清大微波电路与ADS实作【第五点二集】5-2LNA Design(TwoStageLNA)
20页1、Balance LNA-900INISO-900INISOR=50 OhmR=50 OhmHybrid90Hybrid90RF InputRF OutputPush-Pull LNA1800INISO1800INISOR=50 OhmR=50 OhmHybrid180Hybrid180RF InputRF OutputTransmission Line Hybrid270909090port1port4port3port2Z0=70.7Rat Riceport1port2port390port4Z=50 Z=50 250250Branch Line CouplerBalance LNA Integrated Xinger brand hybrid and PHEMT ATF54143BO JENSEN,”Build LNAs With An Integrated Approach” pp.7985,DECEMBER 2002,MICROWAVES & RFPerformance of Balance LNA Design B with Behave Hybrid90m1 freq= d
2、B(S(2,1)=16.651.00GHzm2 freq= nf(2)=1.441.00GHz0.20.40.60.81.01.21.41.61.80.02.0-5051015-1020-80-70-60-50-40-30-90-20freq, GHzdB(S(2,1)m1dB(S(1,1)dB(S(2,2)dB(S(1,2)nf(2)m2GaAs MMIC MESFET Limiter/LNAJim Looney, David Conway, and Inder Bahl,” An Examination of Recovery Time of an Integrated Limiter/LNA,“ pp. 8386 March 2004 IEEE Microwave MagazineBias Circuit Design By Curve Trace By ADS Transistor UitilityBy Al Ward and Bryan Ward “A Comparison of Various Bipolar Transistor Biasing Circuits Tran
3、sistor Biasing Circuits”, APPLIED MICROWAVE & WIRELESSPassive Bias CircuitVBRERB1VccRRBRB2VccVccVccVccRCRCRCRB RBbacRCRB1RB2RCRB2RB1dePercent Change in Ic vs. TemperatureabcdeDesign Bias Circuit with Curve TraceVBVc=8V Ic=10mADC_BJT SIM1VCE_points=31VCE_stop=15.0VCE_start=0IBB_points=12IBB_stop=150 uAIBB_start=25 uABJT Curve TracerBaseCollectorpb_hp_AT41411_19931124 Q1DisplayTemplate disptemp1 “DC_BJT_T“TempDispInserttemplate BJT _curve_traceKey in proper rangeData Display of Curve Trace24681012
4、140160.0000.0050.0100.0150.020-0.0050.025SIM1.IBB=2.500E-5SIM1.IBB=3.636E-5SIM1.IBB=4.773E-5SIM1.IBB=5.909E-5SIM1.IBB=7.045E-5SIM1.IBB=8.182E-5SIM1.IBB=9.318E-5SIM1.IBB=1.045E-4SIM1.IBB=1.159E-4SIM1.IBB=1.273E-4SIM1.IBB=1.386E-4SIM1.IBB=1.500E-4VCEIC.im1m1 indep(m1)= plot_vs(IC.i, VCE)=10.33m SIM1.IBB=0.0001058.000 Collector Current versus Bias CurvesEqn RC=(15-indep(m1)/10mARC700.0 RB77.40 kVBm2,m3787.6 mEqnRB=(indep(m1)-VBm2,m3)/indep(m2)40.00u 60.00u 80.00u 100.0u 120.0u 140.0u20.00u160.0u0.0
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