Agilent Fundamentals of RF and Microwave Noise Figure Measurements

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1、AgilentFundamentalsofRFandMicrowaveNoiseFigureMeasurementsApplicationNote57-1TableofContents1.WhatisNoiseFigure?..............................................................................3Introduction....................................................................................

2、...................3Theimportanceofnoiseincommunicationsystems...............................4Sourcesofnoise...............................................................................................5Theconceptofnoisefigure............................................................

3、...............6Noisefigureandnoisetemperature.............................................................72.NoiseCharacteristicsofTwo-PortNetworks.........................8Thenoisefigureofmulti-stagesystems.....................................................8Gainandmismatch..........

4、................................................................................9Noiseparameters.............................................................................................9Theeffectofbandwidth.............................................................................

5、.....103.TheMeasurementofNoiseFigure..................................................11Noisepowerlinearity......................................................................................11Noisesources................................................................................

6、...................11TheY-factormethod........................................................................................12Thesignalgeneratortwice-powermethod.................................................13Thedirectnoisemeasurementmethod..........................................

7、.............13Correctednoisefigureandgain....................................................................14Jitter..................................................................................................................14Frequencyconverters.........................