[电子信息精品论文] 时域有限差分方法在层状介质空间中的处理技术毕设外原文

《[电子信息精品论文] 时域有限差分方法在层状介质空间中的处理技术毕设外原文》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、毕业设计(论文)英文翻译原文院（系）：信息与通信学院专业：电子科学与技术学生姓名：XXXXXX学号：XXXXXXXXXX指导教师：XXXXXX职称：副教授2011年5月16日XXX毕业设计（论文）原文用纸第20页共21页CHAPTERIVAPPLICATIONEXAMPLESInthischapter,wepresentpracticalexamplesthatdemonstratetheuseofthetechniquesdevelopedinChapter2(NFFFT)andChapter3(TF/SFboundary)in

2、theFDTDanalysisofmultilayeredmedia.Inthepreviouschapters,weconsideredexamplesthatinvolvedthemethodthatisthesubjectoftherespectivechapter.Forexample,weonlyconsideredthefar-fieldradiationfromstructuresplacedonhalfspacesandgroundedslabsinChapter2.Similarly,weonlyinvestiga

3、tedtheperformanceoftheTF/SFboundary(namely,contain-mentoftheincidentplanewave,andtransparencytothescatteredwave)inChapter3.Inthischapter,webringintousebothofthemethodsdevelopedinChapter2–3;thatis,theexamplesutilizeboththeTF/SFboundary,andthenear-field-tofar-fieldtransfo

4、rm.4.1ScatteringinMultilayeredMediaInthissection,weconsidertwoproblemsthatinvolvethescatteringfromperfectlycon-ductingobjectsplacedinamultilayeredmedium,whentheincidentfieldisaplanewave.TheprocessofintroducingtheincidentplanewaveintotheFDTDgridnecessitatestheuseoftheTF

5、/SFboundaryformultilayeredmedia,whilethecalculationofthefar-zonefieldscatteredfromthescatteringobjectisdonebytheNFFFT.Forthisapproachtobesuccessful,thefieldsontheNFFFTboxinFig.6mustcompriseonlythescatteredfield.ThisisindeedthebasicpremiseoftheTF/SFboundarytechnique:allow

6、ingonlythescat-teredfieldtoexittheboundary.ThementionedtransparencyoftheTF/SFboundarytothescatteredwavewasdemonstratedinSection3.4.ThegeneralconfigurationusedforscatteringproblemsinmultilayeredmediaisshowninFig.33.TheTF/SFboundarycontainstheimperfections(orthescatterers

7、)inthemultilayeredmedium,denotedcollectivelyasA.FieldcorrectionsareappliedontheTF/SFboundarytocreateacontainedplanewave,denotedbythearrowintheupper-leftcorneroftheTF/SFboundary.Thescatteringstructurecreatesascatteredwave,denotedbythearrowintheupper-rightcorneroftheTF/

8、SFboundary.Thiswaveexitstheboundarywithcompletetransparency,andreachesthenear-field-to-far-fieldtransformer,denotedbySinFig.33