当今电子战中,常使用组合干扰战术,同时抗多个主副瓣干扰成为雷达系统面临的巨大挑战。矩形相控阵可以合成四个通道波束,并利用差波束对消和波束内的一个主瓣干扰,保持对目标的探测性能和测角精度。全数字化的相控阵可采用行列自适应波束合成,充分利用数字阵的自由度,同时抑制多个主副瓣干扰,提升了雷达同时抗干扰的能力。为进一步提高雷达的抗干扰和目标探测性能,文中提出一种新的两级架构,首先采用高增益的辅助窄波束消除主瓣干扰;然后,自适应合成和差波束并做单脉冲测角。该方法将干扰对目标探测性能的影响降到了最小。

In modern electronic warfare, it is quite challenging for the radar system to detect and track the target in presence of multiple mainlobe and/ or sidelobe jamming. For a rectangular array, a typical system is developed by forming four-channel beams to cancel only one mainlobe jamming for maintaining target detection and angle estimation accuracy. With digital phased array, the row and column based adaptive architecture is able to suppress multiple jamming by exploiting more degree of freedoms. In order to improve the performance, a novel two-stage processing structure is proposed by mainlobe jamming cancellation using narrow auxiliary beams steered precisely at the jamming angle and followed by sidelobe jamming cancellation using adaptive array. Simulation results have been given and it is validated that the proposed one has obtained the best capability in multiple jamming.

TN974

航空科学基金资助项目(2015ZD07006)