用于星载干涉雷达的Ku、Ka变频器设计

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1、MicrowaveRemoteSensingLaboratoryTheDesignandCharacterizationofaKu-andKa-bandDowncoverterforSpaceborneInterferometricRadarPaulSiqueira,HarishVedantham,EdinInsanic,RaziAhmed(Umass)TheDesignandCharacterizationofKu-andKa-bandDownconverterforSpaceborneInterferometricRada

2、rMichaelTope,GerryWalsh(JPL)2008ESTCMicrowaveRemoteSensingLaboratoryApproachoKu-bandsystem•Constructbreadboardmodeltounderstandbasiccharacteristics•Buildonbreadboardexperiencetocreateflightprototypemodel•Performfunctionaltests(noisefigure,gain,etc.)onprototypemodel•

3、Performancetestsonprototypemodel(phaseandamplitudestabilityovertemperature)•UseprototypemodelinaworkinginterferometricsystemoRepeataboveforKa-bandsystemTheDesignandCharacterizationofKu-andKa-bandDownconverterforSpaceborneInterferometricRadar2008ESTC2MicrowaveRemoteS

4、ensingLaboratoryDesignSpecificationsDesignConstraintKu-bandDDCKa-bandDDCSignalBandwidth20MHz20MHzEffectiveNoiseBandwidth<30Mhz<30MHzInputFrequencyRange13275–13295MHz34975–34995MHzOperatingTemperature-10to50degreesC-10to50degreesNoiseFigure<4.5dB<4.5dBOutputFrequency

5、Range5-25MHz5-25MHzChanneltoChannelIsolation>80dB>80dBInput/OutputVSWR<1.5:1<1.5:1RelativeChanneltoChannelPhaseStability0.050degreesRMSoverBW0.050degreesRMSoverBWReceiverPhaseVariationoverBestQuadraticFit3degRMSoverBW3degRMSoverBWReceiverAmplitudeVariation2dBoverBW2

6、dBoverBWReceiverAmplitudeVariationoverBestLinearFit0.3dBRMSoverBW0.3dBRMSoverBWInputSignalRange-100to–65dBm-100to–65dBmDDCEndtoEndGain65to70dB65to70dBImageRejection>30dB>30dBTheDesignandCharacterizationofKu-andKa-bandDownconverterforSpaceborneInterferometricRadar200

7、8ESTC3MicrowaveRemoteSensingLaboratoryIm{E}E2Cross-TrackInterferometryE1BRe{E}EE12Im{E}E1E2*
Re{E}rangetotargetH#!"%1=sin'$a2(&
B$$#&&1lookanglez=H"cos(!sin())ambiguity%%a2
B''zTheDesignandCharacterizationofKu-andKa-bandDownconverterforSpaceborneInterferometricRadar

8、2008ESTC4MicrowaveRemoteSensingLaboratoryPhaseMeasurementAccuracyWSOA,Ku-band6.4mSRTM,C-band60m222#dz%#dz%2#dz%#dz%2#dz%2#dz%2''((22''((22