移动通信中微带双工器的设计与仿真

5710071)DesignandSimulationoftheMicrostripDiplexerintheMobileCommunicationSystemZhangJiming,XiaoZhi,YanZehong(SchoolofElectronicEngineering,XidianUniversity,Xi′an710071,China)AbstractThispaperdescribestheprincipleofandmethodforthedesignofthediplexerinthemobilecommunicationsystem.Thediplexeradoptsthemicrostriphairpin-linestructure.Itiscomposedoftwonarrowbandpassfiltersconnectedwithsuitablematchingcircuits.Thedetaileddesignprocessofthetwofiltersisintroduced.Theresultsofsimulationandmeasurementareingoodagreement.KeywordsDiplexer;bandpassfilter(BPF);microstrip;hairpin-lineFDM2005-08-04T12TBPF12BPFBPFBPFλ/4BPFBPFλ/4BPF20061196ITAge/Jan.15,20066Diplexer-3portport1port2port3f1f2f1,f24λ4λMMIC2.651L1/2/4gLλ=10/geλλε=20λ121112(1)22rrehWεεε−+−=++32W/hZ0eεa(/1)Wh≤112111120.04122rreWWhhεεε−−⎧⎫⎡⎤+−⎪⎪⎛⎞⎛⎞=+++−⎢⎥⎨⎬⎜⎟⎜⎟⎝⎠⎝⎠⎢⎥⎪⎪⎣⎦⎩⎭41060ln80.25eWWZhhε−⎡⎤⎛⎞=+⎢⎥⎜⎟⎝⎠⎢⎥⎣⎦5(/1)Wh111111222rreWhεεε−−⎡⎤+−⎛⎞=++⎢⎥⎜⎟⎝⎠⎢⎥⎣⎦610120π1.3930.667ln1.444rWWZhhε−⎡⎤⎛⎞=+++⎜⎟⎢⎥⎝⎠⎣⎦7b120110.110.236021rrrrZAεεεε⎛⎞⎛⎞+−⎛⎞=++⎜⎟⎜⎟⎜⎟+⎝⎠⎝⎠⎝⎠82060πrBZε=91.52A()()3expexp22AWhA=−101.52A≤()()120.611ln21ln10.39π2rrrWBhεββεε⎧⎫⎡⎤−⎪⎪=−−−+−+−⎨⎬⎢⎥⎪⎪⎣⎦⎩⎭113ssk3full-wavesimulation2.651mm1.86mm60mm1.4mm,11FBWiiiikgg++=i=123...n-112niFBWigis4/20061157k0.020.030.040.050.060.070.080.090.0100.511.522.5s/mm01FBWggk=134k1520253035404550100.10.20.30.40.50.6s/mm5ll∆l∆l∆(0.3)(0.264)0.412(0.258)(0.8)eeWhlWhεε++∆=−+14Wheε3ansoftdesignercircuitEM855MHz-895MHz935MHz-970MHz2.651mm0.00050.1dBn=3g0=g4=1g1=g3=1.0315g2=1.14740.1mm,65ΩW/h12321831%3412855-895MHzWPS1S2S31.85759.10.181.41.27(935-970MHz)WPS1S2S31.85754.70.21.41.37ITAge/Jan.15,20068AnsoftDesigner34mm855-895MHzWPS1S2S31.85758.090.151.381.09(935-970MHz)WPS1S2S31.85753.310.171.381.21EM51.1dB7SMA61.6dB1.7dBSMA121..:,1976.2,..:,1973.3MorikazuSasawa,KenichiTakahashi,MitsuoMakimotoMiniaturizedhaiepinresonatorfiltersandtheirapplicationtoreceiverfront-endMIC’S.IEEETransMicrowaveTheoryTech.1989,MTT-37(12),19911996.4CristalEG,FrankelS.Hairpin-lineandhairpin-line/half-waveparallel-coupled-linefiltersIEEE.TransMTT,1972,20(11):719728.5PramanickP.Compacts900-MHzHsirpin-LineFiltersUsingHighDielectricConstantMicrostripline.InternationalJournalofMMWCAE,1994,4(3):272281.6HongJia-sheng,LancasterMJ.MicrostripfiltersforRF/microwaveapplications.Newyork:JohnWilrk&Sons.Inc,2001.29161.18JuI2006AnsoftCorporation03:56:30XYPlot1PlanarEM10.0020.0040.0060.00Y10.700.800.901.001.10[F]GHzY1dB(Port1,PorSetup1:Swee)Y1dB(Port2,PorSetup1:Swee)Y1dB(Port3,PorSetup1:Swee)