The self-defence noise jammer is stowed on a target protected platform

so noise jamming comes from the same direction as echo of the target.The analysis based on angle tracking theory indicates that the monopulse radar can track the target through tracking noise jammer.In order to reduce the angular error of monopulse radar and ensure its uninterrupted combat

a method of introducing pulse modulation circuit and adjusting the bandwidth of intermediate frequency amplifier and that of the video amplifier is proposed based on the main reason causing angular error.Simulation studies are made about the choice of pulse width

the bandwidth of intermediate frequency amplifier and that of video amplifier.The results show that the method can effectively reduce angular measurement error of the monopulse radar when tracking noise jammer.