宽带雷达导引头半实物仿真目标模拟方法研究

Research into Target Simulation Method for Wideband Radar Seeker Hardware-in-the-loop Simulation

随着射频宽带器件水平的不断提高,宽带技术在导引头研制领域得到了越来越广泛的应用。为了满足宽带雷达导引头射频半实物仿真试验需求,针对传统天线阵列馈电通道对宽带信号角位置模拟精度的限制,分析了天线阵列目标角位置精度的影响因素,开展了馈电通道宽带幅相特性实验研究。实验结果表明,宽带幅相特性不一致导致角位置精度下降。为了提高宽带信号的角度位置精度,研究了基于数字域的预失真技术,并对该方法进行了验证。

With the continuous advancement of radio frequency(RF)wideband device level,wideband technology has been more and more widely used in the field of seeker development.In order to meet the demand for wideband radar seeker RF hardware-in-the-loop simulation test,focusing on the limit of traditional antenna array feed channel on simulation precision for wideband signal angular position,the influence factors of antenna array target angular position accuracy are analyzed,and the experimental study of feed channel wideband amplitude-phase characteristics is carried out.The experimental results show that angular position accuracy degradation is caused by the inconsistent of wideband amplitude-phase characteristics.The predistortion technology based on digital domain is researched to improve the wideband signal angle position accuracy,and the method is verified.