摘要随着无线通信的发展，设备的集成度越来越高，小型化圆极化微带天线的研究也不断深入。本文阐述了微带天线的基本理论知识，包括电参数、馈电方式、性能研究趋势等等，与此同时也介绍了微带天线小型化以及圆极化的基本概念，从概念入手，将理论知识运用起来，设计了满足自己设计要求的小型化双频天线。
    本文中设计了一种小型双频圆极化微带天线，工作的频点为1.268GHz和1.575GHz。该天线有两层介质，上层介质材料为TMM10i，下层则是陶瓷。天线的半径仅为12.7mm，厚度为11.27mm，实现了小型化的设计要求，同时，设计出来的天线也具有良好的天线性能。天线在1.268GHz和1.575GHz时的反射系数S11都小于-10dB，能够很好地接收天线信号。而且天线在低频点和高频点都具有良好的增益，分别为4.0dB和3.85dB。最后也对此次设计进行了总结，提出了需要改进的方面。19947
关键词  微带天线  小型化  圆极化  双频  
毕业设计说明书（论文）外文摘要
Title    Research of a compact circular polarization antenna
Abstract
With the development of wireless communications,equipment integration is being higher and higher.Also,the research of compact circular polarization microstrip antenna research is being further.This theis expounds the basic theory of microstrip antenna, including electrical parameters, feed mode, research trend and so on。At the same time,it also introduces the basic concept of miniaturization and circular polarization microstrip antenna. Based on the theory, a compact miniaturized dual-band antenna has been designed to meet the requirements.
This compact dual-band circular polarization microstrip antenna, is working at the 1.268 GHz and 1.575 GHz. The antenna has two layers of medium, the upper material is TMM10i, the lower is the dielectric ceramics. The radius of antenna is only 12.7 mm, thickness is 11.27 mm, to achieve the design requirements of the miniaturization. At the same time, the design of antenna can also has good performance. Both of the reflection coefficient(S11) of the designed antenna at 1.268 GHz and 1.575 GHz are less than -10 dB, so it can receive antenna signal well. The antenna also has good gain at both low frequency and high frequency, which is 4.0 dB and 3.85 dB respectively. Finally the design is summarized and the future work are also given.
Keywords  microstrip antenna  miniaturization  circular polarization
          dual-band
 目   次
1  绪论    1
1．1  国内外研究现状    1
1．2  几种常见的定位系统    2
1．3  课题研究的意义    3
1．4  Ansoft HFSS高频仿真软件的介绍    3
1．5  本文的主要工作与内容安排    4
2  微带天线的基本理论    4
2．1  微带线概述    4
2．2  微带天线的电参数    5
2．3  微带天线的馈电方式    6
2．4  微带线的性能    6
2．5  微带天线的研究趋势    7
2．6  多频微带天线的研究    8
3  微带天线的小型化    8
3．1  概述    8
3．2  几种常见的微带天线小型化方法    9
4  微带天线的圆极化    12
4．1  圆极化微带天线的性能    12
4．2  圆极化微带天线的馈电方式    13
5  小型化双频圆极化天线的设计与仿真测试    14 HFSS小型化圆极化天线研究+文献综述:http://www.youerw.com/tongxin/lunwen_11529.html