electromagnetic transmission through 通过电磁波传输

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1、HybridMethodAnalysisofElectromagneticTransmissionthroughAperturesofArbitraryShapeinaThickConductingScreenABUNGUNODERO1,DOMINICBOKONDITI1ALFREDVOTIENO21JomoKenyattaUniversityofAgricultureandTechnology2UniversityofNairobiAbstract–Inthispaperahybridnumericaltechniqueispresented,suitablefo

2、ranalyzingtransmissionpropertiesofanarbitrarilyshapedslotinathickconductingplane.Theslotisexcitedbyanelectromagneticsourceofarbitraryorientation.Theanalysisoftheproblemisbasedonthe"generalizednetworkformulation"forapertureproblems.Theproblemissolvedusingthemethodofmoments(MOM)andthefin

3、iteelementmethod(FEM)inahybridformat.Thefiniteelementmethodisapplicabletoinhomogeneouslyfilledslotsofarbitraryshapewhilethemethodofmomentsisusedforsolvingtheelectromagneticfieldsinunboundedregionsoftheslot.Thecavityregionhasbeensubdividedintotetrahedralelementsresultingintriangularelem

4、entsonthesurfacesoftheapertures.Validationresultsforrectangularslotsarepresented.Closeagreementbetweenourdataandpublishedresultsisobserved.Thereafter,newdatahasbeengeneratedforcross-shaped,H-shapedandcircularapertures.Key–words:Finite–ElementMethod,MethodofMoments,PerfectElectricConduc

5、tor(PEC)121Introduction12THEproblemofelectromagnetictransmissionthroughapertureshasbeenextensivelyinvestigated[1-6].Manyspecificapplications,suchasaperturesinaconductingscreen,waveguide-fedapertures,cavity-fedapertures,waveguide-to-waveguidecoupling,waveguide-to-cavitycoupling,andcavit

6、y-to-cavitycouplinghavebeeninvestigatedintheliterature.Bothintentionalandinadvertentaperturesofvariousshapesareencounteredinthemanyapplicationsoftoday'stechnologyespeciallyduetoincreasedscaleofutilizationofmicrowaveandmillimeter-wavebandsforcommunications,radar,industrialanddomesticapp

7、lications.Examplesofundesirableelectromagneticcouplingareleakagefrommicrowaveovensandprintedcircuitboards,electromagneticpenetrationintovehicles,andelectromagneticpulseinteractionwithshieldedelectronicequipment.TheseleadtoproblemsofElectromagneticCompatibility(EMC)andElectromagneticI