Abstract: In analyzing the lobe direction accuracy of phased array antenna in condition of digital phasing,based on numerical simulation and analysis,the quantitative relationship between the maximum lobe direction error and the digit number of the phase shifter is given out,and a selecting standard for the digit number of the phase shifter is given.Simulation shows that the maximum lobe direction error only depends on the ratio of the array element spacing and the radar work-wavelength as well as the digit number of...