cbtc系统缝隙波导信号传输性能的分析

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1、ABSTRACTABSTRACT：Nowadays，CBTChavebeenappliedinmoreandmorelinesofufbaIlmasstransitswithitsdevelopment．Leakywavegnidehasagoodanti-disturbancecapacitywiththestablesignalthroughtheresultsoftestforoperationlineandtestingline．LeakywaveguidehasbeenappliedinDCSofCBTCsuccessfully．A

2、sleakywaveguideismainlyappliedinelevatedbridgesectionoflineofurbannlasstransits。itwillbeinfluencedbyextremelybadweather．Itisimportantforguaranteeingthesystemtooperatenormallytosimulateandtesttheextremecase，suchaLsabsorbingwater,absorbingmetal，andcoveredbysnow,duringoperatio

3、nandtesting·ThispapersimulatesandanalyzesleakywaveguidewithHFSS，asoftwareforhighfrequencyelectromagneticsimulation，aimingattherelatedproblemscausedfromoperatingleakywaveguideofCBTC．Combiningdataoftestinglinesandoperationlines，thispaperanalyzestheperformanceofWLANsignal，whic

4、hisusedtotransmitdatainCBTC．First，thispaperintroducestheprincipleofleakywaveguide，describingthemethodsofmodelingforleakywaveguidewithfiniteelementtheory；thenthispaperestablishesthetransmissionmodelofleakywaveguidewithHFSS，simulatingandanalyzingthreeextremecases；absorbingwat

5、er,coveredbysnow,andabsorbingmetal．Combiningwithdatainlines，theresultsofsimulationareanalyzed，andthemodelsareoDtimized．TheresultsofsimulationCallbeconsideredasreferenceforapplyingandmaintenceofleakywaveguide．Duetothelimitedcontextandtheoryknowledgeofauthor,thispaperhasnotre

6、searchedtheelectromagnetictheorydeeply．Therefore，someproblems，suchasthathoWdoesrelativepermittivitytheperformanceofWLANsignalinleakywaveguide，needtobesolvedfurther．KEYWORDS：Leakywaveguide；CBTC；HFSS；SnowcoverCLASSN0：目录CBTC系统缝隙波导信号传输性能的研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯i中文摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．iiiABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．ivl绪{念⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．1缝隙波导在铁路上的应用现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1．1CBTC系统⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯l1．1．2缝隙波导的理论研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．1．3缝隙波导在实际运营中所遇到的问题⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯41．2选题背景、目的和意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯51．3

8、本文主要研究内容和章节安排⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．62矩形波导和缝隙天线的理论基础⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．72．1矩形波导的传输特性⋯⋯⋯⋯⋯⋯⋯⋯