Low Noise Amplifier Design0302 射频放大器设计

.1，LowNoiseAmplifierDesign，Session8，2，IntroductionofNoise， highfrequencynoisethermal (johnsnornyquist ) noisethermalvirationofbounddcharges.shotnoiserandsofluctuationsofchargearriers.lowfrr noisenoisepowervarisenverselywithhfrequecy .lnacareshighefrequeniseonly！3、 noisefactorandnoisefifififififies si=inputsignallpowerso=outputsignalpowerni=standardinputthermalnoiseno=tototata fierexcessnoisepowerg=ampfiefiererpowergain noise factor，noise figure (ni=kt0b=-174 DBM/Hz带宽(dbhz ) t=t0=290 k ).4， nisefiguresofatwo-port networks noise parameters : (4values ) fmin : miniumnoisefactor s=min rn=rn/z 0: normalizednoiseresise qminiminimum-noisesourcereflectoncoefficient f=fmin，5，NoiseParametersoftheTransistor，GaAs feta TF-10136 noise参数，bias深度siemenensdiscreterfemiconductors！ BFP420！ sinpnrfsiegetgroundedemittertransistorsot 343！ VCE=1VIC=1.5mA！ 公共目标参数： f ebrary 1998 # GHS mar 50！ fS11S21S12S22！ ghzmagangmagangmagangmagangmagang0. 0100.9253-0.95.283179.70.00100194.70.9962-0.50.1000.9234-7.45.275374.70.011785.70.9935-4.11.0000 7248.10.8140-37.32.0000.6826-129.43.080808.70.13121.70.5819-60.93.0000.6464-171.62.26461.10.13736.70.4292-76.24.0000.6509155.66 84-96 25.0000.688132.51.38918.60.1269-7.30.3011-115.36.0000.7115116.01.1481.50.1241-7.70.3095-142.2！ 什么？ fFminGammaoptrn/50！ ghzdbmagang-0.4500.710.32210.350.9000.760.51340.271.8001.070.36780.202.4001.170.36970.193.0001.430.371320.124.0001.700.41-1730 siemenensagsemiconductor组，Munich，touchstone-formats-parametererswithnoisedata，7，noiseparameterersfromnonlinearmodeil， nonlineartransistormodel determinebiasingcircuits，SmallSignalAnalysis，Noisemeasurements， optimumnoisefigururematch : gmnminimmnoisefigure : nfminnoiseresistance : rn，通常其结果的精度不一定充分，请在设计时参考，8， constannoisfigurecirclesponsofttransistor，LetF=FiFmin|GS-CFi|=rFi是GS-Plane上的圆方程式，也称为中心、半径、where、9 NFmin，Gmin，NFmin-1dB，GS-Plane，NFmin-2dB，NFmin-3dB，rn越大，离Gmin越远，NF的上升越快。 10、noisecirclesv.s.availablegaincircles、NFandGA，即VSWR1、Trade-offisneeded兼容！ GMS，Gmin，NF，GA，GS-Plane，11，InductorSeriesFeedbackMethod，BFP420(IC=1.5mA，VCE=1V)f=2GHz，Stabilizingload，Emitterfeedbackinductor 通过增加12 Induct