高隔离度多极化mimo天线的分析与设计

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1、AbstractmeritoflOWVOlume．Secondly,adual··portpatchantennaofdual·-polarizeddirectionalradiationispresented．Thepatchelementisasquareoftwoopenslots．Thedesignedantennacanradiatethemicrostripantennamode，whichisexceedbycoaxialline，andthefoldeddipolemodeexceedbyacoplana

2、rstripe．Theexperimentalresultsshowthatovertheoperatingfi'equenciestheisolationbetweentwoportsisbetterthan23dB．Meanwhilethepolarizationisolationlevelsarelargerthan30dBatthemainradiatingdirectionforallthetwoports．ThisproposedantennaissuitedfortheWLANwall-mountedbas

3、e-stationsystems．Then，aunidirectional,dual—polarizedMIMOantennaisproposedforindoor2．4-GHzWLAN．Thisantennaconsistsofacavity·backedannularslotandtwoinvertedmicrostripfeedlineswhicharemutuallyorthogonal．Theexperimentalresultsshowthatthisantennahasmorethan32dBportiso

4、lation,andthecross-polarizedlevelsareless30dBthantheCO—polarizationovertheworkingband．ThecompactsizeandexcellentperformancesindicatethisdesignedantennacanbeeasilyappliedinindoorMIMOWLANbasestation．Onthisbasis，atri-polarizationMIMOantennaispresented，sincethatthefa

5、dingoforthogonalsignalareirrelevant．ThisantennahasgoodperformancesintheTD-LTEband．Finally,wesummarizethedesignkeypointsinthisthesisandproposethefurtherresearchobject．Keywords：MIMOantenna；Highisolation；Multipolarization；PatchantennaV目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．1

6、1．1移动通信系统概述⋯⋯⋯⋯．．．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．2MIMO技术的研究背景及意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．21．4论文主要内容和结构规划⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯12参考文献⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．13第二章MIMO天线的基础理论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．162．1天线的基本参数⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯162．2MIMO天线的特有参数⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯232．3提高MIMO天线单元隔离度的方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯．．272．4本章小结⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯39参考文献⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．39第三章双馈双极化微带天线⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯453．1徽带天线理论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯453．2天线的设计⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯523．2．1天线结构与分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一523．2．2实验结果与分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．543．3本章小结⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯5

8、7参考文献⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．57第四章共置双极化单向辐射天线⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．59V目录4．1引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯594．2天线结构与分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯594．3实验结果与分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯