吸波材料反射率测试曲线平滑方法

由于硬件软件水平和环境的干扰,在微波暗室中对吸波材料反射率进行测试会受到这些因素的影响,使得测量结果不能如实反映被测材料的特性,因此必须对测量数据进行处理来获得准确的结果.本文介绍了一种测试曲线滤除噪声的方法,先对测量数据进行傅里叶变换,获得数据的频谱分布,然后用低通滤波器将干扰谱滤除,最后用逆傅里叶变换获得处理后的数据.通常曲线边缘处理是平滑方法的难点,本文很好地解决了这个问题.

Curve smoothing method for reflectivity of wave absorbtive material

Because of the limitation of hard/software technology as well as the interference of environment around,the test of reflectivity of wave absorbtive material in microwave dark room is affected by the above factors which made the measuring results cannot faithfully reflect the real characteristic of the material tested,so measuring data needs to be processed to obtain more accurate result.A method of filtering the high-frequency noise for the testing curve is presented in this paper.First measuring data is processed with FFT to obtain frequency distribution.Then low-pass filter filters out the interference frequency,Finally IFFT is used to retrieve the processed data.Generally edge detecting is the tough point in the process of smoothing,which is got better dealt with in this paper.