Abstract:

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.