分析了箔条云散射特性测量技术,进而开展箔条云外场动态测量实验。对实测箔条云RCS的概率分布进行拟合,并对拟合结果进行检验,同时分析了箔条云散射特性与时间、频率等之间的关系。结果表明,当显著性水平为0.01时,该箔条云在S波段和X波段的动态RCS服从χ2分布;箔条云形成之后,箔条密度随着时间的推移而下降,导致其RCS减小;随着频率升高而波长减小,箔条间互耦效应将减小,箔条云RCS的起伏也将减小。

The technique for measurement of chaff cloud scattering characteristics was analyzed,then we made experiment on dynamic measurement of chaff cloud.Fittings were carried out to the statistical distribution of chaffs RCS,and the fitting result was tested.The relationship between chaff cloud characteristics and time/frequency was investigated.It is indicated that:1)at evidence level of 0.01,the chaffs dynamic RCS presents chi-square distribution at S-band and X-band;2)the density of chaff cloud would decrease with time,which will result in lower RCS;and 3)with increasing of frequency and decreasing of wavelength,the coherence effect between different chaffs would get less,which will result in weaker fluctuation.