互易性定理在粗糙海面與目標(biāo)復(fù)合電磁散射中的應(yīng)用.pdf

1、西安電子科技大學(xué)碩士學(xué)位論文互易性定理在粗糙海面與目標(biāo)復(fù)合電磁散射中的應(yīng)用姓名：楊帆申請學(xué)位級別：碩士專業(yè)：無線電物理指導(dǎo)教師：郭立新20090101AbstractAbstractFirstlybasedontheLorentztheoremofreciprocitythereciprocityofthetwotargetsinthehalfspaceincludingtheroughsurfaceisderivedandthenis

2、appliedtothecompositescatteringbetweenroughsurfacesandtargets，SOthetotalcompositescatteredfieldcailbesplitintofirstorderscatteredfield，secondordercouplingscatteredfieldandthirdordercouplingscatteredfieldThistheoremsuppli

3、estheoreticalfoundmionforthecompositeelectromagneticscatteringUsingthetheoremofreeiprocitythecompositeelectromagneticscatteringfromasphericaltargetaboveaconductor(dielectric)seasurfaceisanalyzedThenumericalresultsoftheba

4、ckscatteringradarcrosssections(RCS)withthedifferentincidentangleforthesphericaltargetabovetheseasurfacearepresentedThedifferencesbetweenthebackscatteringcompositeRCSoftheconductorseasurfaceandthatofthedielectricseasurfac

5、earegivenThedependenceofthecompositebackscatteringandsecondarycouplingRCSoftheconductor(dielectric)seasurfaceontheheightofthesphericaltargetabovetheseasurfacearediscussedMeanwhile，usingthephysicalopticsmethod，themomentme

6、thodandthemethodofequivalentedgecurrents(MEC)，theRCSoftheconductorplate，thecylinderandtheGone—cylinderalecalculatedFinallythecompositescatteringfromaconecylinderaboveatime—varyingdielectricseasurfaceisinvestigatedwiththe

7、theoremofreciprocityThescatteredfieldfromthetargetandthecouplingscatteredfieldarecalculatedbyMECThebackscatteringRCSandthecharacterisficsoftheDopplerspectrumarediscussedindetailKeywordsTargetRoughSeaSurfaceCompositeElect