v波段宽中频正交混频器与应用分析

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1、万方数据东南大学硕士学位论文intermediatefrequencybandfromDCto5GHz；Thetypicalconversionlossvalueis1ldBundertheconditionoflocaloscillatorfrequencyfixedat55GHz，radiofrequenciessweepingfrom52GHzto60GHz．TheIFbandwidthofthedesignedVQmixeriscomparablewiththatofsimilarMMICproductsabroad．Finally,comparedwiththeresu

2、ltsofsimulation，theperformanceofmixeraffectedbythebalanceofamplitudeandphasewasanalyzedindetail．3．Onthebasisofthedevelopedsinglebalancedmixer,theimplementationofI／QmixerthatLOsignalworksinphase，RFsignalinquadratureisfeasiblethroughthesimulationandvalidation．Then，anETjunctionwaveguide3dBsplitt

3、ersandanE．planebranchwaveguidecouplerweredevelopedandmeasured．Finally,aseperateV-bandIQmixerwasconstructedandtest．Thetestresultsshowthat：thetypicalconversionlossvalueofthemixeriS15dBatlowerband．17dBatupperbandundertheconditionofoscillatorfrequencyfixedat60GHz，radiofrequenciessweepingfrom55GHz

4、to65GHzandtheoutputIFbandfromDCto5GHz；ThetypicalLOtoRFisolationvalueis25dB．4．TheapplicationofV-bandI／Qmixeronimagefrequencyrejectionmixerhasbeencarriedonexperimentalstudy．AnimagerejectionmixerWasrealizedwiththeadditionofailIFquadraturebridge．Thoughtheexperiment，thetestresultdemonstratesthatth

5、eimagerejectionmixerhastheimagerejectionratiobetterthan15dBundertheconditionofIFfixedat100MHz，RFsweepingfrom54—57GHz，whiletheimagerejectionratioisbetterthan10dBwhenRFsweepsfrom54．62GHz．Inaddition，theprincipleandcharacteristicsofphase-shiftingsinglesidebandmodulatorbaseonI／QmixerWasanalyzed．Ke

6、ywords：splitters，couplers，wideIF,singlebalancedmixer,IQmixer,imagerejectionmixerIV万方数据目录摘；要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．IABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．III第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1研究背景和意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2国内外研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯21．3论文工作安排⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．4第2章毫米波混频器理论分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯72．1肖特基势垒二极管及其混频原理⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯72．1．1肖特基势垒二极管⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯72．1．2二极管混频原理⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯92．2混频器的分类⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．102．3单平衡混频器的原理