手持终端一体化与宽频带宽波束天线分析

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1、II手持终端一体化与宽频带宽波束天线设计万方数据ABSTRACTIIIABSTRACTwiththerapiddevelopmentofsatellitenavigationsystem，thesatelliteterminalbecomesmallerandsmaller.Atthesametime,thesatelliteterminalantennasarerequiredtominiatureandhaveagoodperformance.Inaddition,astheunitofphased-arrayantennaandahotreseachtopic,theperf

2、ormanceofwidebeamantennadirectlyaffectsthescanningcapabilityofphased-arrayantenna.Themaincontextsofthethesisareasfollows:Firstly,thesatelliteterminalantennaisrequiredtobeinstalledonametalplatformwithasizeof130mm×70mm×15mmandcoverthreedifferentfrequencybandswithdifferentcircularlypolarizedchara

3、cteristics.Thedesigndifficultiesoftheartareindicated.Adouble-layermicrostrippatchantennafeedbya3-dBstriplinedirectionalcouplerisadopttorealizethepropertyoftwodifferentpolarizations,highdielectricsubstrateandloadingslotsareusedtominiaturizeandimprovehighisolationbetweenantennaunits.Secondly,som

4、edifficultiesinachievinghighperformanceofbroadbandwidebeamantennaarepointedout.OnthebasisofanalysisonordinaryVivaldiantennas,anewtypeofVivaldiantennawithwidebeamandsmallsizeisdesigned.Theperformanceofwidebeamisrealizedbyslip-slotsandhighdielectricmaterial,whiletheminiaturizedstructureisachieve

5、dbycorrugations.ComparedwiththeconventionalVivaldiantenna,theproposedantennaonlyhasadimensionof0.3λ0×0.31λ0at1.8GHz(60mm×65mm)，andhas6-dBbeam-widthofmorethan130°from1.8GHzto3.6GHz.Keywords:Thedual-banddual-polarizedantennaHighisolationwidebeamantenna万方数据IV手持终端一体化与宽频带宽波束天线设计万方数据目录V目录摘要.........

6、..............................................................................................................IABSTRACT..........................................................................................................III目录................................................................

7、......................................................V第一章绪论.........................................................................................................1§1.1手持终端一体化与宽频带宽波束天线概念...........................................1§1.2