欢迎来到天天文库
浏览记录
ID:33072361
大小:4.49 MB
页数:97页
时间:2019-02-19
《手持终端一体化与宽频带宽波束天线分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
此文档下载收益归作者所有