低剖面宽带全向天线分析 (1)

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1、ABSTRACTABSTRACTThispapermainlyfocusonthestudyofwidebandlow-profileomni-directionalantenna,whichisdividedintotwogroups,miniaturizedwireantennasandbroadbandomni-directionalmicrostripantennas.Thelatterismainlystudied.Twoantennasusedindifferentareasareproposed,meanwhile,theirequivalentcircu

2、itsaredisgussed.Forminiaturizedwireantenna,conicmonopoleantennaandsleeveantennaaremainlydisgussed.Furthermore,basedonthetheoryandpre-existingstructure,awidebandsleeveantennaworksinUHFbandwithabandwidthof2.3timesfrequencyisproposed.Foromni-directionalmicrostripantenna,onthebasisofitsworki

3、ngmode,themethodsofequivalentcircuitareusedtoanalyzetherelationshipbetweentheshort-circuitpinandtheTM01mode,amicrostripantennawithaheightof0.07?Landaradiusof0.15?Lispresented,whichhasaVSWRoflessthan2atafractionalbandwidthbandwidthof37%.Takingconicmonopoleantennaandomni-directionalmicrost

4、ripantennatogether,conicmonopoleantennaworksasthefeedofashort-circuitpinringmicrostripantenna,Comprehensivelyuseofthetechnologyofloadedantennaandelectromagneticcouplingfeeding,twoantennasworkondifferentfrequencywith3timesfrequencyareproposed,whosesizemeetstheengineeringrequirementsgoodim

5、pedancecurvefitting,whichcontributestoacleareranalysisoftheantennastructureandfurtherimpedancematchingwork.Keywords:lowprofilebroadbandomni-directionalconicmonopolemagnetismcurrentringequivalentcircuits目录目录第一章绪论.............................................................................

6、........................................11.1研究背景与意义........................................................................................................11.2低剖面宽带全向天线概述........................................................................................21.3文章结构安排....................

7、........................................................................................2第二章小型化宽带单极子天线.....................................................................52.1单极子小型化技术.........................................................................................