资源描述:
《通信专业毕业设计外文翻译1》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、ANovelMethodforDesigningDual-FrequencySlotPatchAntennaswithTwoPolarizationsWUDi1,OHISHIBASHIHidekazu2,SEOKazuyuki2,INAGAKINaoki3(1.DepartmentofCommunicationEngineering,ShanghaiUniversity,Shanghai,China;2.KojimaR&DCenter,KojimaPressIndustrialCoLtd,Aichi470—0207,Japan;3.NagoyaInstituteofTechnology,
2、Nagoya466—8555,Japan)Abstract:Thispaperpresentsanewmethodfordesigningadual-frequencypatchantennawithcircularandlinearpolarizations.Dual-frequencyoperationsarebehavedbyetchingtwonarrowslotsclosetotheradiatingedgesofarectangularpatch.Thecircularpolarizationatthelowerresonantfrequencyofthedual-frequ
3、encyantennacanbeachievedbysettingaperturbationsegmentatanappropriatelocationinthepatchelement,andplacingthefeedpointonthediagonalaxis.Severalexperimentalresultsofadesignedantennashowthegoodcharacteristicsforcircularandlinearpolarizationsatbothresonantfrequencies.CLCnumber:TN821.1Documentcode:AKey
4、words:dual-frequency;slotpatchantennas;linearpolarization;circularpolarizationInradarandcommunicationsystems,dual-frequencyoperationsareoftenrequired.Specially,inmodernmobileglobalpositionsystem(GPS),itwillbedesirablethatoneoftwofrequenciesisthecircularpolarization.Planarantennahasbeeninvestigate
5、dformulti-frequencyverywellsinceitisadvantageousinlowcost,lowweightandconformability.Earlydual-frequencyplanarantennaismultilayeredstacked-patchstructure,andtheradiatingelementisusedtobecircular[1],annular[2],rectangular[3]andtriangularpatches[4].Recently,adual-frequencyantennaisintroducedinwhich
6、thestructureisdinglelayerpatchwithtwoslotsclosetotheradiatingedges,andgoodperformancesofsimultaneousimpedancematchingandgainaredemonstratedforbothresonantfrequencies.However,alltheconventionalinvestigationsareonlyforthecaseinwhichtheantennapolarizationislinear,whilethedual-frequencyantennawithcir
7、cularpolarizationhasnotbeentouchedyet.Inthispaper,wepresentadesignmethodofadual-frequencyantennawithcircularandlinearpolarizationsbasedontheconventionalinvestigationforthedual-frequencylinearpolarizationantenna[5~7],Tw