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1、上海交通大学工程硕士学位论文AbstractResearchandDesignofTDMobileTerminalAntennaAbstractThequalityofthemobileterminalsignalmostlydependsontheperformanceofantennadesign.TheterminalisakeytothedevelopmentofTDindustrychain,whilethedevelopmentofterminalistosomeextentrestrictedbytheantenna.Soresearchersshouldfocusonho
2、wtoexpandthebandwidthoftheantennawithoutincreasingtheantennaareainthelimitedspace.Inthisthesis,accordtothegeneralrequirementsofTDmobilephone.UsingthesofttoolofSEMCADtosimulateantennaandthroughthecouplingtechnology,andthroughthecouplingtechnology,extensionofthecurrentpath,impedancematchingtechnolo
3、gy,atlastsuccessfullydesignanantennaofTD6bands.Theheightoftheantennais4.8mmandtheareais520mm2.TheantennaoperatefrequencybandforEGSM900/GSM1800/B34/B38/B39/B40andpassiveefficiencyismorethan30%,VSWR<3.TheOTA(overtheair)oftheantennatestmeetthespecificationrequirements.BasedonthetraditionalPIFAantenn
4、a,thethesisdesigntheantennabydeletingthegroundofPCBwhichundertheantenna.Inaddition,weaddaparasiticelementnearthepositionofantennasfeedingspotinordertogethighfrequencyband.ComparedwiththetraditionalPIFAantenna,theareaoftheantennareduced20%.Inthethesis,weuseanewmethodtoimprovetheTPRbytunetheloadpul
5、lofPA.Theadvantageisthatnotchangetheantennapatternandantennamatchingandimprovingthedesignefficiency.Inaddition,thethesispresentsanewtunableantennatechnology.TocontroltheantennabombfeetgroundbyRFswitch,canobtainfourkindsofantennapattern(IFAantenna、monopoleantenna、IFAantennawithcoupling、monopoleant
6、ennawithcoupling).Eachantennapatternwillgetdifferentband.Atlast,theantennaneededonly450mm2.Itspassiveefficiencyinmorethan35%andVSWRislessthan3.Thistunableantennacanbedesignedmuchmorebands.Forthefutureofmobileterminalantennadesign,thisantennahasaverygoodprospect.Intheend,thethesisintroducessomerel
7、atedknowledgeaboutLTEdiversity.Thediversityantennaareaisonlymm2,successfullydesigntheantenna.TheantennaworksinB38/39/40band,andpassiveefficiencyismorethan30%andtheTISmeetscriterion.EMIinterferenceaffectsreceiveindex,th
