This paper discussed the error in the measurement of noise figure—The method of Y factor , The error is caused by mismatch of RF attenuater and IF attenuater and the others in the measurement system.
The noisefactor analyzer's operation principle and the basic noisefactormeasurement method, Y factor method, are described.
论述了噪声系数分析仪的工作原理和噪声系数最基本的测量方法——Y因子法。
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The DC charge based and ac based capacitance measurement technologies are analysised from the point of noise performance, which is the key factor to determine the resolution of measurement.