DDS在相控阵雷达系统中的应用

The Application of DDS in the Phased Array Radar System

直接数字合成技术 (Direct Digital Synthesis,缩写 DDS)是近年来迅速发展起来的一种新型的信号合成技术。由于采用了全数字结构 ,它具有宽的相对频带、精确的频率分辨率、极快的频率转换速度、低相位噪声及易集成等突出优点。本文提出了将 DDS应用于相控阵雷达系统 ,并具体分析了这一应用对整个相控阵雷达系统性能的影响 ,如复杂雷达基带波形的产生与捷变、低波束跃度实现、低副瓣电平设计等 。

Direct digital synthesis (DDS) is a new signal synthesis technique developed very fast in recent years. Because of its all digital construction, it has outstanding advantages, such as wide relative band, high frequency resolution, high speed of changing frequency, low phase noise and easily integrating. This paper proposes a new application of using DDS in phased array radar system and analyzes its effect such as the producing and hoping of complex radar baseband wave, of complicate radar, the realizing of low beam granularity, the designing of low sidelobes level, to the quality of the whole phased-array radar system. Finally, the paper introduces part results of the study of this scheme.