導(dǎo)體-介質(zhì)體混合目標(biāo)電磁散射問題的積分方程法研究.pdf

1、東南大學(xué)碩士學(xué)位論文導(dǎo)體介質(zhì)體混合目標(biāo)電磁散射問題的積分方程法研究姓名：陳書文申請學(xué)位級別：碩士專業(yè)：電磁場與微波技術(shù)指導(dǎo)教師：周后型20090228縫苧里絲!ABSTRACTForsolvingelectricallylargescaleandcomplexelectromagneticproblems，thecomputationalelectromagneticsthatmakesresearchonvariouskindsofn

2、umericalanalysismethodshasbeengreatlydevelopedThemethodofmoments(MoM)basedonintegralequationsisoneofthemostpopularmethodsinanalyzingtheelectromagneticscatteringproblemsTheMoMhashighprecisionandgoodstabilityhoweveritneeds

3、tosolveanalgebraicequationwithadensecoefficientmatrixIfweusetheiterativesolutionintheMoMtosolvethealgebraicequation，thestoragewillbeO(N2)andthecomplexityofcomputingwillbe忌O(N2)Here，Nisthenumberofunknownsandkisthatofitera

4、tionsSuchstorageandcomputingwillconsumecomputerresources，whichgreatlyconfmestheapplicationrangeoftheMoMTherefore，researchinganddevelopingoffastandefficientMoMbecomesoneofhottopicsincomputationalelectromagneticsOntheother

5、hand，whenreferringtothefamousinternationalacademicjoumal，IEEETransactionsonAntennasandPropagation，wefindthattheresearchonelectromagneticscatteringfromanyshapeofmixedconductordielectricobject(MCD)isalsooneofhottopicsnowad

6、aysInmilitaryandcivilfields，thedemandofanalyzingelectromagnetic—scatteringcharacteristicsofmixedconductordielectricobjectsofanyshapelikecoatedtargetsetc，makesitmoreexigenttomodelandsimulateMCDbodiesbynumericalmethodsThis

7、thesisfocusesontheresearchontheMoMmodelingofMCDbodies，especiallyonthebuildingofbasisfunctionsattheconductordielectricinterfaceSOastoenhancethenumericalprecisionoftheMoMmodelingbothinfrequencydomainandintimedomainThemainw

8、orksofthisthesiscomprisetwoparts：ThefirstpartintroducesthefrequencydomainMoMwithhighorderbasisfunctionsappliedtosolveMCDbodies’electromagneticscatteringproblems，andresearchesthebasisfunctionssuitabletomodelingtheboundary

9、conditionattheconductordielectricinterfaceThesebasisfunctionsareusedtoexpandtheelectricfluxdensityinthedielectricregionnearthesurfaceofthePECobject。SuchbasisfunctionsareconstructedbasedonthetraditionalSWGbasisfunctions，a

10、ndhencetheyCannotonlysatisfytheboundaryconditionthatthetangentialcomponentofelectricfieldshouldbezeroatthesurfaceofthePECobject，butalsoke印thecapabilityofmodelingobjectsofanyshapeThesecondpartisnaturallyextendingthefistpa