5g微带阵列天线讲解.docx
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5g微带阵列天线讲解
5G微带阵列天线
要求:
利用介质常数为2.2,厚度为1mm损耗角为0.0009的介质,设计一个工作在5G的4X4的天线阵列。
评分标准:
良:
带宽〈7%
优:
带宽〉7%且效率大于60%
1微带辐射贴片尺寸估算
设计微带天线的第对于工作频率即为:
步是选择合适的介质基板,假设介质的介电常数为&r,
f的矩形微带天线,可以用下式设计出高效率辐射贴片的宽度W,
式中,C
波长,即为:
是光速,辐射贴片的长度一般取为飞/2;这里e是介质内的导波
考虑到边缘缩短效应后,实际上的辐射单元长度L应为:
L—C-2丄
2f•.;e
式中,
计算,即为:
;e是有效介电常数,厶L是等效辐射缝隙长度。
它们可以分别用下式
1
Er+1Er—1h-5
;e(112)2
22w
.丄"412h(;e。
①⑶川°264)
®—0.258)(w/h+0.8)
2.单元的仿真
由所给要求以及上述公式计算得辐射贴片的长度L=19.15mm,W=23.72mm采
用非辐射边馈电方式,模型如图1所示:
图1单元模型
此种馈电方式,可以通过移动馈电的位置获得阻抗匹配,设馈电点距离上宽
边的偏移量为dx,经仿真得到当dx=4mmP寸,阻抗匹配最好。
另外,之前计算出的尺寸得到的谐振点略有偏移,经过仿真优化后贴片尺寸变为L=19mm,W=23.72mm仿真结果图如图2,图3所示。
Freq[GHz]
图2S11参数
图3增益图
从图中可以看出谐振点为5GHz计算的相对带宽为2.2%,增益为5.78dB
2.2X2阵列设计
设计馈电网络并组阵,模型图如图4所示。
图42X2微带天线阵列
图5S11参数
由S11参数可以看到2X2阵列天线谐振点为5GHz且此时的S11=-19dB,说明反射损耗小,匹配良好。
相对带宽约为2.8%。
CurveInfo
.dB(GainTotal)Setup1:
LastAdaptiveFreq='5GHz'Phi='0deg'dB(GainTotal)Setup1:
LastAdaptiveFreq='5GHz'Phi='90deg'
图6方向图
由方向图可以看出2X2阵列天线的增益为13.96dB,第一副瓣电平为-10.6dB,可知组阵能使天线的增益变高。
3.4X4阵列天线
天线阵列如图7所示:
图74X4阵列天线
m25.0560-10.4730
dB(S(1,1))Setupl:
Sweepdy='12mm'
600
图8S11参数
目d—nraCGOd
RadiationPattern1
HFSSDesign1
CurveInfo
dB(GainTotal)
Setup1:
LastAdaptive
dx仁'60mm'Freq='5GHz'Phi='0deg'
dB(GainTotal)
Setup1:
LastAdaptive
dx仁'60mm'Freq='5GHz'Phi='90deg'
图9方向图
由S11参数图可以看到谐振点在5GHz反射损耗较小,带宽约为2%由方向图可以看到增益约为19.96dB,第一副瓣电平为-11.79dB。
参考文献
[1]ITUGlobalStandardforInternationalMobile
Telecommunications[S].IMT-Advanced,Circularletter,ITU-RMarch2008.
[2]N.Takehiro,N.Satoshi,B.AnassBenjebbour,etal.,Trendsin
SmallCellEnhancementsinLTEAdvanced[J].IEEECommunicationsMagazine.Feb.2013,vo1.51,no.2,98-105.
[3]O.Aliu,A.Imran,M.Imran,etal.,Asurveyofselforganizationinfuturecellularnetworks[J].IEEECommunications,2011,
vo1.9,no.11,1-26
[4]T.L.Marzetta,Noncooperativecellularwirelesswithunlimited
numbersofbasestationantennas[J].IEEETrans,WirelessCommunications,Nov.2010,vo1.9,no.ll,3590-3600,.
[5]J.Zhang,C.K.Wen,S.Jin,etal.,Oncapacityoflarge-scaleMIlVIOmultipleaccesschannelswithdistributedsetsofcorrelated
antennas[J].AreasCommun,Feb.2013,01.31,no.2,133一148.
[6]H.Huh,GCaire,H.C.Papadopoulos,etal.,AchievingMassiveMIMOspectralei}iciencywithanot-so-largenumberofantennas[J].
IEEETrans.WirelessCommunications,Sept.2012,vol.ll,no.9,3226-3239.
[7]J.HoydisandM.Debbah,Greencost-ei}ective,flexible,smallcellnetworks[C].IEEEComSocMMTCE-LetterSpecialIssueon"MultimediaoverFemtoCells",Sep.2010,vo1.5,no.5.1-3
[8]X.Gao,F.Tufvesson,O.Edfors,etal.,Measuredpropagationcharacteristicsforvery-largeMIMOat2.6GHz[C].inProc.ofthe46thAnnualAsilomarConferenceonSignals,Systems,andComputers,PacificGrove,California,USA,Nov.2012.
[9]GCaire,M.Debbah,SpecialIssueonMassiveMIMO[J].JournalofCommunicationsandNetworks,August2013,Vol.15,No.4.
[10]C.Shepard,H.Yu,N.Anand,etal.,Argos:
PracticalMany-AntennaBaseStations[C].inProc.ACMnt.Conf.MobileComputingandNetworking(MobiCom),Aug.2012.
[11]冯岩,SG研发争分夺秒[N}.国家无线电监测中心中国电子报,,2014年2月21日第004版
[12]T.Truong,W.Robert,Jr.Heath,EffectsofChannelAginginMassiveMIMOSystems[J].Journalofcommunicationsandnetworks,Aug.2013,vo1.
15,no.4,338-351.
[13]Kudo,R.Armour,McGeehan,etal.ChannelStateInformationFeedbackMethodforMassiveMIMO-OFDM[J].Journalofcommunicationsandnetworks.Vo1.15,No.4,August2013
[14]Jung,K.Minchae,L.Younsun,etal.OptimumNumberofUsersin
Zero-ForcingBasedMultiuserMIMOSystemswithLargeNumberof
Antennas[J].Journalofcommunicationsandnetworks,August2013.Vo1.15,No.4
[15]Hakkarainen,A.Werner,J.Dandekar,etal.Widely-LinearBeamformingandRFImpairmentSuppressioninMassiveAntennaArrays[J].JournalofCommunicationsandNetworks,Aug.2013,vol.15,no.4,
383-397.
[16]T.L.Marzetta,Noncooperativecellularwirelesswithunlimited
numbersofbasestationantennas[J].IEEETrans.SignalCommun,
Apr.2005,vo1.9,no.11,3590-3600.
[17]GCaireandS.Shamai,Ontheachievablethroughputofa
multi-antennagaussianbroadcastchannel[J].IEEETrans.Inf.Theory,2003,49(7),1691—1706.
[18]B.M.Hochwald,C.B.Peel,andA.L.Swindlehurst.Avector-perturbationtechniquefornear-capacitymultiantenna
multiusercommunication—PartII:
Perturbation[J],IEEETrans.Commun.,
2005,53(3),537-544.
[19]C.Windpassinger,R.F.H.Fischer,T.Vencel,eta1.Precoding
inmulti-antennaandmulti-usercommunications[J].IEEETrans.Wireless
Commun.,2004,3(7),1305—1316.
[20]F.Rusek.ScalingupMIMO:
opportunitiesandchallengeswithvery
largearrays[J].IEEESignalProces.Mag.,Jan.2013,vol.30,no.1,
40-46.
[21]Y.SunAfamilyoflikelihoodascentsearchmultiuserdetectors:
anupperboundofbiterrorrateandalowerboundof
asymptomaticmultiuserefficiency[J].SelectedAreasincommunications,IEEEJournalon,2009,57(6):
1743一1752.
[22]S.K.Mohammed.Low-complexitydetectionandprecodinginhighspectralefficiencylarge-MIMOsystems[D].Submittedforthedegreeofdoctorofphilosophyinthefacultyofengineering,2010.
[23]N.Srinidhi,S.Mohammed,andA.Chockalingam,Near-MLsignaldetectioninlarge-dimensionlinearvectorchannelsusingreactivetabusearch[J].IEEETrans.WirelessCommunications,2009,7}7):
2671-2681.
[24]P.Som,T.Datta,A.Chockalingam,etal.Improvedlarge-MIMOdetectionbasedondampedbeliefpropagation}C}.InformationTheoryWorkshop(ITW),2010,1-5.
[25]J.Hoydis,S.Brink,M.Debbah,MassiveMIMOintheUL/DLofcellularnetworks:
Howman3antennasdoweneed?
}J}.SelectedAreasinCommunications,IEEEJournalon31.22013:
160-171.
[26]A.Paul⑻,NabarR.,andGoreD.IntroductiontoSpace-TimeWirelessCommunications[N].UK:
CambridgeUniversityPress,2003.
[27]J.Jose,A.Ashikhmin,MarzettaTL,etal.Pilotcontaminationandprecodinginmulti-cellTDDsystems[J].WirelessCommunications,IEEE
Transactionson,2011,10(8):
2640-2651.
[28]D.J.LoveandR.W.Heath.LimitedfeedbackunitaryPrecodingforspatialmultiplexingsystems[J].IEEETransactionsonInformationTheory2005,51(8):
2967-2976.
[29]D.J.Love,R.W.Heath,T.Strohmer,eta1.Grassmannianbeamformingformultiple-inputmultiple-outputwirelesssystems[J].IEEETrans.Inf.Theory,2003,vo1.49,no.10,2735-2747.
[30]T.moueandR.W.HeathJr,KerdockcodesforlimitedfeedbackprecodedMIMOsystems[J].IEEETrans.Sig.Proc.,2009,vo1.57,no.9,3711-3716.