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1、课件之家精心整理资料--欢迎你的欣赏DESIGNANDPERFORMANCEOFANOVELBROADBANDUNIPLANARBALANCEDSUBHARMONICMIXERABSTRACT:Anovelwidebanduniplanarbalancedsubharmonicmixerisproposedanddemonstrated.Themixerisbasedonthebroadbandtaperedcoplanar-waveguide(CPW)DC-blockfilter,andthein-phaseandout-o
2、f-phaseT-junctionsareinterconnectedthroughapairofquarter-wavelengthslotlines.ThefabricatedsubharmonicmixerhasanRFbandwidthofmorethanoneoctavefrom12to28GHzwithaconversionlossrangingfrom8.5to12.5dBforLOsignalsfrom6.1to14.1GHzwithapowerlevelof9.5dBm.ThemeasuredLO-to-RF
3、,LO-to-IF,andRF-to-IFisolationsarebetterthan15.5,34,and26.6dB,respectively..2005WileyPeriodicals,Inc.MicrowaveOptTechnolLett44:508–510,2005;PublishedonlineinWileyInterScience.DOI10.1002/mop.20681Keywords:balancedsubharmonicmixer;broadbanduniplanartechnology;coplanar
4、waveguide;slotline;microwaveintegratedcircuits1.INTRODUCTIONUniplanartechnologyhasreceivedconsiderableattentionwithregardtolow-costandhigh-performancemicrowaveintegratedcircuits(MICs)andmicrowavemonolithicintegratedcircuits(MMICs),especiallyinthemillimeter-waverange
5、[1–3].Thisisduetothemeritsnotrequiringviaholesforconnectingcircuitelementstotheground,eliminationofthebacksideprocesses,simplerealizationofseriesandshuntcircuitcomponents,easyintegrationwithsolid-statedevicesandotherlumpedelements,andlowsensitivitytosubstratethickne
6、ss[4].Furthermore,thistechnologyallowsflexiblecircuitdesignusingmixedtransmissionlinessuchascoplanarwaveguide(CPW),slotline,andcoplanarstripline.Subharmonicmixingisveryusefulatmillimeterwavefrequenciesduetotheavailabilityoflow-costlower-frequencylocaloscillators(LOs
7、).BalancedsubharmonicmixershavetheadvantagesoftheinherentLO-to-RFisolationandthereductionofLOnoiseandspurioussignals[5].Recently,afewbalancedsubharmonicmixersusingauniplanarstructurehavebeendeveloped[6,7].Asubharmonicdiodemixerusingauniplanarhybridwithadouble-Ybalun
8、wasproposedforlow-costbroadbandmillimeter-wavetransceiverdesign[6].ThehybridconsistsofacombinationofataperedslotlineT-junctionandataperedC
