非均勻微帶線分布電路參數(shù)及小型化微帶帶通濾波器研究.pdf

1、北京交通大學碩士學位論文非均勻微帶線分布電路參數(shù)及小型化微帶帶通濾波器研究姓名：梁唯一申請學位級別：碩士專業(yè)：電磁場與微波技術指導教師：王均宏20061201IE哀交通盤堂亟堂位論塞△曼S!B△￡!ABSTRACTMicrowavecircuitsarewidelyusedinradaravigationandspaceflightareasNowthedevelopmentofthemodemcommunicationsystems，

2、especiallyforthesatellitecommunicationandmobiletelecommunication，callnotbeseparatedawayfrommicrowavecircuitHowevercomparingtothecircuitsworkingatlowfrequencyandindigitalstate，microwavecircuitsworkingathighfrequencyandhav

3、emanyspecialtiesinmaterials，configures，circuitstructure，elementsanddesignmethods，SOitisnecessarytostudymicrowavecircuitdeeplyThisisthemainreasonofthisthesistoselectnon—uniformmicrostriplineandbandpassmierostripfiltersast

4、heresearchsubjectsThemainworksandtheinnovativepartsofthisthesisaresummarizedasfollowing：1TheGeneralizedTransmissionLineEquationsareemployedtoanalyzethecircuitparametersofthenonuniformmicrostriplinesThestaticdistributedca

5、pacitancesandinductancesofthe90。bentmicrostriplinesareextracted2Bycomparingthedifferencesbetweentheport’SSparametersrespectivelyobtainedbytheextractedstaticcircuitparametersusingcircuitmethodandbytheMethodofMomemdirectly

6、，theapplicablefrequencyrangeoftheextractedstaticdistributedcircuitparametersisfoundTheresultsshowthattheextractedstaticcircuitparameterscanbeusedinacertainfrequencyband3Theproblemofthemomentmethodwhenusedinanalysisofstru

7、ctureswithsmallreflectioniSstudiedWiththemethodofminustwesultsrespectivelyobtainedfromthebentmicrostripandthestraightmicrostripwiththesamelength，thesmallmismatchduetotheterminationloadsemployedinmomentmethodcanbeeliminat

8、edTheresultsbythismethodareinagreementwiththoseobtainedbyanalyticalmethod4Couplingcombunitandseparatedelectricalandmagneticcouplingpathsunitarechosentoconstructourinnovativefilters’resonatorunitsComparingwiththetradition

9、alcombfilterthisnewfilterhassmallersize5Byusingthetechniqueofslottingonthemiddlemetalplate，thehorizontalcouplingononelayerischangedintoverticalcouplingbetweentwolayersThisresultinaminiaturizedfilterwitllsatisfyingperform