Radar

The theory and design of a feed with four horns and three modes is analyzed in detail in the paper. The changes of mode ratio and the horn aperture phase non-uniform distribution can bring about effects on the feed pattern. Considering the ahove factors, the analytic expression of feed pattern is provided through strict derivation. According to the result, the effects of frequency and mode ratio on the feed pattern are analyzed and the optimal mode ration of the feed is designed. The perfect sum and difference pattern is showed. The phase center of the feed is analyzed. The effects of frequency and phase distribution on phase center are given. These conclusions have certain instructional significance to engineering design.