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1、空军工程大学毕业论文（设计）摘要微带天线具有体积小，重量轻，低剖面，制造成本低，易于批量生产，易于和微带线路集成等特点，能得到单方向的宽瓣方向图，易于实现双频段、双极化等多功能工作。这些优点使得微带天线在大约100MHz～100GHz宽广频域上，广泛应用于包括卫星通信、雷达、遥感、制导武器以及便携式无线电设备。论文首先回顾了微带天线的发展史，介绍了它的结构、优缺点及应用，然后给出了微带天线的几种分析方法，包括传输线法，空腔模型法，积分方程法等，并介绍了微带天线圆极化的原理和实现方法以及微带天线的馈电方
2、式。然后在AnsoftHFSS中创建了一个单馈圆极化微带天线和双馈圆极化微带天线，分析了S11和VSWR参数，画出了方向图。为了实现圆极化，进行了轴比的优化仿真，达到了较为理想的结果。关键词：微带天线、圆极化、轴比I空军工程大学毕业论文（设计）AbstractThemicrostripantennashasthevolumetobesmall,theweightislight,thelowsectionplane,theproductioncostislow,easyvolumeproduction,
3、easyandcharacteristicsandsoonmicrostriplineintegration,canobtainthesingledirectionwidepetaldirectionaldiagram,easytorealize,thedoublepolarizationdualrangeandsoonmulti-purposework.Thesemeritscausethemicrostripantennasinapproximatelythe100MHz-100GHzbroadf
4、requencyrange,widelyappliesinincludesthesatellitecommunication,theradar,theremotesensing,theguidedweaponaswellastheportablewirelessapparatus.Thepaperfirstreviewedmicrostripantennas'shistory,introduceditsstructure,thegoodandbadpointsandtheapplication,the
5、nhavegivenmicrostripantennas'sseveralanalysismethod,includingthetransmissionlong-basemethod,thecavitymodeling,theintegralequationlawandsoon,andintroducedthemicrostripantennascircularpolarization'sprincipleandrealizesthemethodaswellasmicrostripantennas's
6、feedmethod.ThenAnSoftHfssinthecreationofasingle-fedcircularpolarizationmicrostripantennaanddouble-fedcircularpolarizationmicrostripantennaanddouble-fedcircularpolarizationmicrostripantenna,theanalysisoftheS11andVSWRparameters,todrawapattern.Inordertoach
7、ievecircularpolarization,theaxiscarriedontheoptimizationsimulation,toamoresatisfactoryresults.Keywords：microstripantenna；circularpolarization;axialratioII空军工程大学毕业论文（设计）目录摘要.................................................................................
8、.....................IABSTRACT...........................................................................................II目录...................................................................................................III第一
