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ID:40022592
大小:2.46 MB
页数:26页
时间:2019-07-17
《8. Electromagnetic Cloaks and Concentrators》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、FilippoCapolino/ApplicationsofMetamaterials_CFinalsPage--#8ElectromagneticCloaksandConcentrators.Introduction.........................................-.Formulation..........................................-FieldsInsideandOutsidethe
2、AnnulusoftheCloak.SphericalCloaks.....................................-PoyntingVectorandPhaseVelocityArthurD.Yaghjian.NonscatteringSphericalConcentrators...............-Concord,Massachusetts.CircularCylindricalCloaks..........................-
3、.NonscatteringCircularCylindricalConcentrators....-StefanoMaci.ImplicationsofCausality–EnergyConditions........-UniversityofSiena.Conclusions..........................................-EnricaMartiniAcknowledgments............................
4、.............-UniversityofSienaReferences.................................................-BeginningwithastraightforwardformulationofelectromagneticcloakingthatreducestoaboundaryvalueprobleminvolvingasingleMaxwellfirst-orderdifferentialequation,expli
5、citformulasfortherelativepermittivity–permeabilitydyadicandfieldsofsphericalandcircularcylindricalannularcloaksarederivedintermsofgeneralcompressedradialcoordinatefunctions.Thegeneralformula-tionisbasedontherequirementthatcloakingoccursforallpossibleincide
6、ntfieldsandthatcloakshavecontinuoustangentialcomponentsofEandHfieldsacrosstheiroutersurfaces,andzeronormalcomponentsofDandBfieldsattheirinnermaterialsurfaces.Thetangential-fieldboundarycondi-tionsattheoutersurfaceofthecloakensurezeroscatteredfields,andthen
7、ormal-fieldboundaryconditionsattheinnersurfaceofthecloakarecompatiblewithzerototalfieldsinsidetheinteriorcavityofthecloak.Forsphericalcloaks,unlikecylindricalcloaks,theseboundaryconditionsleadtoallthetangentialcomponentsoftheEandHfieldsbeingcontinuouslyzer
8、oacrosstheirinnersurfaces—cylindricalcloakshavingdeltafunctionsinpolarizationdensitiesattheirinnersurfaces.ForH-waveincidentfields,anonmagneticcircularcylindricalannulusisfound,whichhasnonzeroscatteredfieldsb
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