雙負媒質的寬頻散射分析.pdf

1、學位論文版權使用授權書名張論文儲憲全了啦徽膨關豫朗學位論支的摁定’有投保留并向翟家有莢部門殘祝構遙交論文曲復印件和磁盤，免許論文祓整鬩和借liil本人授娥黼欲將學位論文約全部戎部分內容編入有關數(shù)器庫避行梭索。I躲qlt1t1縮印或掃描等復銷手段保存，j【編學位論文《保密妁學位論文在解密后運用本援毅書)廠印^學位論文鋒者鼢孫至’豪導挪簽諺—A簽字囂期：知11年毋蔑9簽字日麓：=；Tj／1工作肇?。和ㄓ嵉刂罚弘娫挘后熬帲盒技m隊年≯月，≈目A

2、bstractAbstractThedouble—negative(DNG)metamatefialisakindofartificialcompositematerial，inwhichboththedielectricpermittivityanddielectricpermeabilityarenegativeThismaterialiSalsocalledleft—handedmaterialDNGmetamaterialhas

3、alotofstrangefeatures，suchasnegativeindexofrefractionmaterial，backwardswavemetamaterialsetcIthaspotentialapplicationinfieldsofelectromagnetics，optics，andmaterialsTherefore，accuratelyanalyzingtheelectromagneticcharactersi

4、ntheDNGmetamaterialismoreandmoreimportantFirstly，thepaperintroducesthesignificanceofDNGmetamaterialandtheelectromagnetictransmissioncharacteristicsofitThebasicconceptsandrelatedknowledgeofmethodofmoments(MOM)isintroduced

5、Theasymptoticwaveformevaluation(AWE)，asafrequency—sweepanalysismethod，isappliedtoperfectlyelectricalconducting(PEC)objectsanddielectricobjectsTheresultsobtainedbyAWEagreewellwiththatofexactsolutionordirectMOM，andthecompu

6、tationalefficiencyisimprovedsignificantlybyAWESecondlytheasymptoticwaveformevaluation(AWE)techniqueisappliedtoelectromagneticscatteringanalysisofdoublenegative(DNG)metamaterialThePMCHWTequationoftheDNGmetamaterialisdeduc

7、edbasedonitsconstitutiverelationshipAndthesurfacecurrentsandradarcrosssection(RCS)atasinglefrequencypointiscomputedTheimpedancematrixelementsareprocessedtoachievehigh—orderderivationcomputationThentheAWEtechniqueisapplie

8、dtoobtainbroadbandRCSfrequencyresponseoftheDNGmetamaterialAgoodagreementcallbeseenbetweenAWEandtheexactsolutionAndthecomputationalefficiencyisimprovedsignificantlyFinally，inorderteducethecomputationcomplexityofhigh—order

9、derivationcomputationinAWE，model—basedparameterestimation(MBPE)techniquesisintroducedSinceforthesamematrixequationtheorderofderivationforimpedancematrixelementsCallbereduced，theMBPEhasmoreadvantagesinthefrequencysweepana