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首页 Compact siw transversal filter with triple-mod…

Compact siw transversal filter with triple-mode microstrip resonator.pdf

Compact siw transversal filter…

上传者: 沸腾的雪2012 2014-04-01 评分 5 0 149 20 678 暂无简介 简介 举报

简介:本文档为《Compact siw transversal filter with triple-mode microstrip resonatorpdf》,可适用于IT/计算机领域,主题内容包含CompactSubstrateIntegratedWaveguide(SIW)TransversalFilterwithTripleModeMic符等。

CompactSubstrateIntegratedWaveguide(SIW)TransversalFilterwithTripleModeMicrostripResonatorWeiShen,WenYanYin,,XiaoWeiSun,andJunFaMaoCenterforMicrowaveandRFTechnologies,SchoolofElectronicInformationandElectricalEngineering,ShanghaiJiaoTongUniversity,Shanghai,ChinaweishensjtueducnCenterforOpticalandElectromagneticResearch,StateKeyLabofMOI,ZhejiangUniversity,ChinawyyinzjueducnandwyyinsjtueducnInstituteofMicrosystemandInformationTechnologyofChineseAcademyofSciences,Shanghai,ChinaAbstractAnovelfourthordersubstrateintegratedwaveguide(SIW)transversalfilterwithtriplemodemicrostripresonatorispresentedThetriplemoderesonatorisetchedonthetopmetallayerofSIWcavity,socompactsizecanbeachievedThecouplingschemeoffilterexhibitstransversalcharacteristic,andthedesignprincipleofthefilterissimpleThefilterhascompactsizeandwidestopbandincomparisonwithconventionalSIWfiltersAnopenstubwasaddedontheporttogetbetterfrequencyselectivityTwoSIWfiltersamplesaredesignedandfabricated,withgoodagreementachievedbetweenthemeasuredandthesimulatedSparametersIndexTermsbandpassfilter,couplingmatrix,substrateintegratedwaveguide(SIW),Sparameters,transmissionzeros,triplemodeIINTRODUCTIONWiththedevelopmentofwirelessandmobilecommunicationsystems,bandpassfilterswithbetterfrequencyselectivityandcompactsizehaveattractedmuchattentionMicrostripdualmodefilterswereproposedforapplicationsincommunicationsystemsandEachdualmoderesonatoractsastworesonators,therefore,thesizemaybereducedincomparisonwithconventionalmicrostripresonatorAsthedualmodefilterproposedin,atransmissionzerocanmovefromthelowertohigherstopbandwiththevariationoflengthofopenstubAtriplemodefilterswithellipticfunctionandharmonicsuppressionwaspresentedinSubstrateintegratedwaveguide(SIW)filtershavebeenstudiedextensively,whichisduettotheirlowloss,lowcostandeasyintegrationwithotherpassivecomponentsSomeplanarSIWfilterswithellipticfunctionhavebeenreportedinEachofthemtakesplanarSIWcavitiesasresonators,sothesizesoffiltersarelargeincomparisonwithmicrostripfiltersInthispaper,weintroduceatriplemoderesonatorintoSIWfilterdesigntoachievecompactsize,whichisetchedonthetopmetallayerofSIWcavityTheproposedfilterhastwotransmissionzeros,butthetransmissionzerolocatedatlowerstopbandisfarawayfrompassbandTherefore,anopenstubisintroducedontheporttogetbetterfrequencyselectivityTheelectricresponseisexaminedbytheoryofcouplingmatrixTwofiltersampleswithcompactsizes,betterfrequencyselectivityandwidestopbandwasfabricatedandmeasuredsoastovalidatetheeffectivenessofourproposedfiltersIIDESIGNOFFILTERATriplemodeResonatorThelayoutofatriplemoderesonatorisshowninFig(a),anditsequivalentlayoutsofoddandevenmodesareshowninFig(b)TheresonantfrequenciesofoddandevenmodescanbecalculatedbyoddcfLε=(a)oddcfLε=(b)()evencfLLε=(c)Whereevebfisresonantfrequencyofevenmode,andoddfandoddfareresonantfrequenciesoftwooddmodes,respectively(a)(b)FigLayoutof(a)triplemoderesonatorand(b)itsequivalentoddandevenmodes,respectivelyBSIWFilterwithTriplemodeResonatorProceedingsofAsiaPacificMicrowaveConferenceCopyrightIEICEFRBThetopviewandcouplingschemeofthefourthorderwithtriplemoderesonatorisshowninFigs(a)and(b),respectively(a)(b)Fig(a)Topviewand(b)couplingschemeofthefourthorderfilterwithtriplemoderesonator,respectivelyAsshowninFig(b),thecorrespondingcouplingmatrixMcanbewrittenas=SSSSSLSLSLSLLLLLMMMMMMMMMMMMMMMMMMMMMThenodaladmittancematrixisgivenby:{}Ω==jGWMVAVjI()Here,Gisa()()NNmatrixwhoseonlynonzeroentriesare,NNGG==,MisthecouplingmatrixWisadiagonalmatrixof()()NN,with,NNWW==,andkkW=TheSparametersaredeterminedby,SjA=,,NSjA=(a,b)TheelectricfieldachievesmaximumattheopenendsoftriplemoderesonatorHowever,theelectricfieldofSIWcavityisminimizedattheareaundertheopenendsTherefore,thecouplingsbetweenSIWandtriplemoderesonatorisweakItscorrespondingcouplingmatrixMisgiveby=MFigSynthesisfrequencydependentSparametersforcouplingmatrixesFigsshowsthesynthesizedSparametersforcouplingmatrixMThen,twotransmissionzerosareobtained,whichlocateatandGHz,respectivelyDESIGNANDRESULTSTheelectricfielddistributionoffilterisshowninFigLandWaremainlyusedtocontrolthebandwidthofthefilterThesimulatedSparametersoffilterfordifferentvaluesofL,W,andLareplottedinFig(a),(b),and(c),respectivelyToachievesharpskirtatthelowerstopband,anopenstubisusedtoobtainatransmissionzerolocatedatthelowerstopbandLisusedtocontrolthelocationofthetransmissionzeroAsFig(a)shows,thebandwidthwillincreasewithLincreasingMeanwhile,thetransmissionzerolocatedatupperstopbandwillmoveclosetopassbandAsshowninFig(b),thebandwidthbecomesnarrowwithWdecreasingThismeansthecouplingsbetweensourcesorloadandtriplemoderesonatorwillincreasewithLorWincreasingTheparameterWisgenerallylargerthanWslightlyThisensureslowradiationofSIWcavityWecantunethecouplingsbetweensource(load)andSIWortriplemoderesonatorindependentlybytuningLandLInFig(c),wecanseethattwotransmissionzeroscanbeobtainedThesecondonewillmovetopassbandwithLshorteningFigTheconfigurationofthefilterwithtriplemoderesonator(a)(b)FigThesimulatedSparametersfordifferentvaluesof(a)L,(b)W,and(b)L,respectively(a)(b)FigThe(a)photographand(b)geometricalsizesofthefabricatedfilter,respectivelyTwofiltersampleswerefabricatedonsinglelayeredprintedcircuitboard(PCB)withthethicknessofmm,anditsrelativepermittivityisε=Fig(a)and(b)showthephotographofthefabricatedfilteranditsgeometricalsizes,wherethewidthsoftheinputandoutputΩmicrostriplinesaresettobemm,respectivelyThediameteroftheviaholesismmThenarrowbandandwidebandofSparametersofthefilterareplottedinFigs(a)and(b),respectivelyThemeasuredinbandreturnandinsertionlossesarebelowdBandaboutdB,respectivelyAtransmissionzerosispositionedatGHzAndthesecondpassbandappearsatGHz,whichistimesofthecenterfrequencyIthaswiderstopbandincomparisonwithconventionalSIWfiltersBecausetheharmonicpassbandisgenerallylocatedattimesofcenterfrequency,whichisduetotheTETEmode(a)(b)FigThesimulatedandmeasuredSparametersoftheproposedfilterin(a)narrowbandand(b)wideband,respectivelyToimprovethefrequencyselectivityoflowstopband,anopenstubisaddedatportThen,anadditionaltransmissionzerowillappearatlowerstopbandThemeasuredSparametersareplottedinFigThemeasuredinsertionandreturnlossesareandbelowdBThreetransmissionzeroslocatedat,andGHz,respectivelyTheslightshiftofcenterfrequencyismainlycontributedtothefabricatedtoleranceTheproposedfilterwithmicrostriptriplemoderesonatorisverycompactincomparisonwithconventionalSIWfiltersThefilterhasbetterfrequencyselectivityandwidestopbandFigThesimulatedandmeasuredSparametersofthefilterwithanopenstubⅣCONCLUSIONInthispaper,acompactSIWtransversalfilterwithtriplemoderesonatorispresented,whichisetchedonthetopmetallayerofSIWcavityAnopenstubisaddedontheporttoimprovethefrequencyselectivityThetransversalfilterhasbetterfrequencyselectivityandwidestopbandincomparisonwithconventionalSIWfiltersTwofiltersampleswerefabricatedonsinglelayerPCBtechnologyUndersuchcircumstances,betterfilterperformanceisachievedasdemonstratedbyoursimulatedaswellasmeasuredSparametersACKNOWLEDGMENTThisworkwassupportedbytheNationalBasicResearchProgramofChinaunderGrantCBREFERENCESLZhuandKWu,‘‘Ajointfieldcircuitmodeloflinetoringcouplingstructuresanditsapplicationtothedesignofmicrostripdualmodefiltersandringresonatorcircuits,’’IEEETransMicrowTheoryTech,vol,no,pp,OctJRLee,JHCho,andSWYun,‘‘Newcompactbandpassfilterusingmicrostripresonatorswithopenstubinverter,’’IEEEMicrowGuideWaveLett,vol,no,pp,DecWShen,XWSun,andWYYin,“Anovelmicrostripfilterusingthreemodesteppedimpedanceresonator(TSIR),”IEEEMicrowWirelComponLett,vol,no,pp,Dec,XPChenandKWu,“Substrateintegratedwaveguidecrosscoupledfilterwithnegativecouplingstructure,”IEEETransMicrowTheroyTech,vol,no,pp,ZCHao,WHong,XPChen,JXChen,KWu,andTJCui,‘‘Multilayeredsubstrateintegratedwaveguide(MSIW)ellipticfilter,’’IEEEMicrowWirelessComponLett,vol,no,pp,FebTMShen,CFChen,TYHuang,andRBWu,“DesignofverticallystackedwaveguidefiltersinLTCC,”IEEETransMicrowTheroyTech,vol,no,pp,AugBJChen,TMShen,andRBWu,“DualbandverticallystackedlaminatedwaveguidefilterdesigninLTCCtechnology,”IEEETransMicrowTheroyTech,vol,no,pp,JunWShen,LSWu,XWSun,WYYin,andJFMao,“Novelsubstrateintegratedwaveguidefilterswithmixedcrosscoupling(MCC),”IEEEMicrowWirelessComponLett,Vol,No,–,NovSAmari,URosenberg,andJBornemann,“Adaptivesynthesisanddesignofresonatorfilterswithsourceloadmultiresonatorcoupling,”IEEETransMicrowTheoryTech,vol,pp–,Aug<<ASCIIEncodePagesfalseAllowTransparencyfalseAutoPositionEPSFilestrueAutoRotatePagesNoneBindingLeftCalGrayProfile(GrayGamma)CalRGBProfile(sRGBIEC)CalCMYKProfile(USWebCoatedSWOPv)sRGBProfile(sRGBIEC)CannotEmbedFontPolicyWarningCompatibilityLevelCompressObjectsOffCompressPagestrueConvertImagesToIndexedtruePassThroughJPEGImagestrueCreateJobTicketfalseDefaultRenderingIntentDefaultDetectBlendstrueDetectCurvesColorConversionStrategyLeaveColorUnchangedDoThumbnailstrueEmbedAllFontstrueEmbedOpenTypefalseParseICCProfilesInCommentstrueEmbedJobOptionstrueDSCReportingLevelEmitDSCWarningsfalseEndPageImageMemoryLockDistillerParamstrueMaxSubsetPctOptimizetrueOPMParseDSCCommentsfalseParseDSCCommentsForDocInfofalsePreserveCopyPagetruePreserveDICMYKValuestruePreserveEPSInfofalsePreserveFlatnesstruePreserveHalftoneInfotruePreserveOPICommentsfalsePreserveOverprintSettingstrueStartPageSubsetFontstrueTransferFunctionInfoRemoveUCRandBGInfoPreserveUseProloguefalseColorSettingsFile()AlwaysEmbedtrueAbadiMTCondensedLightACaslonItalicACaslonRegularACaslonSemiboldACaslonSemiboldItalicAdobeArabicBoldAdobeArabicBoldItalicAdobeArabicItalicAdobeArabicRegularAdobeHebrewBoldAdobeHebrewBoldItalicAdobeHebrewItalicAdobeHebrewRegularAdobeHeitiStdRegularAdobeMingStdLightAdobeMyungjoStdMediumAdobePiStdAdobeSansMMAdobeSerifMMAdobeSongStdLightAdobeThaiBoldAdobeThaiBoldItalicAdobeThaiItalicAdobeThaiRegularAGaramondBoldAGaramondBoldItalicAGaramondItalicAGaramondRegularAGaramondSemiboldAGaramondSemiboldItalicAgencyFBBoldAgencyFBRegAGOldFaceOutlineAharoniBoldAlgerianAmericanaAmericanaExtraBoldAndaleMonoAndaleMonoIPAAngsanaNewAngsanaNewBoldAngsanaNewBoldItalicAngsanaNewItalicAngsanaUPCAngsanaUPCBoldAngsanaUPCBoldItalicAngsanaUPCItalicAnnaArialAlternativeArialAlternati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