教学单位：物理与电子信息工程学院学生学号：017301210009HUBEI ENGINEERING UNIVERSITY本科毕业论文（设计）题目小型化宽带圆极化微带天线的仿真与设计院系物理与电子信息工程学院专业电气工程及其自动化学生姓名学号指导教师2022年05月01日湖北工程学院毕业论文摘要微带天线的优点可以总结为五方面：第一，横剖面细小：第二，占用空间小：第三，质量值较小：第四，易于进行组阵：第五，易于共形。因为这些特点，微带天线性能优越，适用范围非常广。且最近几年，在无人机、GPS系统等基于电磁波通信技术的设备或系统得到了迅猛的发展，而微带天线与无线通信技术息息相关，因此，有关微带天线的研究已然成为无线通信领域的重要课题。本课题通过T型功分器顺序相差馈电形成馈电网络实现小型化；通过多层结构和支节匹配技术，拓展带宽：设计实现了一种工作在C波段的宽带小型化圆极化微带天线。仿真结果表明，该天线SWR<2的阻抗带宽达30%以上，3B轴比带宽均达到25%以上，在工作频带3.4~4.2GHz内，增益均在10dBi以上，天线尺关键词：小型化：圆极化：宽带：微带天线：仿真：设计湖北工程学院毕业论文ABSTRACTMicrostrip antenna has been widely used because of its low profile,small volume,light weight,easy array and easy conformal.In recent years,with the increasingdemand for wireless communication systems such as UAV,GPS,satellitecommunication and so on,broadband circularly polarized microstrip antenna hasbecome one of the research hotspots in the industry.In this paper,the feed network is miniaturized by sequential phase difference feedof T-type power divider;the bandwidth is expanded by multi-layer structure andbranch matching technology;and a broadband miniaturized circularly polarizedmicrostrip antenna working in C band is designed and implemented.The simulationresults show that the impedance bandwidth of the antenna VSWR 2 is 30%,and theaxial ratio bandwidth of 3dB is more than 25%.In the working band 3.4-4.2GHz,theKey Words:Miniaturization;Circular polarization;Broadband;Microstrip antenna;The simulation;Design