大型线阵自适应数字波束形成超低副瓣技术

自适应数字波束形成技术是现代阵列天线系统必须采用的关键技术。为了对付强有源干扰,现代相控阵雷达都必须具有自适应的干扰抑制能力。除了对抗有源干扰外,大部分雷达还要求具有强杂波背景下检测目标的能力,这就需要雷达天线具有低或超低副瓣电平。本文针对大型线阵,结合数字波束形成,讨论了在保证自适应干扰置零的前提下,如何控制自适应波束的副瓣电平,从而实现阵列系统的超低副瓣性能。

Ultra-low sidelobe technique for large linear array adaptive digital beamforming

Adaptive digital beamforming is a key technique which is must adopted in modern array antenna systems. In order to resist the jamming, the modern phased radars must have the ability of adaptive jamming cancellation. Besides, most radars must detect the target in strong clutter, so the low sidelobe performance is required in the antennas. Aimed at large linear arrays, combined with DBF, how to control the sidelobe altitude of the adaptive pattern and to realize the ultra-low sidelobe performance of the array system is discussed in this paper.