摘要
本文在跟踪雷达目标角度测量的基础上推导了跟踪雷达方程。笔者首先根据测角精度要求计算出回波最小SNR,然后根据最小SNR计算出雷达最大作用距离,证明其与天线有效孔径的3/4次方成正比,而非跟踪雷达方程建立在目标检测基础之上得出的与1/2次方成正比的结论。在典型测量精度条件下,基于测量的跟踪雷达方程得出的目标距离要小于基于检测的跟踪雷达方程,测量精度要求越高,跟踪雷达威力越近。本文针对相控阵体制,得出了天线波束扫描对跟踪距离的影响因子,即扫描角余弦的三次方。
The novel tracking radar range equation is established based on requested angle precision. The maximal range is calculated based on the minimal SNR owing to the requested angle precision. The maximal range is in pro- portional to the three-quarters power of antenna effective aperture, but not square of antenna effective aperture. The current tracking radar range equation （RRE） is based on target detection. Under the condition of typical angle pre- cision, the maximal range of RRE based on measurement is shorter than that of RRE based on detection. The high- er the angle precision is, the shorter the tracking range is. As for the phased array system, the loss of range owing to beam scan is presented, namely the cube of cosine of scan angle.
出处
《电气电子教学学报》
2013年第4期78-80,共3页
Journal of Electrical and Electronic Education
关键词
跟踪雷达
雷达方程
相控阵
tracking radar
radar range equation
phased array
