微带3dB定向耦合器的分析与设计

200712103dB7100713dBT3dBHFSSTAnalysisandDesignOfMicrostrip3dBDirectionalCouplerWengLihong,ShiXiaowei,GuoYuchunNationLaboratoryofAntennasandMicrowaveTechnology,XidianUniversity,Xi’an710071,ChinaAbstract:Thispaperdiscussesaconvenientmethodfordesigning3dBdirectionalcouplers.Moreaccurateevaluatedmethodispresentedforthenon-symmetricT-junctionofthedirectionalcoupler.Thelimitationofthegeneralizedmodifiedexpressionsofevaluatingthelengthsandwidthsofmicrostripisalsopresented.Thecouplers’networkissimulatedbyAnsoftHFSS.Asanexample,thecomparisonresultsbetweenthesimulationandthefactcouplershowthatadoptingthenewexpressionofthepaperimprovestheexcursionofthefrequencyarosebythegeneralizedmodifiedexpressions.Thenewmethodisusefulofdesigningmoreaccurateparametersofthedirectionalcoupler.KeyWords:Microstripline,Directionalcoupler,T-Junction,Isolation,Couplingfactor1TWheeler[1]121976Owens[2]Gupta1979[3-4]T[5]TSilvesterBenedek[6]TE.Hammerstad1981T[7]TT[8][9]3dB1211TT3dBAnsoftHFSS,2A.3dB10/4l0l13423412342/0Z2/0Z0Z0Z0Z0Z0Z0Z`2/0Z2/0Z0Z0Z0Z0Z0Z0Z1234(a)T(b)T13dB3dB()1/23dB(T)(C)(D)(I)T[10]3dBT23dBT[10]T3dB1l2l1gl2gl1w2w()()112221/40.2~0.4/40.6~0.8gglwlwllì=+ïïïíï=+ïïî(1)1:njBT3T1T2Y01Y02Z01T3D2w2w1D12d1T1T2d2Z02(a)an:11:bnTjBbT12TaT1bT1aT12TbZ01aZ0102Zad1bd1w1w2w3(b)2TT000.31202Zcfhp(h)[8]TT3dBT3dBB.1w2w3w2wrehOwens[2]()()()[]()10014428421ln2110.2930.517ln1442HrHrrrrrweZhewddhdZeeeepeeepee-=-³-=---+---+-ìïïïïïïïïíïïïéùïïêúïïêúïîëû(2)()()0141lnln2(1)2119.921rrrrZHpeeepeæö÷ç÷-+ç÷ç÷ç+èø=++2059.95rdZepe=2b1l2l1111222/422/22gabgmlddldllqpìï=++ïïíï=+ïïî(3)200712120fpf21D2DT1aT1bT11abdd+2T2deffeanbnTB01112220[]0.4/[]120/120//peffeffgefffGHzZhmmDhZDhZpepelleì=ïïïïï=ïïíï=ïïïï=ïïî(4)()()()()21.5000.555029.9821141lnln121*44221111044222reffrrrrrreffrZZhZwepeeepeeeeee--=++++³-+-=++-ììüæöïïïïï÷ïç÷ïçíý÷ïç÷çïïèøïïïîþïïïïíïïïïïïïïïî(5)T2222012121110.512pfZdnfZDpéùæöæöæö÷ç÷÷êúçç÷÷÷ç=-+-çç÷÷÷êúççç÷÷÷çç÷çèøèøèøêúëû(6)TB:()2111212222101221205.5210.9ln4.51.34.4exp20grTrpBndZYDDZZfZZZfZleeh-é+ê=++êëùæöæöæö-÷úç÷÷çç÷÷÷ç--çç÷ú÷÷ççç÷÷÷çç÷çèøèøúèøû(7)2Z'2Zmq()2'2222121cos()mnZZBZBZq-ìïï=ïïï-íïïï=ïïî(8)1T2T21101''22122210'121111'''2220.055120.50.050.251.60.7exp0.17lnppdZfZDZfZdZfDZfZZZZZZìéùïæöï÷êúçï÷ç=-ï÷êúç÷ï÷çêúèøïïëûïïïìïæöïï÷çïï÷ç=-++íí÷ç÷ïï÷çèøïïïîïïïüïæöï-ï÷ïç÷ï-çý÷ïç÷çïïèøïþïïî(9)T1aZ1bZ1ad1bd2d(4)32110ZZZhfcbarebapeffeffDDfww1112121eeTbbTaaBnBnmZq'2badd112l1l3C.3dB3.6GHz4.3re=h=1.5mmRF414.94wmm=111.08lmm=22.89wmm=216.32lmm=453dB4HFSS5363dB2GHz6GHz12133.6GHz26.84dB4.18dB4.17dB4GHz0900901dB3dB1234567010203040506070800102030405060(a)23456-10-50510152025300510152025303540(b)2345603060901201501800306090120150180(c)673dB0fVSWR1.543dB0907[1]H.A.Wheeler,“Transmission-LinePropertiesofParallelStripsSeparatedbyaDielectricSheet,”IEEETrans.,vol.MTT-13,pp.172-185,March(1965).[2]R.P.Owens,“AccurateAnalyticalDeterminationofQuasi-StaticMicrostripLineParameters,TheRadioandElectronicEngineer,”46.NO.7,pp.360-364,July(1976).[3]K.C.Gupta,“MicrostripLinesandSlotlines,Dedbam,Mass,”ArtechHouse,1979.[4]L.N.Dworsky,“ModernTransmissionLineTheoryandApplication,”John-Wiley&Sons.Inc.,1979.[5]K.C.Gupta,“Computer-AidedDesignofMicrowaveCircuits,”Artech,1981.[6]P.SilvesterandBenddek,,“MicrostripDiscontinuityCapacitancesforRight-angleBends,T-JunctionandCrossing,”IEEETrans.,vol.MTT-21,NO.5pp.341-346,May(1973).[7]E.Hammerstad,“Computer-AidedDesignofMicrostripCouplersWithAccurateDiscontinuityModels,”IEEETrans,pp.54-56,1981.[8],,,1985,pp.164-167.[9],,,,1978,pp.295-298[10],,,,,1978,pp.189-196微带3dB定向耦合器的分析与设计作者：翁丽鸿，史小卫，郭玉春作者单位：西安电子科技大学天线与微波技术国家重点实验室,西安,710071本文读者也读过(10条)1.张婷.傅德民.田立卿一种高方向性宽频带定向耦合器的研究[会议论文]-20062.韩磊.黄庆安.廖小平.HANLei.HUANGQing-an.LIAOXiao-pingX波段微带线定向耦合器的设计与模拟[期刊论文]-电子器件2006,29(2)3.张婷.傅德民.田立卿一种高方向性宽频带定向耦合器的研究[会议论文]-20054.陈蕾.尚宇.魏峰.CHENLei.SHANGYu.WEIFeng一种新的缺陷地微带线定向耦合器[期刊论文]-西安工业大学学报2008,28(4)5.廖敏选择定向耦合器设计方法的简单准则[会议论文]-19996.纪生宝.张绍洲.JISheng-bao.ZHANGShao-zhou微波3Db微带双分支定向耦合器的小型化[期刊论文]-无线电工程2008,38(4)7.高强.袁乃昌宽带定向耦合器的设计[会议论文]-20028.马胜泉.张绍洲.MaShengquan.ZhangShaozhou一种结构新颖的小型化微带分支线定向耦合器[期刊论文]-电子技术2010,37(2)9.师鹏燕.王敏锡.赵明洪.SHIPeng-yan.WANGMin-xi.ZHAOMing-hong平行耦合线定向耦合器的设计[期刊论文]-信息技术2009(6)10.冯西尧.肖高标.毛军发.FENGXi-yao.XIAOGao-biao.MAOJun-fa非均匀传输线的宽带3分贝耦合器设计[期刊论文]-应用科学学报2006,24(5)本文链接：