武汉理工大学毕业设计（论文）一种室内环境适应型线状WI-FI天线的阵列优化设计学院（系）：**专业班级：**学生姓名：**指导教师：**PAGE\*MERGEFORMATII摘要WI-FI天线作为无线路由器的发射与接收器件，在路由器系统中起着关键性作用。为解决现阶段室内环境下的WI-FI信号发射不稳定，功率低、覆盖面积小等缺陷本文对于线状的WI-FI天线做出了优化。本文采用超材料特性天线，基于零阶谐振天线采用CSTMICROWAVESTUDIO商用仿真软件优化设计出了一付双频段的阵列天线，其覆盖2.4GHz和5.5GHz频段。因为超材料特性天线的谐振频率取决于物理结构上天线的长度，其原理上只能产生一个频段，所以在设计时采用复合左右手传输线理论，通过在天线之间串并联电容的方式改变谐振频率。在本次设计中通过调节天线结构尺寸，得出左右手传输线中串联电容0.218pF，并联电容忽略，且天线传输线为谐振频率的四分之一波长。结果得出：系统的工作频率为2.4GHz和5.5GHz，5.5GHz时天线传输线为13mm，2.4GHz时天线传输线为34mm。其增益分别为4.83dBi和3.03dBi,天线在辐射方向上为全向性。通过研究结果表明，对于超材料天线的阵列优化设计，实现对了天线的增益的提高，改善了天线发射效率，使天线具有了更好的全向性,更适用于无线WI-FI的应用。关键词：WI-FI应用；线天线；路由器；超材料天线AbstractAsthetransmitterandreceiverofwirelessrouter,WI-FIantennaplaysakeyroleintheroutersystem.Inordertoimprovethesignaltransmitpowerandgainofwirelessrouter,tosolveIndoorenvironmentthedeficiencyofWI-FIatpresent,suchastheinstabilityofWI-FIsignalemission,lowpower,smallcoveringarea,etc.ThispapermakesmajorizationfortheoptimizedlinearWI-FIantenna.Usinghighdielectricantenna,thisthesisisaccordingtothezero-ordermodelandbasedonCSTMicrowaveStudiocommercialsimulationsoftwaretooptimizethedesignaswellasmeettheprotocolapplicationofWI-FI802.11n.Thedesignofsupermaterialantennaisderivedfromthemodelofzero-order,whichcanonlyproduceabandinprinciple.Sointhedesignofthecompositeright/lefthandedtransmissionlinetheoryandtheinbetweentheantennasonshuntcapacitancechangetheresonantfrequencyandinthedesignbyadjustingthesizeoftheantennastructure,anddrawaseriescapacitor0.218pFandparallelcapacitorignored.Theresonantfrequencyofsupermaterialantennadependsonthelengthofantennainphysicalstructure.Theoperatingfrequencyofthesystemis2.4GHzand5.5GHzandthegainis4.84dBiand3.03dBirespectively.Researchesshowthattheoptimizeddesignofsuperdielectricantennaimprovesthegain,emissionefficiencyandsafetyofantennaaswellasmeetsthemarketdemandbyemployinglow-costmaterial.Keywords:WI-FIapplications;wireantennas;Router;metamaterial-inspiredantennas目录TOC\o"1-3"\h\uHYPERLINK