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1、AbstractAbstractMillimeter-waveswitchiswidelyappliedinthefieldsofradar,communications,navigation,surveyingandelectroniccountermeasures,playsacentralroleinthecontrolsystemsofmillimeterwave,PINswitchhasmanyadvantages,suchassimplestruchture,smallsize,highperf
2、ormance,lowcostandsoon,occupiesanextremelyimportantroleinthemillimeter-waveswitch,soPINdiodeswich’sresearchworkisveryimportant.Inthisdissertation,underthesonsiderationoftherequirementsoflowinsertionloss,highisolation,basedonthetransfermatrixandunilateralfi
3、nlinetheory,itdiscussthefinlinejunctionstructurewiththerectangularwaveguideequivalentsimulationmethod;basedonmultiplePINdiodecasademethod,itmadeanin-depthstudytoachievetheswitchwithlowinsertionlossandhighisolationperformance,andwesuccessfullydesignedaW-ban
4、dsinglepolesinglethrowandsinglepoledoublethrowsswitchwithfiltermethod.Thetestresultsshowusthatthesinglepolesinglethrowswitch’sinsertionlosslessthan2.5dB,isolationmorethan35dBin90GHz~95GHz;thesinglepoledoublethrowswitchisdesignedwithY-shapedjunctionfinline,
5、withtheinsertionlosslessthan5.5dBandisolationmorethan24dBin90GHz~95GHz;Whilethesinglepoledoublethrowswitchdesignedwiththegradientfinlivejunctionstructureaquiresaninsertionlossofnomorethan3.8dBandanisolationofmorethan33dBin90GHz~95GHz,whichhasanimprovedsign
6、ificantlyperformancecomparedwiththetraditionalY-shapedjunctionfinlineswitch.Inaddition,usingMMICswitchchipandmicrostripprobetransitionstructure,aSPDTswitchsuccessfuldesignedwiththeinsertionlosslowerthan3.5dB,isolationhigherthan35dBin90GHz~95GHz.Aswitchgrou
7、piscomposedofthreeMMICSPDT,andplaysakeyroleinmuli-channelsystem.Keywords:millimeter-waveswitch,SPST,SPDT,finline,cascadeII万方数据目录目录第一章绪论.................................................................................................................11.1课题研究
8、目的及意义............................................................................................11.2毫米波开关发展动态............................................................................................21.2.1
