分析了电源纹波对行波管 (TWT)级联发射机放大链引起非线性失真的原因 ,通过对非线性失真公式进行变换 ,导出了发射电源纹波与相参雷达 MTI改善因子的关系式 ,给出了衡量电源纹波的参数 ,为雷达系统设计选择 TWT和确定电源纹波参数指标提供了定量理论依据。 The reason of nonlinear distortion caused by power ripple on the amplification chain of TWT cascaded transmitter is analyzed. By transforming the nonlinear distortion formula, the relationship between the power supply ripple and the coherent radar MTI improvement factor is derived , Gives the parameters to measure the power ripple, provides a quantitative theoretical basis for the radar system design choice TWT and power supply ripple parameters.