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1、AbstractAbstractBythedevelopmentofscienceandtechnologyandthemodernizationofsociety,itisrequiredahigherupdaterequirementsforcommunicationsequipment.Theantenna,asanimportantpartinit,isalsofacedwiththetouchrequirementsofhighefficiency,miniaturizationhigh-gainandsoon.Thispaperisaboutshor
2、tbackfireantenna.Ithastheexcellentcharacteristicsofhighgain,highefficiency,compactstructureandcostperformance.Firstly,itisdescribedthebasicknowledgeofshortbackfireantenna.Introducingtypicalshortbackfireantennaandsummingitsdifferentimprovedstructure.Secondly,researchanddesignsuperiorp
3、erformancethelinearpolarized,dual-polarizedandcircularlypolarizedshortbackfireantenna.Thesisdesignincludesthreetypesofshortbackfireantenna.First,itisdesignedtwokindsoflinearlypolarizedshortbackfireantennas,waveguideexcitationandH-shapedslotexcitationstructure.DesigningaSBAofsimplestr
4、ucturewithwaveguideexcitation,andthenexploringtheroleofthedifferentpartsoftheantennaperformance,lastdesigninganewtypeofhighgain,broadbandwaveguidelinearlypolarizedshortbackfireantenna.DevisingshortbackfireantennaofH-shapedslotpatchtomeettherequirementsofwiderbandwidthandlowsidelobes.
5、Second,designingtwodifferentcharacteristicsoforthomodetransducer,simplestructureandhighisolation,andthencombiningthemwithwaveguideshortbackfireantennatoachievetwokindsofdual-polarizedshortbackfireantennawithgoodperformance.Thedesignresultsprovethattheyaretomeetthetargetrequirements.F
6、inally,itisdesignedthatcircularlypolarizedshortbackfireantennaofdoubleH-shapedslotpatch,methodfromtheshortbackfireantennaofH-shapedslotpatchlinearlypolarized.Keyword:shortbackfireantennawaveguideexcitationH-shapedslotexcitationOrtho-ModeTransducer(OMT)目录目录摘要..........................
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