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1、ABSTRACTABSTRACTInrecentyears,moreandmoreapplicationsofmicrostripantennaarrayaredeveloped.Thegoalofthisthesisistoimprovetheperformanceofantennaarrayswithnovelmetamaterialconceptsandproposenewideasonmetamaterialapplications.Theresearchmethodsinthisthes
2、isissummarizingtheresearchesofpredecessorsandthendesigningmetamaterialantennaarraysbasingonthem.Theresearchesofpredecessorswesummarizedincludeanalysisanddesignofcompositeright/lefthandedtransmissionline,therealizationofthistheoryusinginductance-capaci
3、tancecircuitsmodelandextractionofparametersinthistransmissionlinestructure.Theyalsoincludetwotypesofseries-fedmetamaterialantennaarray,aplanarmetamaterialantennaarray,basingontheresearchofpredecessors.Toapplymetamaterialconceptstomicrostripantennaarra
4、ys,wesummarizedtheoryandexamplesoftraditionalmicrostripantennaarrays.Weanalyzedanddesignedtheretypesofmetamaterialantennaarrays.Basedonthesummarization,wedesignednovelmetamaterialarrays,includingtwotypesofseries-fedmetamaterialantennaarraysandametamat
5、erialplanararray.Comparingtotraditionalmicrostripantennaarrays,metamaterialantennaarrayshavesignificantlybroadenedthebandwidthandimprovedtheradiationpattern.Metamaterialantennaarraysalsoderivesomeoftheadvantagesofitselements,likehighefficiencyandlowlo
6、ss.Theradiationdirectionoftheseantennasandarraysareonthefront,whichisthesamedirectionofmicrowavepropagatinginthefeedingline.Theantennasandarraysallhavelinearpolarization.Thesearrayshavebeendesigned,simulated,fabricatedandmeasured.Thesimulatedresultsan
7、dmeasuredresultsagreedwell.Thenwediscussedoff-centeredfeedinglineweresignificanttometamaterialarraydesignandgaveanillustration.Thenwecandrawaconclusionthatapplyingmetamaterialconceptstoarraydesigncanimproveperformancesofantennas,especiallyonbroadening
8、bandwidth,increasinggainsandincreasingefficiency,andcanchangeradiatingdirectiontothefrontdirection.Wegavenewideasonmetamaterialapplicationonantennaarrays,andsomenewdesigns.Thesemetamaterialarraysaresignificanttoresearchbothonantennaandmetamate
