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1、ABSTRACTIIIABSTRACTWiththerapiddevelopmentofmoderncommunication,thetechnologyofmulti-beamantennaarraysiswidelyusedinmanyareas.Asananalogbeam-formingmethod,Butlermatrixcanbeusedtoacceptorlaunchorthogonalmulti-beams,whichisofgreatvalueinthedesignofmulti-beamantennaarrays.Inrecenty
2、ears,theresearchofButlermatrixhasmainlyfocusedonhowtorealizeminiaturization,broadbandandlowtransmissionloss.Atthesametime,thedevelopmentofcommunicationtechnologyraiseshigherdemandsforantennadesign.Withtheoutstandingadvantagesofsmallsize,easeofintegrationandlowcost,theprintedplan
3、arantennahasplayedasignificantroleinantennastudyanddesign.Theauthor’smajorcontributionsaresummarizedasfollowing:1.Fourdifferenttypesof3dBdirectionalcouplersareproposedinthispaper,whichincludeanarrowbandtwo-branchlinecouplerworkingatthefrequencyof2GHzandthreewidebandcouplersworki
4、ngat2.3GHz.Theyarerespectivelythethree-branchlinecoupler,theLangecouplerandtheslot-coupledcoupler.ThedifferentcouplersofferavarietyofchoicetoconstructaButlermatrix.2.Twokindsofnarrowband4×4Butlermatrixesaredesigned,whichbothadoptthetwo-branchlinedirectionalcouplersas3dBcouplers.
5、Andtwootherkindsofbroadband4×4Butlermatrixwithcenterfrequencyof2.3GHzareproposed,ofwhichthefirstoneiscomposedof3dBLangecouplerandbroadbandcrossoverandthesecondiscomposedofslot-coupled3dBcouplersondouble-layersubstrateandT-Shapewidebandphaseshifters.ComparingwiththenarrowbandButl
6、ermatrixes,thebroadbandButlermatrixeshaverealizedminiaturizationandlowloss,thusachievingagoodperformanceofdesign.3.Oneplanarprintedrelayantennaswithdifferentapplicationsisproposedinthethesis.Thefirstoneisadirectionalradiationantennacomposedbypowerdivider,phaseshifterandprinteddi
7、pole,whichcanbeusedinthepositioningandnavigationsystem.Thesecondoneiscomposedof90°hybridandprinteddipole,whichcanbeusedinrelaystationsystem.Theplanarprintedrelayantennahasadvantagesofsimplestructureandeaseofrealization.Keyword:Butlermatrix3dBdirectionalcouplerphaseshiftercrossov
8、erprintedplanarantenna目录V目录第一章绪论...............
