吸收型箔条云对雷达波的干扰效能

Research on Jamming Performance of Absorptive Chaff Cloud on Radar Wave

研究了吸收型箔条云对雷达波的干扰效能。借鉴高斯在处理通量问题的思路,把吸波体的整个体积作为研究对象,分析吸收型箔条云对雷达波的干扰机制;然后根据电磁波传输线理论和能量守恒原理,建立吸波体表面透射损耗和反射损耗模型;最后结合雷达方程,分析雷达从发射电磁波到接收目标回波的具体过程,建立了回波功率衰减模型,得到干扰后的雷达最大作用距离变化情况。仿真结果显示,随着频率的升高,功率衰减系数总体呈上升趋势,在厚度仅为100m时,衰减最大能达到23.4dB,衰减在8.7dB以上频宽为11GHz,占整个频段的64.7%。因此吸收型箔条云对雷达波有明显的衰减作用,具有一定的战场应用价值。

Absorptive chaff is a kind of light and high-efficiency passive jamming material.Through making echo amplitude scattered heavily in the air received by enemy equipment in detecting fallen,this can reduce the probability of being found and tracked by radar equipment.This paper studies the jamming performance of absorptive chaff cloud on radar wave.First,combined the existing research results,the jamming mechanism of absorptive chaff cloud on radar wave is analyzed.Then,according to the transmissionline theory and energy conservation principles,models of reflection loss and transmission loss on the surface of absorber are built.Finally,apower attenuation model is built,and radar maximum range changes after interference is obtained.The simulation results show that the absorptive chaff cloud has obvious weak effect on radar wave.With 100 meters＇ thickness,the attenuation can reach 23.4 dB.When attenuation is greater than 8.7 dB,the bandwidth can be 11 GHz,which is 64.7 percent of the entire bandwidth.Therefore,absorptive chaff cloud has obvious weaken effect on radar wave,and this has some value of application in the battleground.