NF测试方法3Maxim/Dallas > App Notes > BASESTATIONS / WIRELESS INFRASTRUCTUREWIRELESS, RF, AND CABLEKeywords: rf, rfic, wireless, noisefigure measurement, gain, meter, y factor, rf ics, rficsNov 21, 2003APPLICATION NOTE 2875Three Methods of Noise Figure MeasurementThree different methods to measure noise figure are presented: Gain method, Y-factor method, and the Noise Figure Meter method. The three approaches are compared in a table.IntroductionIn wireless communication systems, the "Noise Figure (NF)," or the related "Noise Factor (F)," defines the noise performance and contributes to the receiver sensitivity. This application note describes this important parameter and details ways to measure it.Noise Figure and Noise FactorNoise Figure (NF) is sometimes ieferred to as Noise Factor……