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1、INVITEDPAPERSmallAntennasinWirelessCommunicationsComplexitiesanddevelopmentsinsmallantennasforwirelesscommunicationsarediscussedinthispaperincludingcontext,physicalinsight,andperspective.ByHangWong,MemberIEEE,Kwai-ManLuk,FellowIEEE,ChiHouChan,FellowIEEE,QuanXue,FellowIEEE,KwokKanSo,MemberIEE
2、E,andHauWahLai,MemberIEEEABSTRACT
3、TheobjectiveofthispaperistoprovidetheInmostcases,theantennasarerequiredtobesmallinsizecontext,physicalinsight,andperspectiveonantennasinandwideinbandwidth,whicharecontradictingrequire-wirelesscommunications.Althoughitdoesnotmeantobements,asgovernedbythewell-
4、knownChu’slimit[1].Manycomprehensive,thefourkeytechnologiesrelatedtosmallmethodsforaccomplishingsmallantennasareavailableinantennadesignstobereviewedanddiscussed,includingtheliterature,suchasthetopicalmetamaterial-inspiredmultibandplanarinverted-Fantennas,broadbandfoldedpatchapproach[2]andth
5、erobustgeneticalgorithmoptimiza-antennas,compactdifferentiallyfedantennas,andminiaturetionapproach[3].However,foreaseofunderstandingofcircularlypolarizedpatchantennas,wouldcoverawiderangethediverseengineeringreadership,weattemptinthisoftopicalinterestsandpracticalapplications.Abriefoverviewp
6、apertosummarizethedevelopmentofsmallantennasofcomputersoftwareforanalyzingtheseantennasisalsoformodernwirelesscommunicationsunderfourdifferentprovided.Hopefully,thispaperwillbebeneficialforthegenericantennatechnologies,includingmultibandplanardiverseengineeringreadershipoftheIEEE.inverted-Fa
7、ntennas(PIFA),broadbandfoldedpatchan-tennas,compactdifferentiallyfedantennas,andminiatureKEYWORDS
8、Circularpolarization;differentialfeed;dipolecircularlypolarizedpatchantennas.Majormilestones,antenna;loopantenna;patchantenna;planarinverted-Fdesignchallenges,andphysicsoftheoperationoftheantenn
9、a(PIFA);smallantenna;widebandantennaantennaswillbediscussed.Althoughthecoveragedoesnotmeantobecomprehensive,wehopeitwillprovidethecontext,physicalinsight,andperspectiveforthereaders.I.INTRODUCTIONNumerouswirelesscommunicationssystemshavebeenII.MULT
