摘要
以线性调频信号为例,揭示窄带相控阵在大孔径宽扫描角情况下不能有效发射宽带高分辨信号的实质。针对线性调频信号,提出2种宽带宽角相控阵发射波束形成新方法,给出了实现示意框图。新方法采用时域数字处理,与时域采用抽头延迟线的FIR滤波器波束形成方法和频域DFT波束形成方法相比,文中方法简单、所需设备量少、易于工程实现。
The essence of the fact that wideband signal can not be effectively transmitted using narrowband phased array in scenarios with large aperture and scan angle is given. Two wideband transmitting beamforming methods for phased radar based on the LFM waveform in the presence of large scan angle are proposed. The block diagrams are given. The novel methods employ digital processing in the time domain. Compared with the beamforming method utilizing FIR filter consisting of tapped delay lines in the time domain and the beamforming technique with DFT in the frequency domain, the presented methods demand the smaller number of equipment and easy to be implemented in engineering.
出处
《现代电子技术》
2006年第24期134-136,共3页
Modern Electronics Technique
关键词
宽角
宽带波束形成
相控阵
线性调频信号
large scan angle
wideband beamforming
phased array
linear frequency signal
