電大尺寸目標(biāo)電磁散射特性的時(shí)域分析.pdf

1、南京理工大學(xué)碩士學(xué)位論文電大尺雨目標(biāo)電磁散射特性的時(shí)域分析姓名：陳磊申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電磁場(chǎng)與微波技術(shù)指導(dǎo)教師：葉曉東；陳如山20090624碩士論文AbstractRecentlywiththedevelopmentofshortpulse(broadband)communicationandradarsystems，thetimedomainnumericaltechniquesoftransientelectromagnet

2、icscatteringhaveattractedextensiveattentionsInparticularthetimedomainversionsofvariousfrequencydomainhighfrequencytechiuquesappliedtoperfectlyelectricallyconducting(PEC)targetshavebeendevelopedgreatlyComparedwithtime—dom

3、ainlowfrequencymethods(suchasFDTD，TDFEM，TD—MoM)，timedomainhighfrequencytechniquesrequirelesscomputermemoryandsimulationtimeThisthetisbrieflyintroducesthehi班frequencytechniques，suchasPhysicaloptics(PO)，equivalentedgccurre

4、nts(EEC)andshootingandbouncingrays(SBR)atthebeginingofeachchapterandthenfocusesthemainefforts011theresearchesofthecorrespondingtime—domainversionsofthesehighfrequencytechniquesThemaincontributionsofthisthesisalelistedasf

5、ollows：Firstlytheexpressionsoftime—domainPhysicaloptics(TDPO)arederivedfromtheexpressionsofPOthroughtheFourierinversionandthebasictheoriesofPOmethodarealsosummarizedSecondlytheexpressionsoftimedomainequivalentedgecurrent

6、s(TDEEC)arederivedfromtheexpressionsofEECthroughtheFourierinversion，andthebasicformulationsofEECmethodarealsointroducedThescatteringfieldofTDPOiscorrectedeffectivelythroughthetime—domaindiffractedfieldofedgecomputedbyTDE

7、ECandtheaccuracyofTDPOisimprovedThirdlyTDSBRisstudiedtocalculatetheelectromagneticscatteringarisingfrommultiplebouncesFinall5RCSoftargetcoatedwithradarabsorbingmaterial@AM)isstudiedandanalyzedbyhighfrequencymehodsNumeric

8、alresultsdemonstratetheaccuracyandefficiencyoffrequency—domainandtimedomainhi曲frequencymethodsdiscussedinthisthesis，。KeyWords：high—frequencymethodwidefrequencybandradarcrosssection(RCS)，time—domainphysicaloptics，time—dom