A planar UWB Antenna with band rejection characteristic.pdf

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1、APlanarUWBAntennawithBandRejectionCharacteristicKyoung-MinKim,Sung-KyoPark,In-SuNa,Chong-BaekParkDeptofElectronicEngineeringChosunUniversity#375Seosuk-dong,Dong-gu,Gwangju501-759KoreaAbstract-Thispaperpresentsaplanarultra-widebandbroadbandsystemasthirdgenerat

2、iontechnology.Also,itisa(UWB)antennawithbandrejectioncharacteristicforUWBsystemthatusespulsewithveryshortdurationwidthbelow1communications.AplanarrectangularpatchisprintedonaPCBnsanddoesnotusecarrierwaveforinformationtransmission.withε=4.4(FR4)andthevolumeoft

3、hisantennais30×30×1.6㎣.TheapprovalspecificationofUWBapprovedbytheFederalToobtainthebandrejectioncharacteristic,wemadethepartialCommunicationsCommission(FCC)mustsatisfynoisegroundwithwidthof30㎜andlengthof2㎜ontheotherintensityof-41.25dBm/㎒andrelativebandwidthof

4、20%,planeofthepatch.Byaddingabranchedfeedline,weobtainedincreasedbandwidth.Also,theadditionofbevelsonbothedgesandfrequencybandwidthwithgreaterthan500㎒in3.1~ofarectangularpatchincreasedthebandwidth.Forthe10.6㎓band[2].ThephysicallayerspecificationofUWBoptimized

5、parameters,simulationsareperformedbyusingrequiresmorethan10min110Mbpsandmorethan4minANSOFTHFSS.Theaveragemeasuredreturnlossis-8.2㏈in200Mbpsfortransmissiondistancefromtheviewpointof3.1~4.8㎓LowBandanditshowsnotsogoodcharacteristic.respondingdatatransmissionspee

6、dandtransmissiondistance,Butbandrejectioncharacteristicin4.9~6.8㎓bandshowsandrequireswaitingmodeandconsumptionpoweroflessbetterperformancethanthesimulation.Thisantennaprovidesthan100mWin110Mbpsandlessthan250mWin200nearlysameH-planepatternsat5㎓betweenthesimula

7、tionMbps.Also,itisrequiredthatsinglenetworkshouldprovidesandthemeasurementbutitshowsamarkeddifferenceat6㎓.maximum256connectionsandmakessimultaneous4Andthegroupdelayislessthan1.2nswithalittlevariationconnectionspossible.exceptthemaximum4.2nsat7.17㎓.Therearewir

8、elesssystemsextensivelyrequiredtobeIfthereturnlossinLowBandcanbeimproved,thisproposedharmoniouswithUWBsuchasIEEE802.11a/b,IEEEantennawillsatisfytheUWBspecificationsoftheMIC(ministry802.15