Cause Analysis on Angular Error when Mono-pulse Radar is Tracking Noise Jammer and a Simulative Test

摘要

When mono-pulse radar is disturbed by self-protecting noise jamming, angular tracking error signals can be extracted from noise jamming because jammer and echo from a target both come from the same direction. Based on the principle of angular tracking of mono-pulse radar and signal transmission characteristics when noise jamming passes a receiver, this paper makes analyses and points out the following causes leading to angular errors: finite frequency spectrum of intermediate frequency amplifier, the asymmetry between two receiver branches, frequency collimation error and the magnitude of transmitting power of noise jammer. A simulative test about angular error of active tracking and passive tracking are made on MATLAB platform under various matters. It is shown that angular error of passive tracking is greater than that of active tracking.