d波段宽带混频器

《d波段宽带混频器》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、ABSTRACTABSTRACTInmodernmillimeter-wavecommunicationsystem,theperformanceofthemixerhasasignificantimpactonthereceiver.ThebroadRFbandwidthofthebroadbandmixercanexpandtheworkingbandofthereceiver.Therefore,researchonthebroadbandmixerissignificant.Mixersc

2、anbedividedintotwocategories:thefundamentalandharmonicmixer.Comparedwiththeharmonicmixer,thecharacteristicsofthefundamentalmixer,suchastheconversionloss,aremuchmorebetter.However,themillimeter-wavemixerworksatahighfrequency,whichmakesit'sdifficulttode

3、velopthelocal-oscillator.Somostofmillimeter-wavemixersbelongtoharmonicmixer.Withtheimprovementoftheprocessingcraftanddesign,local-oscillatorhasbeenrealizedinD-bandfrequencyband.Therefore,researchesonD-bandlow-lossfundamentalwidebandmixerbecomeparticul

4、arlyimportant.D-bandbroadbandintegratedcircuitmixerusingafin-line-suspendedmicrostriphybridconfigurationisdesignedwithUMS'sSchottkybarrierdiodesDBES105ainthisthesis.Finlineandsuspendedmicrostripmakeupa180degreeknotwhichprovidesawellisolationbetweenthe

5、RFandLOports.ThesignalofRFpassesthroughthewaveguide-to-fin-lineandRF-matchingstructuretothediode.ThesignalofLOpassesthroughthewaveguide-to-suspendedmicrostriptodiode.TheIFpowerisexportedthrougha5-orderChebyshevlow-passfilter.Thepackageofthediodehasatr

6、emendouseffectoncircuitperformanceatDband.AfterreviewingtheinformationabouttheSchottkybarrierdiodemodeling,athreedimensionmodelisbuiltup.Inthismodel,animpedanceboundaryisusedinsteadoftheSchottkydiodejunction.AD-bandfundamentalwidebandmixerisdesignedba

7、sisonthemodel.Thesimulationresultsareasfollows:ThereturnlossofRFportisgreaterthan10dBin110GHz~160GHz.ThereturnlossofLOportisgreaterthan10dBin131GHz~148GHz.Atthecenterfrequency140GHz,theisolationbetweentheLOandIFportis21dB.AD-bandfundamentalwidebandmix

8、erhasbeenfabricatedandtested.TheLOfrequencyis134GHzwiththepowerof7.5mW.Theconversionlossislessthan15dBII万方数据ABSTRACTwiththeRFsweptfrom110GHz~155GHz.Theconversionlossislessthan10dBwiththeRFfrequencyfrom115GHz~137GHz.Keywords:D-band,wideband,mix