continuously tunable dual-mode bandstop filter amir ebrahimi-匠人.pdf

该【continuously tunable dual-mode bandstop filter amir ebrahimi-匠人 】是由【刘备文库】上传分享，文档一共【3】页，该文档可以免费在线阅读，需要了解更多关于【continuously tunable dual-mode bandstop filter amir ebrahimi-匠人 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。,-ModeBandstopFilterAmirEbrahimi,Member,IEEE,ThomasBaum,Member,IEEE,JamesScott,Member,IEEE,andKamranGhorbani,SeniorMember,IEEEAbstract—Avaractor-basedtunablebandstop??lterisbasedonadual-modecircuitdevelopedbyintroducinginductiveandcapacitivecouplingsintoanotch?,?–×,—Bandstop?lter,dual-mode?lter,second-order?lter,tunable??lters.(a)Introducinginductiveandcapacitivecouplingstothenotch?lter.(b)Proposedbandstop?,withtheadventofwirelessstandardsusingNseveralfrequencybands,thereisanessentialrequirementbyintroducinginductiveandcapacitivecouplingsintothepatibil-in/outputresonatorsofanotch??guringtonewfrequencybands[1].?ltersareusefulblocksinmanyofthesepreviousdesigns,,thereisapar--layerfabrication,?gurationsandmethodshaveoffersmore?exibilityindesigningthecouplingcoef?cient,beendevelopedfortunablebandstop?lters[1]–[8].pactin[1]incorporatesλ/2coupled-?[2]and[3],lumped-?,,three-[3]andprecisepositionadjustmentshouldbeperformedtoTheproposed?[4],capacitivecouplingsbetweentheseriesLCresonatorsoftheahighrejectiontunablestopband?lterisdesignedusingdegenerative-polenotch?(a)[2].[9],introducingthecouplingsseparatesthein[5]and[6]usingmicrostrip-line-coupledcavityresonatorstwopolesofthe?lterresultinginadual-,plicated?lter[9],[10].TheJ12invertercanberealizedwitha90°[7]fortuningdistributedcoupled-linebandstop?,respectively,Nevertheless,thecoupled-pat-(b).[11]bandstop?lterisdesignedbytunabledefectedgroundres-Z0onatorsloadedwithbariumstrontiumtitanatevaractorsin[8].ZT=√(1)However,this?=√0Thisletterpresentsadual-modevaractortunabletwo-L(2)ω0g1g2polebandstop?-modecircuitisdesigned1C=(3)ManuscriptreceivedFebruary20,2018;acceptedMarch28,(Correspondingauthor:AmirEbrahimi.)TheauthorsarewiththeSchoolofEngineering,RoyalMel-whereg0–g3aretheelementvaluesofthelow-pass?l-bourneInstituteofTechnology,Melbourne,VIC3001,Australia(e-mail:terprototype,ω0isthecentralfrequencyofthe?lter,amir.******@).Colorversionsofoneormoreofthe?guresinthispaperareavailableZ0istheterminationimpedance,andisthefractionalonlineathttp://ieeexplore..,usingthestandardcoupled-resonators?lterDigitalObjectIdenti?.2821841theory,theelementvaluesofthe?(b)are1531-1309?,butrepublication/.,??,:d1=,w1=,d=d=d=.d=.d=.w=.calculatedas[11]24542mm,371mm,642mm,35mm,l1=,l2=20mm,t=,l3=,andl4==kL(4)L1=(1?k)L(5)CM=kC(6)C1=(1?k)C(7)wherekisthenormalizedcouplingcoef??lterisdesignedbyreplacingtheC1andCMcapacitorswithvaractordiodes,whereC1mainlycontrolsthecenterfrequencyandCMisusedtocontroltherejectionlevel[7].However,(b).(a)InductivetraceingroundplanerealizingLMandit’scircuitMmodel.(b),(a),seriescapacitors,,themicrostripsectionCCandequatingtheTcounterpartmodelsofthecapacitorsλ/(b)and2(a),=(8)2Ck+(1)–(11).The?,thetuningisCkCb=(9)+CjTheinitialdimensionsofthemetallictraceimplementingLMwhereCkandCjareintermediatevariablesgivenbyareobtainedusingtheclosed-formequationsformicrostripinductorsin[12].Then,thedimensionsareoptimizedby(1+C=(a)usingADSMomentum,k?(+)(10)?(k)2isto?=C.(11)1jkLikewise,equationsin[12],thedimensionsareoptimizedbysimulatingthestructureTheCvalueisobtainedfrom(3)(b)and?ndingthetransmissionzerofrequencyω,(b).zwhereL1isfoundbyknowingLM,Ca,.Forvalida-tion,aButterworthbandstop?=18%.TheequivalentcircuitThe?lterinFig.==L2=,theachievablerejectionofthe?lterwould27nH,LM==,andCb=?,ic(EM)andcircuitsimulationsintheKeysightduetolowerlossathigherfrequencies[9].,wheretheL1inductorsr=,,,,.:CONTINUOUSLYTUNABLEDUAL-??lterandstate-of-the-?lterprototype.(a)Frontview.(b)-,petitiveperformanceoftheproposed?-ordertunablebandstop?lterhasbeenpresentedbinationoflumpedelementsandmicrostrip--baseddesignmethodhasbeendevelopedforsynthesizingtheelementvaluesofthe?,highrejectionlevel,[1],,,,“RFtunablebandstop?lterswithconstantbandwidthbasedonadoubletcon?guration,”.,,,–1265,.[2]Y.-,“Lumped-elementfullytunablebandstop?ltersforcognitiveradioapplications,”.,(solidline),,–2468,.(dashedline)S-parametersofthe?(V1,V2)valuesfordifferentcases[3]C.-,,,“Tunable500–1200-MHzdual-bandare:(15V,35V)forCase1,(,30V)forCase2,(6V,11V)forCase3,andwidebandwidthnotch?ltersusingRFtransformers,”IEEETrans.(,5V)forCase4,and(,).,,,–1862,.[4],“Tunable4-poledual-notch?,”.,,,–1314,?lterbyvaryingtheCaandCb[5],,,,“-to-bandstoprecon?gurable?lterwithindependentbandwidthsandtunableresponseshape,”.,,,–3779,[6],,,,,Aprototypeoftheproposed?lterisfabricatedandtested“Newbandstop?ltercircuittopologyanditsapplicationtodesignofabandstop-to-bandpassswitchable?lter,”.,,,–1123,??neonBB837surface-mounteddiodes[7],S.-,,“Compactlow--bandbandstop?lterwithminiatureRF-MEMSswitches,”=10kresistorsandCdc-block=.,,,–1895,-parameters[8]Y.-,J.-,,,,“Tunableslottedgroundstructuredbandstop?lterwithBSTvaractors,”ofthe?lter,wheretheseriesparasiticresistanceoftheIETMicrow.,AntennasPropag.,,,–876,’sSPICEmodelisconsidered[9],,-Sarawi,,insimulations[13].pactsecond-orderbandstop?lterbasedondual-plemen--ringresonator,”.,,?,–573,%.The[10],,-Sarawi,,measuredstopbandreturnloss(SBRL)ofthe?lterislessthan“Dual-plementaryelectric-,whereasthepassbandinsersionloss(PBIL)islessloadedontransmissionline:Analysisandapplications,”.,,,2014,[11],,NJ,USA:Wiley,?lterwithrespecttothepreviousones,usingthin[12]J.-,MicrostripFiltersforRF/Microwavemeanderedmicrostripinductorsinsteadofthelumpedones,Applications,,NJ,USA:Wiley,[13](2017).In?neon.[Online].Available:https://