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1、II多頻帶印刷天線設(shè)計及縫隙天線波束偏轉(zhuǎn)研究萬方數(shù)據(jù)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萬方數(shù)據(jù)IV多頻帶印刷天線設(shè)計及縫隙天線波束偏轉(zhuǎn)研究萬方數(shù)據(jù)目錄V目錄摘要..................
