宽带小型高增益天线设计方法的分析

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1、万方数据AbstractAbstractWithwideapplicationinelectricequipments,theproblemsofelectromagneticcompatibility(EMC)areincreasinglyprominent,thegreatdemandofEMCtestisgrowing.Becauseofthelimitationofvolumeandtestspace,thesitetestmustbeadoptedwiththefeaturesofhighenvironm

2、entnoiseandsmallspacefortesting,whichshouldbeequippedwithbroadbandsmallhigh-gainantennas.Thispapermainlystudiesthedesignmethodofbroadbandactive/passivesmallbiconicalantennas.Firstly,thebroadbandmechanismofbiconicalantennasisanalyzed,andthenthedesignindicatorso

3、ftheactive/passivesmallbiconicalantennasbasedonthesitetestenvironmentaredemonstrated.Astheinputimpedanceofthesmallantennaalwayschangewithfrequency,weputforwardonebroadbandmatchingtechniquetoovercomethedifficultyofthebroadbandmatchingforactiveantenna,whichiscal

4、ledthelevelimpedancematching;inordertoavoidradiationcausedbytheunbalancefeedbetweenantennasandcoaxialline,weputforwardanotherbroadbandmatchingtechniquetoachievethebroadbandmatchingbetweenantennasandcoaxiallinewhichiscalledbalanced/unbalancedconverter.Thenthelo

5、w-noisehigh-gainamplifierisdesigned,byseveraldebuggingandactualtest,finallyweovercomemanydifficultiestosolveproblemsinthedesign,anddevelopthehigh-performancebroadbandactive/passivesmallbiconicalantennas,theindexesreachthelevelofthesametypeantennasabroadbycompa

6、rision.Keywords:EMCBroadbandMatchingLNAAntennaFactor万方数据万方数据目录目录第一章绪论.........................................................................................................................11.1本文研究背景及意义.........................................................

7、....................................11.2国内外的发展现状.................................................................................................21.3宽带有源/无源小双锥天线的概述.......................................................................41.3.1双锥天线的宽带化特性.........

8、.....................................................................41.3.2宽带有源小双锥天线的关键技术.............................................................61.3.3宽带无源小双锥天线的关键技术..........