传统上机载雷达是采用硬件稳定平台保持天线扫描空域稳定的,如今采用数据处理方法保持扫描空域电子稳定的研究正在引领发展趋势。文中针对机载平台运动引起天线波束指向角的改变以及由此带来的探测精度下降甚至目标丢失的问题,系统地探讨了一维相扫机载雷达保持扫描空域稳定的波束控制方法,建立了机载运动平台下指向角变换的数学模型,推导出由于平台运动引起的波束指向角变换公式,设计了一维相扫移相码的计算方法,通过仿真验证了计算精度、计算时间、波束指向精度和移相器位数选取等关键技术指标。结果表明空域稳定算法有效可靠,为机载相控阵雷达波束控制设计提供了通用化的设计思路,具有较大的工程意义和实用价值。

Traditionally, a hardware stabilized platform to maintain spatial stabilization of antenna scanning is frequently used by airborne radars. Nowadays, research on the usage of data processing method to achieve electronic stabilization in the scanning airspace is leading the development trend. In this paper, aiming at the problem of changes of the antenna beam pointing angle caused by the motion of airborne platform and the resulting decrease in detection accuracy or even the loss of the target, the method of beam steering to maintain spatial stabilization for one-dimensional phase scanning airborne radar is systematically discussed. The mathematical model of the directional angle transformation under the moving platform is established, and the formula of beam pointing angle transformation caused by the platform movement is deduced. The calculation method of one-dimensional phase scanning phase shift code is designed. The key technical indicators such as calculation accuracy, calculation time, beam pointing accuracy and the selection of phase shifter bits are verified by simulation. The results show that the spatial stabilization algorithm is effective and reliable, which provides a general design idea for the beam steering design of airborne phased array radar, and has great engineering significance and practical value.

TN958.92