噪声系数测量中的温度修正方法

Temperature correction methods for noise figure measurement

一般配置非智能噪声源的噪声系数分析仪,当环境温度变化时,不能及时修正环境温度对噪声系数测量的影响。文中介绍了噪声系数的测量原理及影响噪声系数测量不确定度的各种因素。从Y因子法测量噪声系数的原理出发,详细论述并推导了环境温度变化时噪声系数测量结果的修正方法。通过补偿温度变化对测量结果的影响,提高噪声系数测量,特别是低噪声器件噪声系数测量准确度。最终通过实验数据验证了理论推导的正确性,提供了温度修正曲线。

General noise analyzer equipped with non-smart noise source can not compensate the measurement results timely when the ambient temperature changes. The noise figure measurement principles and various impact factors on its measurement uncertainty are briefly described. Based on the Y-factor noise figure measurement principle, the correction method to measurement results when ambient temperature changes is demonstrated in detail. The noise figure measurement accuracy can be improved especially for low-noise device by this compensation method. The theoretical derivation of the temperature correction curve is verified through the experimental data.