吸波材料特性的测试及其改进

Measurement and improvement of the absorber characteristic

通过对国军标中角锥形吸波材料吸波性能测量的研究,我们得到在采用矢量网络分析仪对吸波材料进行吸波性能测量时,要利用矢量网络分析仪的时域门截取高于背景的能量,再反变换回频域,通过比较金属板和吸波材料的测量值得到结果。而本文又提出了一种改进的测量方法。通过计算标准球和金属平板的RCS理论值,我们得到二者的差值ΔRCS。利用标准球和金属平板的真实值、测量值和背景的关系,巧妙的运用测试过程中环境不变的特性,得到金属板的真实值。再利用公式较准确的求出吸波材料的反射率。

Measurement of the absorbability capability of taper absorbers in national military standard illustrated that： when vector network analyzer measuring the absorbable capability of absorber, time-gate intercepts these energy which is higher than background, after backing to frequency domain, an outcome could be made by means of comparing the measurement result between the plane and the absorber. An improved resolution proposed here is to calculate the RCS theoretical value of the standard sphere and the plane to acquire the dispersion of the two, according to the internal connection in terms of measuring value among standard sphere, plane and the background, along with the assumed fixed background parameters, a real value could be achieved, at the same time the reflectivity of the absorber can also be calculated with high precision by formula.