2Cylindrical Polarimetric

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1、CylindricalPolarimetricPhasedArrayRadar:AMulti-FunctionDemonstratoranditsCalibrationCPPARTeamUniversityofOklahomaAdvancedRadarResearchCenter,Norman,OK,USAPage1CPPARTeamAcknowledgements•JerryCrain•RachelNorris•JonChristian•BobPalmer•DickDoviak•DamonSch

2、midt•CalebFulton•DanThompson•ShayaKarimkashi•KalenWilliams•RedmondKelley•MarkYeary•LeiLei•AllenZahrai•MattMcCord•GuifuZhang•IsaacMeier•RockeeZhang•JohnMeier•DusanZrnic•AliMirkamali•WascarBocangelThankstoeveryone!Page2Outline•Overview:MPARGoalsandDrivi

3、ngScience–AntennaRequirements(FastOverview)–FundamentalQuestionsandChallenges(FastOverview)•Review:CPPARDemonstrator–HardwareandAntenna•CPPARCalibrationTechniques–OverallTimelineandPlans–Far-FieldTestingDetails–MutualCouplingCalibrationDiscussion–Earl

4、yResultsandNeedforAdvancedPatternAnalysis/Synthesis–Details:PhaseModeAnalysisandSynthesis–QuickSoftwareUpdate•ConclusionsandFutureWorkPage3FundamentalChallenges:WhatisRequired?~j~2RTATeDPRTATd•Intuitively(aftercorrections):HHHHVHHVHVVVZSDR

5、b~j~2RTATeDPRTATd–Loweffectivecross-polarizationVHHHVHVVHVVVS2–Lowtwo-waysidelobesTˆRˆejDPTˆRˆdHHHHHVHVSZDRb2–GoodH/VmainbeammatchingTˆRˆejDPTˆRˆdVVVVVHVH•Programmatically:STx~20-35dB,Rx~35-45+dBsidelobesAntennametric/propertyThr

6、esholdObjective(ifbetter)forplanar,~40dBforcylindricalAZandELbeamwidths,deg.1.022AZscanrange,deg.(if4faceplanar)-45to45SLLSLL1/GSLL000ELscanrangew/polarimetry,deg.-1to20-1to30ELscanrange,otherfunctions,deg.to6020kelements45-50+dBpossiblewithScan

7、resolution,deg.1.00.510%RMSerror(6bitamp/phase)and35Close-insidelobes(two-way),dB<-34(first3)<-54(first)dBTaylorweight,solongassystematicMid-rangesidelobes(two-way),dB<-52dB<-54@2°to<-68@10°errorsnotpresentFar-outsidelobes(two-way),dB<-52dB<-80dBbeyon

8、d10°BiasinZestimate,dB<0.1DRBiasinrestimate<0.005<0.001HVLargelyinheritedfromsatisfyingZDRErrorinKestimate,per[16]def.<5%~0DPspecHandVmatching@beampeak,dB<~0.05HandVmatching@-20dB,dB<1<0.5Cross-polarisolation(ATSR),dB<-22<-25Cross-polarisolati