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1、ABSTRACTABSTRACTThedirectionalcouplerisadirectionalpassivemicrowavedevice,oftenwidelyusedinmicrowaveandmillimeter-wavedomain,forexample,thepowermonitoringsystem,themeasurementsystem,thedistributionandsynthesisofpowersystem.Inrecentyears,withthechangeoftheprocessingofthecoupler,thedirectionalcouplerg
2、raduallybecomeanindispensableelementinthecommunicationsystem.Inpassivecircuit,thedirectionalcouplerismostlyusedinfiltersandmatchingnetwork.Inactivecircuit,itismainlyusedinthephaseshifters,mixers,balancedamplifiers,attenuators,etc.Therearemanytypesofdirectionalcouplerandtheyhavegreatdifferenceonthest
3、ructureandprinciple.Inrecentyears,microstripandstriplinedirectionalcouplerhasdevelopedrapidlyandwidely,becauseofitssmallsize,goodperformanceandeasyprocessing,butsuchcouplersarecommonlyexposedtolowpower.Thewaveguidecouplerhashighpowercapabilityandwideoperatingbandwidth,whichoftenusedinhigh-powersyste
4、m.Inthispaper,wemainlyresearchthedirectionalwaveguidecoupler,includingsingle-holedirectionalcouplerandmulti-holedirectionalcoupler.Thedirectionalwaveguidecouplerwedesignedhasgoodperformance,andbytesting,itisprovedtohavemoreadvantagesandpracticalapplicability.Inthispaper,bystudyingtheholecouplingtheo
5、ry,welearnabouttheworkingprincipleofsingle-holeandmulti-holedirectionalcoupler.Basedonthetraditionaltheoryofwaveguidedirectionalcoupler,wemakeastep-bycomparisonofthestructureparametersofsingle-holewaveguidedirectionalcoupler,andmakeaconclusionabouttherelationshipbetweenthecouplingperformancewiththec
6、hangeofstructureparameters.Afterthis,wepromotedanewwaveguidedirectionalcouplerinnovativelyandimproveitscouplingform.Weraisetriangularandrectangularcouplingstructure.Bythesimulationandoptimizationonsoftware,wedesignedacompactwaveguidedirectionalcouplerwhichhaswideworkingfrequencybandaswellasbetterdir
7、ectionalityandhasbeenappliedforpatent.Thelatertestverifieditsadvantagesandpracticality.II万方数据ABSTRACTThroughthiswork,aninnovatedesignofwaveguidedirectionalcouplerispresented,whichprovidesanewideaormet
