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本文叙述了来自两种箔条的雷达回波的实验性幅度和相位测量结果,一种是跟在执行任务的飞机后面的箔条(刚投放的箔条),另一种是在飞机离开该区域以后的箔条(已展开的箔条)。超高频和X波段相干雷达可用来获得连续投放的箔条装置和离散箔条装置的实验数据。箔条云的平均辐射速度v_0和速度标准偏差σ_v可根据复包络频谱密度估值来估算。对于已展开的箔条,σ_v值分布在0.3～1.2米/秒的范围内。对于刚投放的箔条,σ_v和v_0都取决于箔条在尾流中的位置。在飞机后面150米处,σ_v的变化范围为2.0～2.7米/秒;在450米处,σ_v的变化范围为0.8～1.5米/秒。业已发现,σ_v的大小与雷达频率或箔条类型之间没有明显的关系。本文导出了表示圆锥形扫描对复包络频谱密度的影响的表达式。
This article describes the experimental amplitude and phase measurements of radar echoes from two types of chaff, the chaff following the aircraft on the mission (the chaff just put) and the other after the aircraft leaves the Area after the foil (expanded foil). Ultra-high frequency and X-band coherent radars can be used to obtain experimental data for chaff devices and discrete chaff devices that are continuously deployed. The average radiation velocity v_0 and the velocity standard deviation σ_v of the chaff cloud can be estimated based on the complex envelope spectral density estimation. For expanded foil strips, the σ_v values range from 0.3 to 1.2 m / s. For the chaff just put, both σ_v and v_0 depend on the position of the chaff in the wake. At 150 meters behind the aircraft, σ_v varies from 2.0 to 2.7 m / s; at 450 m, σ_v varies from 0.8 to 1.5 m / s. It has been found that there is no obvious relationship between the size of σ_v and the radar frequency or chaff type. This paper derives an expression that shows the effect of a conical scan on the spectral envelope of the complex envelope.