高增益全向圓極化海上移動天線的研究.pdf

1、大連海事大學碩士學位論文高增益全向圓極化海上移動天線的研究姓名：黃子旻申請學位級別：碩士專業(yè)：信息與通信工程（通信與信息系統(tǒng)）指導教師：房少軍20100601英文摘要ABSTRACTWiththedevelopmentofmarineshjppingindustry，inordertoimprovethereliabilityoftheshipping，therequirementstomarinewirelesscommunicati

2、onarebecomingmoreandmoredemandingAntennaisdesignedastheportalofthewirelesscommunication，itsperformanceisdeterminingtotheentiresystemHighgainomnidirectionalcircularlypolarizedantennaformarinewirelessismeaningfulInmarinewi

3、relesscommunicationit’SdifficulttopredicttheexactlocationofmobileshipsSoomnidirectionalantennaisthefirstchoiceforitstransmittingandreceivinginfomaationfloraeverydilx蜘OnComparingtOthelandmobilecommunicationmarinewirelessc

4、ommunicationiseasilydeterioratedbyclimateandseawaveAdoptingcircularlypolarizedtechnique研mwhichmulfipathinterference(MPOcaIlbesuppressedhighperformanceantennacanbeobtainedInthepaperhi曲gainomnidirectionalcircularlypolarize

5、dantennaisdesignedformarinewirelesscommunicationSleevedipoleischosen雒antennaarrayelementbecauseofitsomnidirectionalradiationanditsconfigurationasantennaarmyInthearray，serialfeedingischosen弱thefeedingmethodByloadingparasi

6、ticallyexcitedantennaelementinthefarfieldwecarlgetapairofquadraturecomponents，whichhavethesamemagnitude，SOcircularlypolarizedantennaisreadilyobtainedDuetothedemandingrequirementsofreliabilityandperformanceinthepracticale

7、nvironment，thebandwidthisextendedtosatisfytherequirementsoftheengineeringspecificationusingmicroslripmatchingcircuitTheperformanceoftheantennaisverifiedbysimulationandexperimentThedatafromexperimentmeaSurementindicatesth

8、atantennagainreachesmorethan4dBi，theimpedancebandwidthis150MHz(VSWRI5)andthecircularlypolarizationbandwidth(axialratio3dB)is90MHzwhenitoperatesatitscentralworkingfrequency(f=245GHz)Thesimulationandtestresultshavegoodcons

9、istencyTheantennafeaturessmallsize，simpleandcompactstructureMeanwhileitisinexpensiveandhaspracticalsignificanceKeyWords：SleeveDipoleAntenna；OmnidirectionalCircularlyPolarizedAntenna；AntennaArray；MicrostripMatchingCircuit