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284Vol.28,No.4200611CHINESEJOURNALOFLOWTEMPERATUREPHYSICSNovember20063(:60471001).:2006204226;:2006208210CDMA31,1000841,100084H,,,Q,.,,,.,HQ,/.H,2YBCOCDMA12.832MHz,1.6%.70K0.28dB,-15.5dB,75dB,30dB/MHz,20dB/MHz.:,HPACC:7470V4280C,7870G120,,.,,[1,2].,.,1/2[34]1/4[5];[34][6].1/4,,,1/2.H1/2.LaAlO3MgOAl2O3,MgOAl2O3,,,.832MHz,,LaAlO3.CDMA,H,YBCO/LaAlO312,1.6%.77K,,.2HCDMA,[7]H,,.H,,.HQ().,.(1)1(a)H,.,.,L.1(b)L.,,,,,10%.,,,.,.,.1(c)L,,.1(b)1(c),HL,,.1(a)H,(b)HL,(c)L(2),.,,,.,,.H2.2H,,0.81.6mm,,1.22.4mm.,,.0.8mm,,0.82.4mm0.02,.(3)Q,,Q./,,Q,.3(a)dh,Q.,/,,.3(b)/,,f01,,f02.,f1=f02-f01=-0.2MHz.,HQ,.223283(a)Qd/h,(b)/,QQe=54.73,Qe=54.62.Q,.3(a),Q,.1QS11.,Q,,Q.1QS11Q148.6484.9164.0054.7349.5139.59S11/dB-1.9-5.9-11.4-17.7-13.9-8.03YBCO/LaAlO3H,38.6025.800.52mm3.Agilent8720ES.470K,,.0.28dB,-15.5dB,75dB,30dB/MHz20dB/MHz,.,3dB13.2MHz,.831.9MHz,0.5MHz..50.1,.,,,.454H,Q.H,,,3234:CDMA,.,,.,,,.,HQ,.HCDMA12,832MHz,1.6%.70K,.[1]YuanzhiLi,MichaelJ.Lancaster,FrederickHuang,2003IEEEMTT2SDigest,551.[2]GuoyongZhang,MichaelJ.Lancaster,FrederickHuang,2004IEEEMTT2SDigest,1117.[3]GenichiTsuzuki,ShenYe,andStuartBerkowitz,IEEETransactionsonappliedsuperconductivity,13(2003),261.[4]Hong,J.2S,McErlean,E.P.,Karyamapudi,B,Microwaves,AntennasandPropagation,IEEProceedings,151(2004),491.[5]GuoyongZhang,MichaelJ.Lancaster,andFrederickHuang,IEEETransactionsonmicrowavetheoryandtechniques,54(2006),559.[6]JiafengZhou,M.J.Lancaster,Huang.F,3(2003),1889.[7]MarinaS.Gashinova,MariaN.Goubina,GuoyongZhang,IgorA.Kolmakov,YaroslavA.Kolmakov,andIrinaB.Vendik,IEEETransactionsonmicrowavetheoryandtechniques,51(2003),792.[8]RandyW.Simon,RobertB.Hammond,StuartJ.Berkowitz,BalamA.Willemsen,ProceedingsoftheIEEE,92(2004),1585.[9]BalarnA.Willenisen,IEEETransactionsonappliedsuperconductivity,11(2001),60.[10]H.R.Yi,StephenK.RemillardandAmrAbdelmonem,IEEETransactionsonmicrowavetheoryandtechniques,51(2003),2290.[11]B.Wei,X.P.Zhang,K.Liu,etal.,PhysicaC.386(2003),551.[12],,25(2003),57.[13],,25(2003),105.ANHTSFILTERSUBSYSTEMFORCDMASYSTEMPiaoYun2LongWeiBinLiangYongZHangXiao2PingYinZHe2SHengCaoBi2SongGaoBao2Xin1DepartmentofPhysics,TsinghuaUniversity,Beijing1000841DepartmentofElectricalEngineering,TsinghuaUniversity,Beijing,100084(Received26April,2006;Revisedmanuscriptreceived10August,2006)Inthispaper,wepresentedanovelH2typeresonatorwhichhasanopengapinitsside.Theresonatorshowsitscharacterofthecompactsize,higherQ2factor,andweakernonadjacentcoupling.Theresonancefrequencycanbeeasychangedbychangingthepositionofthegapinalargescopetomeettherequirementindifferentfrequencybandneed,andeasytocarryoutforadjustingthespacebetweenmainresonatefrequencyandsecondharmonic.Thedirectconnectionmethodwasusedforthefeedline,itisconvenienttomatchtheexternalQfactorwithsufficientlyinput/outputofresonancefrequency.A122poleHTSband2passFilterwitha1.6%fractionalbandwidthat832MHzwasdesignedandfabricatedusingH2typeresonatorforCDMAmobilecommunicationsystem.Themeasurementshowedanexcellentperformanceat70Kandagreementswiththesimulationprediction.Thefilterexhibitslessthan0.28dBinsertionloss,15.5dBthereturnlossandahigherthan75dBout2of2bandrejection.Furthermore,theskirtslopesmorethan20dB/Mhzinthehighfrequencyendwasobtained.Keyword:HTSfilter,H2typeresonatorPACC:7470V,4280C,7870G42328