時域有限差分方法在復(fù)雜目標(biāo)散射和光學(xué)微腔中的應(yīng)用.pdf

1、西安電子科技大學(xué)碩士學(xué)位論文時域有限差分方法在復(fù)雜目標(biāo)散射和光學(xué)微腔中的應(yīng)用姓名：劉建勇申請學(xué)位級別：碩士專業(yè)：光學(xué)指導(dǎo)教師：韓一平20080101AbstractABSTRACTFiniteDifferenceTimeDomain(FDTD)methodanditsapplicationsinelectromagneticscatteringofcomplexobjectsandresonancebehaviorsofopficalm

2、ierocavitiesarestudiedrespectivelyThefollowingworkhasmainlybeendoneBothtwo—dimensionandthreedimensionFDTDprogramsaredesignedThedynamicvisualizationapproachofelectromagneticfieldsisproposedandimplementedbyusingmixedprogra

3、mminginFortranandMATLABAnautomaticmeshgeneratingsoftwareforFDTDsimulationsisrealizedwithVBA，whichisbasedonAutoCADenvironmentTheoctreeoptimizationstrategyisintroducedtoimprovethetimeconsumingandmemoryrequirementAnanalysis

4、ofradarscatteringcharacteristicsofcomplexobjects，suchasmissilesandtanksispresentedThebehaviorsofmorphologicaldependantresonanceofdielectriccylindricalmicrocavitiesilluminatedbyplanewavearegivenintheframeworkofLorentz—Mie

5、theoryTheresonancelocationfullwidthathalfmaximum，qualityfactorandfreespectralrangearediscussedindetail，andthentheresonantpaaemsofinternalfieldarecalculatedSimulationresultsofcylindricalmicrocavitybyFDTDprogramsarecarried

6、outtocomparewithMietheoreticresultsCylindermierocavitieswitllellipticalandrou【ghsidewallareinvestigatedonimpactofthedeformationandsurfaceperturbationontheintrinsicalcharacteristicsofthemierocavitiesThekspacetheoryofsquar

7、e—shapedmierocavityisintroduced，andalsotheFDTDresultsaregivenAsoftwarebasedonFDTDprincipleisdevelopedwithmixedprogramminginC，ⅥmalC，F(xiàn)ortranandMATLAB，whichissuitableformierocavitieswimarbitraryshapecoupledbydielectricslabw