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试论多层结构滤波器优化及滤波器与天线集成设计
Abstract
Withtherapiddevelopmentofwirelesscommunicationandtheincreasingdemandofwirelesscommunicationequipment,therequirementsforfilterperformancearebecomingmoreandmorestrict.Traditionalsingle-stagefiltersnolongermeettheneedsofmoderncommunicationsystems.Therefore,multi-layerstructurefiltershavebecomeamajortrendinthefieldoffilterdesign.Multi-layerstructurefiltersoptimizethefilterperformance,improvethecommunicationquality,andenhancetheanti-interferenceability.Thispaperdiscussestheoptimizationofmulti-layerstructurefiltersandthedesignofintegratedfiltersandantennas.
Keywords:multi-layerstructurefilter,optimization,integrateddesign,wirelesscommunication
Introduction
Filtersarewidelyusedincommunicationsystemstoimprovesystemperformanceandreduceinterference.Filterscanfilteroutspecificfrequenciesandnoisetoimprovesignalqualityandreducenoiseinterference.Traditionalsingle-stagefilterscannotmeettherequirementsofmoderncommunicationsystems.Withtheimprovementofcommunicationtechnologyandtheincreasingdemandforhighercommunicationquality,multi-layerstructurefiltershavebecomethemainstreaminthefieldoffilterdesign.
Multi-layerstructurefiltersarecomposedofmultiplesingle-stagefilters.Eachsingle-stagefilterisconnectedinseriesorparallel,andthefilterparametersareoptimizedbyusingdifferentfilterdesignmethods.Multi-layerstructurefiltershavemanyadvantages,suchashighselectivity,lowinsertionloss,sharptransitionband,andhighout-of-bandrejection.Therefore,multi-layerstructurefiltershavebeenwidelyusedincommunicationsystems,suchasmobilephones,wirelessLAN,Bluetoothdevicesandothercommunicationfields.
Inadditiontotheoptimizationofmulti-layerstructurefilters,theintegrationoffiltersandantennashasalsobecomeapopulartopicinthecommunicationfield.Integratedfiltersandantennascannotonlysavespace,butalsoimprovethecommunicationefficiencyandreducetheinterferencebetweenfiltersandantennas.Inthispaper,wewilldiscusstheoptimizationofmulti-layerstructurefiltersandthedesignofintegratedfiltersandantennas.