摘要
针对采用数字化宽带相控阵雷达的应用场合,提出了一种通过改变数字阵列单元基带信号移相值和延时值实现波束指向和波形的数字相控阵雷达T/R模块解决方案。给出了宽带线性调频信号引起的波束指向偏移和实时时间延迟补偿的分析方法。在分析了宽带线性调频信号对相控阵雷达带宽和扫描角的影响的基础上,通过对基带数字时钟的精确延迟,实现了数字相控阵雷达宽带信号发射和扩展最大扫描角的目的。给出了实现的原理图和试验结果,并通过试验验证该方法的有效性。
Aimed at the application of wideband digital array radar,a project about digital array radar T/R module is proposed which realizes beam direction and waveform by changing the phase-shift value and delay value of base band signal of digital array element.A method for the beam direction deviation induced by wideband linear frequency modulation and the compensation of true time delay is also presented.Then the influence of the scanning angle of phase array radar and wideband linear frequency modulation（LFM） signal is analyzed.Via the fine delay of base band signal,the aim of expanding the operating bandwidth of phased-array radar and scanning angle is realized.The theory diagram and experimental result are provided.This method is proved effective by hardware.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2010年第8期1608-1612,共5页
Systems Engineering and Electronics
关键词
数字化相控阵雷达
实时延迟
孔径渡越
线性调频
digital array radar
true time delay
aperture cross
linear frequency modulation（LFM）
