electromagnetic transmission through 通过电磁波传输

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1、AHybridFiniteElement/MomentMethodforSolvingElectromagneticRadiationProblemofArbitrarily-ShapedAperturesinaThickConductingScreenABUNGUNODERO1,DOMINICBOKONDITI1ALFREDVOTIENO21JomoKenyattaUniversityofAgricultureandTechnology2UniversityofNairobiAbstract–Inthispaperahybridnumer

2、icaltechniqueispresentedforcharacterizationofthetransmissionpropertiesofathree-dimensionalslotinathickconductingplane.Theslotisofarbitraryshapeandisexcitedbyanelectromagneticsourcefarawayfromitsplane.Theanalysisoftheproblemisbasedonthe"generalizednetworkformulation"foraper

3、tureproblems.Theproblemissolvedusingthemethodofmoments(MOM)andthefiniteelementmethod(FEM)inahybridformat.Thefiniteelementmethodisapplicabletoinhomogeneouslyfilledslotsofarbitraryshapewhilethemethodofmomentsisusedforsolvingtheelectromagneticfieldsinunboundedregionsoftheslot

4、.Thecavityregionhasbeensubdividedintotetrahedralelementsresultingintriangularelementsonthesurfacesoftheapertures.Validationresultsforrectangularslotsarepresented.Closeagreementbetweenourdataandpublishedresultsisobserved.Thereafter,newdatahasbeengeneratedforcross-shaped,H-s

5、hapedandcircularapertures.IndexTerms–Finite–ElementMethod,MethodofMoments,PerfectElectricConductor(PEC)I.INTRODUCTIONTHEproblemofelectromagnetictransmissionthroughapertureshasbeenextensivelyinvestigated[1-6].Manyspecificapplications,suchasaperturesinaconductingscreen,waveg

6、uide-fedapertures,cavity-fedapertures,waveguide-to-waveguidecoupling,waveguide-to-cavitycoupling,andcavity-to-cavitycouplinghavebeeninvestigatedintheliterature.Bothintentionalandinadvertentaperturesofvariousshapesareencounteredinthemanyapplicationsaffordedbytheadvancesinte

7、chnologyandincreasedscaleofutilizationofmicrowaveandmillimeter-wavebandsforcommunications,radar,industrialanddomesticapplications.Examplesofundesirablecouplingareleakagefrommicrowaveovensandprintedcircuitboards,electromagneticpenetrationintovehicles,andelectromagneticpulse

8、interactionwithshieldedelectronicequipment.TheseleadtoproblemsofElectromagneticCompatibil