【摘要】 提出一种用于空中目标探测的无源毫米波雷达准光路和聚焦天线设计方法。对焦平面阵列实时成像探测系统中天线的聚焦特性进行了仿真，分析了天线的焦径比对天线聚焦特性的影响，研究了抛物面天线和偏置抛物面天线在馈源偏焦时天线波束的畸变情况。设计了聚焦天线的馈源阵列，对馈源阵列天线单元间的互耦进行了分析。探索了反射面支架对聚焦天线聚焦特性的影响。仿真分析的结果为无源毫米波雷达空中目标探测系统的准光路和聚焦天线设计提供了支撑。更多还原

【Abstract】 A design method of quasi-optical path and focusing antenna for passive millimeter wave imaging radar for aerial target detection was proposed. The focusing characteristics of the antenna in the focal plane array real-time imaging detection system were simulated. The influence of the focal-diameter ratio of the antenna on the focusing characteristics and the beam distortion of both parabolic antenna and offset parabolic antenna with defocused feed were researched. The feed array of the focusing antenna was designed, further, the mutual coupling between the antenna elements was analyzed. The influence of the reflector holder on the focusing characteristics of the antenna was explored. The design of the quasi-optical path and focusing antenna of the passive millimeter wave radar aerial target detection system can be supported by the results of the simulation and analysis.更多还原