基于混合左右手传输线的滤波器分析

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1、AbstractABSTRACTRecently,compositeright/lefthandedtransmissionline(CRLHTL)hasdrawnattentionofresearchersinandabroadsinceitsuniqueelectromagneticproperties.Itslefthandpropertiesfindgreatimportanceinpassivecomponentsminiaturization.BasedontheinterdigitalCRLHTLunitcellstructure,somebasice

2、lectromagneticpropertiessuchasmixedcoupling,resonancemodewillbeanalyzed.Theunitcellisthenappliedinvariousfilterdesignsasanoveltypeofresonator.Theoriginalworkandvaluableresultsofthedissertationisasfollows:1.TheCRLHTLdispersioncurveisanalyzedandkeyparametersthatdecidethedispersionrelatio

3、nshiparefound.Then,negativeorderresonancemodeandzerothorderresonancemodeoftheunitcellareanalyzed.Besides,themethodofparameterextractionfortheinterdigitalCRLHTLunitisgiven.2.BasedontheCRLHresonator,asecondorderwidestopbandbandpassfilterwithchebysheveresponseisdesigned,andbyutilizingcros

4、scouplingandmixedcouplingtechniques,bandskirtofthefilterisimprovedwhileotheradvantagesinsizeandstopbandperformanceoftheoriginalfilterremain.3.Basedontwoofthemostcommonlyusedmethodsfordual-bandpassfilterdesign,twonovelCRLHdual-bandpassfiltersaregiven.Thefirstoneisinaparalleltopologyandt

5、hesecondoneisbasedonaCRLHdual-moderesonator.Thisnovelresonatorhastworesonancemodeswithonlyoneunitcell.4.SomebandstopfiltersaredesignedbasedontheCRLHresonator.Miniaturizationisrealizedbymakinguseofitsnovelresonancemodes.Theproposeddual-bandstopfilterhasadvantagesbothinsizeandfilteringpe

6、rformancecomparedwithsometypicaldual-bandstopdesigns.Intheend,anovelbroadbandbandstopfilterisrealizedbasedonsignalinterferencetechniquewitha-90degreeCRLHtransmissionline.Keywords:CRLHTL,filter,miniaturization,crosscoupling,mixedcouplingII万方数据目录目录第一章绪论...................................

7、.......................................................................11.1研究背景及意义.......................................................................................11.2国内外发展动态.......................................................................................21.2.1混合左右手传输线单元的