PAGE\*MERGEFORMAT22摘要本设计介绍了射频双频单极子天线的基本原理以及基于HFSS的射频双频单极子天线的设计过程。双频天线一个最为简单的颁发就是采用印刷单极子天线来实现，这类天线所需成本极低，而且结构和加工都极为简易，是目前为止众多学者的研究方向。本篇论文主要设计与仿真射频双频单极子天线。半波偶极子天线和单极子天线是迄今为止应用较为广泛的天线。利用镜像原理，引入接地面可以将半波偶极子天线的长度减少一半，即1/4波长单极子天线。然后，文中设计并仿真了一个单极子天线，能够使用在无线局域网中。其L型单极子天线由微带线直接馈电，天线工作于IEEE802.11a和802.11b两个工作频段，实现了天线的双频工作特性。仿真结果表明，该天线低频单极子天线垂直方向长度等于19mm时，该单极子天线的双频振点，也就是高频振点对应IEEE802.11a（5.15GHz~5.825GHz），低频振点对应IEEE802.11b（2.4GHz~2.4825GHz），能够应用在无线局域网所涉及到到相关频段力，同时具备较佳的辐射方向图性质。关键词：双频单极子；射频；WLAN；HFSSDesignofRadio-FrequencyMonopoleAntennaABSTRACT窗体顶端窗体顶端Thisdesignintroducesthebasicprinciplesofradiodual-bandmonopoleantennaandadual-bandradio-basedHFSSmonopoleantennadesignprocess.Printedmonopoleantennaasadual-bandantennaintheformofasimplestructure,easyprocessing,lowcost,isalsoahottopicintheantennafield.Inthisthesis,dual-bandmonopoleantennaRF.Theuseofimagetheory,theintroductionofgroundplanecanreducethelengthofthehalf-wavedipoleantennahalf,oraquarter-wavemonopoleantenna.Then,thepaperappliedtothedesignandproductionofadual-bandWLANprintedmonopoleantenna.TheantennaTheL-typemonopolemicrostriplinedirectlyfedantennaoperatinginthefrequencybandIEEE802.11aand802.11bbothworktoachievethecharacteristics.Measuredresultsshowthatthelow-frequencymonopoleantennaverticallengthequalto19mm,highfrequencyandlowfrequencyresonancepointofthedual-bandmonopoleantennadesignwerefallingIEEE802.11a(5.15GHz~5.825GHz)andIEEE802.11b(2.4GHz~2.4825GHz)workontheband,meettherequirementsofWLANband,andhasagoodradiationpatterncharacteristics.窗体底端窗体顶端Keywords:dual-bandmonopole;RF;WLAN;HFSS目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc419727538"摘要PAGEREF_Toc419727538\hIIHYPERLINK\l"_Toc419727539"ABSTRACTPAGEREF_Toc419727539\hIIIHYPERLINK\l"_Toc419727540"第1章绪论PAGEREF_Toc419727540\h1HYPERLINK\l"_Toc419727541"1.1本论文的研究背景PAGEREF_Toc419727541\h1HYPERLINK\l"_Toc419727542"1.2课题意义PAGEREF_Toc419727542\h1HYPERLINK\l"_Toc419727543"1.3双频天线研究现状PAG