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1、TransmissionMar.2007JournalofElectronicScienceandTechnologyofChinaV.01.5No.1TransmissionPropertiesdarWave1-"ropertiesoIarwavethroughReentryPlasmaSheathGAOZheng-pingl,-,MAZhao.guol,.,LIUJingl,.,LIZhong-ping3,ZHANGDa-hai31.EngineeringResearchCenterofElectromagneticWaveAbsorbingMaterial
2、s,MinistryofEducatice,UniversityofElectronicScienceandTechnologyofChinaChengdu610054China2.StateKeyLab.ofElectronicThinFilms&IntegratedDevices,UniversityofElectronicScienceandTechnologyofChinaChengdu610054China3.NationalKeyLaboratoryofAdvancedFunetienalCompositeMaterials,9200BoxB
3、ing100076ChinaAbstractInthispaper,bytakingintoaccountthecouplingoftheionizationofablationgasandatmosphere,anelectronsdensitydistributionmodelisbuflLUsingthismodel,thetransmissionpropertiesof蟠erentpolarizationradarwavethroughsheathareevaluatedonthebasisofthetransmissionmatrixtheory.Th
4、en.wediscusstheeffectsoftheelectronsdensity,theaddedmagneticfield,andtheradarwavefrequencyonthetransmissionproperties.Asaresultofthisinvestigation,greatertransmissionpowercouldbegainedinordertoefficientlyshortencommunicationblackout,byreducingtheelectronsdensityorchoosingproperaddedm
5、agneticlieIdandthefrequencyoftheradarwaveaccordingtothedilferentpolarizationformoftheradarwave.Keywordscommunicationblackout;plasmasheath;radarwave;reentry;transmissionproperties;wllenmilitarymissileslikeintercontinentalmissileandlong-rangestrategicmissilereenterstheaerosphereathyper
6、sonicspeeds,theatmosphereinfrontofthemissilesiScompressedandheatedup.Thesharplyincreasingtemperaturecausestheablationofradomeandionizationoftheablationgas.Then,aplasmasheathisformedwhichseriouslyattenuatesandreflectsthemicrowavestransmission,resultinginthecommunicationblackoutbetween
7、themissileandtheland.Anumberofexperimentsandtheoreticalinvestigationshavebeenproposedinrecentyearstoresolvethisproblem.Theabsorptionpowerandreflectionpoweroftheelectromangnatic(EM)waveweretreatedthroughmagnetized,stationary,seconddimensional,nonuniformplasmaandgottheirnumericalrelati
8、onshipswitht
