5米法電波暗室性能預(yù)測(cè).pdf

1、大連理工大學(xué)碩士學(xué)位論文5米法電波暗室性能預(yù)測(cè)姓名：靳順濤申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：劉萍20051201凝矮濤：5米法電波磅室性熊顙測(cè)PerformanceEvaluationofA5meterAnechoicChamberAbstract玨isquiteexpensivetobuildananechoicchamberandwithanintegratedconsiderationofcostandperform

2、anceitisnecessarytoevaluateitsperformancebeforetheconstmcfiomnlcpaperadoptsthetheoriesofelectromagneticpropagationwavereflectiontodiscusstheperfommceevaluationmethodofanewtypeelectromagneticcompatibility(EMC)measurememen

3、vironment—a5meteranechoiechamberintheentireworkfrequencybands(30姚～1000舭)withthefocusofitskeyparameter—normalizedsiteattenuation(NSA)evaluationsandanalyseswiththeapplicationofRayTracingMethodandFDTDmethodatthecorrespondin

4、gfrequencybandsItappliesraytracing霍Dmethodenmbinedwiththediscretefi宅xluencysweepingmethodoftunabledipoleantennainthefrequencybandsof300MHz～1000h冊(cè)kEMWavesareregardedasaserialofradialbunchesandinnerwallsandthecedingofthech

5、amber躺discretewith1／hiformsizeofbasesizeofthe№MdEMabsorbersReflectionnumberforeachmyhasbeenaddedto3comparedtothetraditionalcountof王andanewmatrixsolutiontocombinedequationsofrays’tracksandinsidewalls協(xié)obtainthereflectionpo

6、intshasbeenaaoptedwhichgreatlyenhancedtheoperationefficiencyElectricfieldsstrerethsareoverlappedinvectorateachdiscreteunitoftheinnerwallandthenitobtainstheelectricfielddistribufion。sofeachwallwitharadiationsoH凇ofdoubletd

7、ipoleantennawhichdeterminesbasicallythemainreflectionareasofeachwall，andthenthepaperfurtheaevaluatedthenormalizedsiteattenuation(NSA)value弱撼resultshowsthatwhentheantennaisinbothverticalandhorizontalpolarizationthepredict

8、ionvaluescomplywith4dBRuleofthetheoreticalvaluesobtainedfromtheopenareatestsite(OATS)n撼thesisalsooffersalayoutofhybrid鞠鐮absorberswithacoverageratiolessthan80。4。Infrequencybandsof30MHz～300MHzfinitedimensiontimedomain(FDTD

9、)methodisusedtocav]outtheevaluation。AtthefoundationofstudyingtheFDTDtheorythepapermodelsandsimulatestheprocessofEMwavepropagationanditstransmissionandreceivingintheantellnawiththeapplicationofmatrixprocessingSO孫hareThesi

10、mulationprocedureof3dimensionsymme砸cdipoleantennahasbeennlakeupandthenthepaperdisenssesdetailedthesimulationcons咖ctionoftheantennaandpromptSOnlce如_】cindoorfieldstrengthdistributionsarecalculatedviasimulatingthereflection

11、ofconductorboardandftirtheritdisenss。stheNSAevaluationofachamberequippedwithFerriteriflesSeenformperfommceevaluationcurvesofNSAintowsectionoflowfrequencybands，about30^征k～100M】thedifferencebetweenevaluafionandtheoreticalo