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本文讨论了在微波暗室内影响雷达散射截面(RCS)静态测量精度的因素。着重分析背景、喇叭馈源间耦合以及定标体引入误差的原因。指出目标支撑架和定标体是主要的误差源,其选用原则是:目标的雷达散射截面必须高于背景雷达散射截面20dB以上;视被测目标雷达散射截面量级选择相应的目标支撑和定标体。最后通过200mm×200mm的金属平板理论值和测量值的比较,说明上述分析的正确性。
This article discusses the factors that affect the accuracy of RCS static measurements in anechoic chambers. Emphasis is placed on the analysis of the background, the coupling between the horns and feeds, and the reasons for the introduction of errors in the scale. It is pointed out that the target support frame and scale body are the main sources of error. The principle of selection is that the radar cross section of the target must be higher than 20 dB above the background radar cross section, and the corresponding target support The standard body. Finally, by 200mm × 200mm metal plate theoretical value and measured value comparison, the correctness of the above analysis.