對稱及多芯電纜屏蔽性能測試.pdf

1、東南大學(xué)碩士學(xué)位論文對稱及多芯電纜屏蔽性能測試姓名：韋守龍申請學(xué)位級別：碩士專業(yè)：機械電子工程指導(dǎo)教師：周忠元20090601英文摘要ShieldingEffectivenessTestofSymmetricalandMulticonductorCablesBYWEIShou—longSupervisedbyProfessorZHOUZhongyuanEMClab，SchoolofMechanicalEngineeringSouthea

2、stUniversityNanjingChinaABSTRACTElectromagneticCompatibilityofthesymmetricalcablebecomemoreandmoreimportment鵲theusedfrequenceincreaSeThesymmetricalcableelectromagneticcompatibilityisdescribedbycouplingattenuationintheEN5

3、028916：2002Multiconductorcablesarewidelyusedinthecommunicationandcontroldomainandareusedinnavalships，airplane，cartierrocket，radarweaponryandSOonThispaperstudytheabsorbingclampmethodforthesymmetricalcablecouplingattenuati

4、oninthefrequency30MHz～1GHzandthelineinjectionmethodforthesymmetricalandmuffconductortransferimpedanceinthefrequency1MHz～100MHz。ThestudyiSdoneasfollow：1)TheresearchanddevelopmentofbalancetounbalancetransformerThebalanceto

5、unbalancetransformerareresearchedanddevelopedbylumpedparameterwayItsinsertionlossisbelow10dB，returnlossisabove6dB，meettherequirmentofEN50289一l_6：20022)TheresearchanddevelopmentofportlinkinstallationforsymmetricalcableThe

6、reliabilityisvalidated，solvethedifficultproblemofthesymmetricalcableterminalmatching3)Designthetestsystemoftheabsorbingclampmethod，analysethetsymmetricalcablecouplingattenuationTestthesamesymmetricalcable，discovertheresu

7、ltsameness，showtheinstallmionisreliableWhentestcouplingattenuationoftheunshieldingcategory5etwomethodareusedaSefoliow：CFixatetheabsorbingclamp，testinthenearandfarend@)1110Vetheabsorbingclamp，findthepeakpowerTheresultshow

8、that：thecouplingattenuationwhichistestedby②isless5dBthan①，the①isnotgetthepeakpower，thetestpatternonlyreflectthetrendofthecouplingattenuation4)Designtheimpedancematchingcircuitandthelineinjectiontestsystemtheimpedancematc

9、hingcircuiareresearchedanddevelopedbylumpedparameterwayItsinsertionlossisbelow6dB，returnlossisabove10dB，meettherequirmentofEN50289一l6：2002ThetestresultshowthatO)Testthetransferimpedance，itisabout25dBwhentranslatetransfer

10、impedancetoshieldingattenuationvalidatetheresultofthelineinjectionmethodandtheabsorbingclampmethod②TestthetransferimpedanceofthesymmetricalcableandmulticonductorwhentheylinktheimpedancematchingcircuitandnotThetestpattern