雙負(fù)媒質(zhì)的寬頻散射分析.pdf

1、學(xué)位論文版權(quán)使用授權(quán)書名張論文儲憲全了啦徽膨關(guān)豫朗學(xué)位論支的摁定’有投保留并向翟家有莢部門殘祝構(gòu)遙交論文曲復(fù)印件和磁盤，免許論文祓整鬩和借liil本人授娥黼欲將學(xué)位論文約全部戎部分內(nèi)容編入有關(guān)數(shù)器庫避行梭索。I躲qlt1t1縮印或掃描等復(fù)銷手段保存，j【編學(xué)位論文《保密妁學(xué)位論文在解密后運(yùn)用本援毅書)廠印^學(xué)位論文鋒者鼢孫至’豪導(dǎo)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