多频带印刷天线设计与缝隙天线波束偏转分析

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1、II多频带印刷天线设计及缝隙天线波束偏转研究万方数据AbstractIIIAbstractWiththerapiddevelopmentofwirelesscommunicationsystem,modernradar,electronicwarfareandinformationtechnologyindustryhavemadegreatprogress,andtheelectronicinstrumentsrenovatesuccessively.Inthissituation,asanesse

2、ntialcomponentofthewirelesscommunicationsystem,theperformanceofantennasisdirectlyrelatedtothequalityofthewholesystem.Hence,itfacesuptomanyhigherdemandsformultiplefrequencies,miniaturizationandultra-widebands.Theplanarprintedantennashavebecomeahotspotofd

3、esignandstudy,duetotheirlowerprofile,easierfabricationandlowercostcharacteristics.Slotantennaswillapplytomorecommunicationsystemswhilethereismorestudyontheirbeamslant.Thispapermainlyfocusesonthedesignofmultibandprintedantennasandthebeamslantofslotantenn

4、as.Themainachievementsofthispaperareoutlinedasfollows:1.G-shapedandS-shapedmultibandprintedantennasarestudy;bothofthemconsistofmeanderstripstructures.Thesurfacecurrentdistributionsofthetwoproposedmultibandantennasateachresonantfrequencyaregiven.Thelengt

5、hsofthemeanderstripsareregardedasprimaryparameters,whichareanalyzedtoinvestigatetheirinfluenceontheband.Theprototypesoftheproposedantennasarefabricatedaccordingtoasetofoptimizedparameters.Fromthemeasuredresultswecanconcludethatbothofthemultibandmonopole

6、antennashavegoodradiationcharacteristics.2.AmultibandopenslotantennawhichsatisfiedtotheWLANandWiMAXapplicationsisdesigned.ThemultibandcharacteristicisexpendedbytheunsymmetricalradiationpatchandtheL-shapedslotonthegroundplane.Theantennaisfabricatedandtes

7、ted.Themeasuredresultsagreewellwiththesimulatedones,whichshowtheproposedantennahasgoodperformance.3.Inthispart,thestudyofbeamslantofacertainsortofslotantennaisdemonstrated.Thesimulatedresultsshowthatitcansuccessfullychangethemainbeamdirectionbycuttingsl

8、otsandaddingdirectors.Thetestingresultsoftheprototypeantennaprovethatthemainlobeturn90degrees,verticaltothetraditionalone.Keywords:MultibandprintedantennaSlotantennaBeamslant万方数据IV多频带印刷天线设计及缝隙天线波束偏转研究万方数据目录V目录摘要..................