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一、前言作为一种国家标准量值的长期保存,标准量值产生器最好按照不同的物理原理构成,以便相互比对,长期监督,保持标准量值的准确性。为了与已建立的十厘米微波热噪声标准源(是通过测量不同温度下不锈钢波导的衰减常数来定度标准源)比对,我们建立了十厘米微波热噪声付标准源(是利用银波导的电阻率和电阻温度系数来定度标准源),并利用气体放电噪声源作为传递标准源,用同一辐射计对这两个标准源进行了相互比对。实验
I. Preface As a kind of long-term preservation of the national standard value, the standard value generator is preferably constructed according to different physical principles in order to compare with each other and make long-term supervision to maintain the accuracy of the standard value. In order to compare with the established standard source of 10-cm microwave thermal noise, which is a standard source by measuring the attenuation constant of stainless steel waveguides at different temperatures, we established a 10-cm microwave thermal noise standard source (using silver waveguide Resistivity and temperature coefficient of resistance to determine the standard source), and the use of gas discharge noise source as a transfer standard source, with the same radiometer on the two standard sources were compared with each other. experiment