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缩比条件
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    The method can solve not only the extrapolation of the RCS frequency characteristic curve of the complex scatterer , that is said that the RCS of other frequency of the target can be gained and so offsets the limitation of the testing equipment , but also the difficulty which is how to deduct the RCS values of the prototype from the RCS values in the model measurement when the ideal scaling condition can not be satisfied .
    该方法可以从复杂散射体RCS的频率特性测试曲线实现曲线的外推,即推演出其它频段上该目标的RCS,从而弥补测试设备的不足并解决当频率缩比条件不满足时从模型测量值推演出原型值的困难。
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    By these we can get the RCS of the prototype scatterer not only after the scaling of the RCS values in model measurement by means of the similarities, but also when the ideal scaling relation are not satisfied because of the limitation of experimental conditions.
    这不仅使散射体RCS的模型测量结果经相似性关系缩放后能得到原型散射体的RCS,同时对于因工作条件限制而使理想缩比条件不满足时也能计算出原型值.
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The model-measurement of electromagnetic scattering for stealthy targets has become an important part for the research of aircrafts. Based on the theory of similarity, the conditions which should be satisfied in an ideal measurement are refered first. The effects of conditional deviations made in a practical measurement on the RCS have also been given, According to thase theory and technology,the RCS ofprototype for stealthy targets can be evaluated from the model-measurements,even though the ideal scalingconditions...

The model-measurement of electromagnetic scattering for stealthy targets has become an important part for the research of aircrafts. Based on the theory of similarity, the conditions which should be satisfied in an ideal measurement are refered first. The effects of conditional deviations made in a practical measurement on the RCS have also been given, According to thase theory and technology,the RCS ofprototype for stealthy targets can be evaluated from the model-measurements,even though the ideal scalingconditions are not satisfied.

隐身雷达目标的电磁散射缩比测量是研究飞行器隐身、反隐身技术发展过程中不可缺少的组成部分。根据相似性原理,首先提出能与全尺寸原型目标具有相同散射特性的缩比测量应该具备的条件;然后提出当实际的缩比测量偏离这些条件时对雷达散射截面的影响。依照本文提供的原理和方法,可从不满足理想缩比条件的模型测量值推算原型的雷达散射截面。

Radar cross-section of targets varies with their configurations, dimensions, wavelength and radiation direction of waves. In this paper, a general representation for the radar cross-section of simply face-shaped scatterer with variance in these parameters is given. With this representation, the radar cross-section of prototype of this scatterer can be evaluated by means of model-testings, even though the scaling relations between the prototype and the models are not satisfied.

雷达目标的散射截面值随目标的形状、大小、电磁波的波长和传播方向而变。本文给出了简单外形导电面目标的雷达散射截面随这些参量改变的一般表示式。利用这个表示式,可从不满足尺寸或波长缩比条件的模型测试值推算原型目标的雷达散射截面值。

With the general expression for an arbitrarily simple-shaped scatterer's scattering characteristics as a starting point, the RCS varieties during the respective change of each parameter are analyzed. By these we can get the RCS of the prototype scatterer not only after the scaling of the RCS values in model measurement by means of the similarities, but also when the ideal scaling relation are not satisfied because of the limitation of experimental conditions. The latter result has established an academic basis...

With the general expression for an arbitrarily simple-shaped scatterer's scattering characteristics as a starting point, the RCS varieties during the respective change of each parameter are analyzed. By these we can get the RCS of the prototype scatterer not only after the scaling of the RCS values in model measurement by means of the similarities, but also when the ideal scaling relation are not satisfied because of the limitation of experimental conditions. The latter result has established an academic basis for the extrapolation of the scattering frequency characteristic curves, and provided a new approach to the frequency range expansion of the RCS scaling measurement equipments.

从基本散射体散射特性的普适表达式出发,分析其中各参数单独变化时RCS的变化规律.这不仅使散射体RCS的模型测量结果经相似性关系缩放后能得到原型散射体的RCS,同时对于因工作条件限制而使理想缩比条件不满足时也能计算出原型值.后者为散射体频率特性曲线的外推奠定了理论基础,也为RCS缩比测量设备的频率扩展提供了新的方法和途径.

 
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