海上波導(dǎo)傳播特性試驗(yàn)分析與模理論研究.pdf

1、武漢理工大學(xué)碩士學(xué)位論文海上波導(dǎo)傳播特性試驗(yàn)分析與模理論研究姓名：涂良紅申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：凝聚態(tài)物理指導(dǎo)教師：劉成國(guó)20080401AbstractAtmosphericductpropagationisananomalouspropagationphenomenaassociatedwithspecificweatherconditionsWhenatmosphericductexists，iftheelectromagneti

2、cwavetransmitterlocatedintheductlayer，theelectromagneticwavelaunchedwiththeanglesmallerthanthecriticalangleandwithsmallerwavelengththanthemaximumtrappingwavelengthistrapedintheductlayerandductpropagationformsAtmosphericd

3、uctcanincreasetheerrorofradarranging，directionfindingandvelocitymeasuring，enhanceradarclutter，extenddetectionrangeandenlargethedetectiveblindzone。TheeffectofatmosphericductindicateswideapplicationincommunicationSoitisver

4、yimportanttoreserchtheenviromentcharacteristics，propagationcharacteristicsandapplicationsofatmosphericductFirstly，theeffectsofspaceenvironmentoncommunicationarediscribed，withemphasisonatmosphericductphenomenonincludingth

5、emeteorologicalconditions，structures，characteristics，basicconditionsofatmosphereductpropagationandasummaryonatmosphericductdistributionoverChinaInaddition，itsimpactsondetectionandcommunicationsystemandmeasurestomitigatet

6、heinfluencesaregivenSecondly，asanemphasis，amarineductpropagationexperimentisanalyzedindetailThisthesisdiscussesthebasicformofelectromagneticwavepropagation，lossmechanismandcalculationaboutpropagationdistance，andgeneralis

7、eslossregularofwavepropagtationanalysesexperimentaldatasintegratinglossmechanism，thefactorimpactingonexperimentaldatasintermsofexperimentalcircumstanceFinally，togetdistributionoftheelectromagneticfieldintensityonthearbit

8、rarypointinspace，investigatethemodetheory，deduceitdetailedlyintheory，representitskeyalgorithm，andpresenttheresultsofwavepropagtationlosswithmodetheory。TheresultsverifytrappingfunctionthattheductinducetowaveKeywords：Atmos