Abstract: Aiming at the problem of how to construct an effective model to evaluate the reasonableness of detection performance when a radar detects a third-generation aircraft covered by an approaching support jamming performance of stealth aircraft, a stealth aircraft jamming model based on diving to the near support track is proposed. After calculating the aircraft attitude angle, the time-varying dynamic RCS series are extracted. Using Swerling IV distribution, the characteristics of radar instantaneous detection probability time-varying in penetration jamming between normal flight and stealth aircraft are studied and compared. Simulation results show that the radar detection probability can be reduced by 72.5% when the stealth aircraft approaches the supporting jamming power of 1 kW. Combined with one million chaff jamming, the detection ratio of the third-generation aircraft can be reduced to 4.996×10^-10, and the low detection probability penetration of the third-generation aircraft can be effectively realized.

Key words: stealth aircraft, approaching support jamming, chaff cloud jamming, detection probability, radar detection performance