口径耦合宽频圆极化天线设计..doc

编号： 　 题 目：圆极化微带天线设计 学　　院： 专 业： 学生姓名： 学 号： 指导教师单位： 姓 名： 职 称： 题目类型： 理论研究 实验研究 √工程设计 工程技术研究 软件开发 2012年月日 本文在第五章讨论小型圆极化天线的设计。运用了前面章节所述的基本理论，讨论了三种可以实现圆极化微带天线的方法，重点讨论了口径耦合馈电的圆极化微带天线的设计，通过对三种方法的比较，由于口径耦合馈电的方式较其他两种更有优势，最后制作了口径耦合馈电的天线实物，通过实际测量，成功的实现了2.9GHZ到3.3GHZ的带宽，并且在带宽范围内实现了较好的驻波比特性和辐射特性。 关键词：圆极化；宽频带；微带天线；口径耦合 Abstract This article first introduces several theories of microstrip antenna analysis method, the transmission line model and cavity model theory and integral equation method. Then the third chapter discusses the theory of the circular polarization microstrip antenna, the nature of the circular polarized wave, and how to implement circular polarization, focus on single point feed are discussed, the two point circular polarized antenna feeder. The fourth chapter discusses the broadband microstrip antenna and miniaturization, tells the story of a variety of ways to realize miniaturization and wide band. This article discussed in chapter 5 small circular polarized antenna design. Utilizing the basic theory, mentioned in the previous section discussed the three method can realize the circular polarization microstrip antenna, of aperture coupled feeding is mainly discussed in the design of the circular polarization microstrip antenna, by comparing three methods, Due to the aperture coupled feeding methods have more advantages than other two, and finally make the antenna aperture coupled feeding material, through the actual measurement, the successful implementation of the 2.9 GHZ to 3.3 GHZ bandwidth, and within the scope of the bandwidth achieved better standing wave ratio and radiation characteristics. Key words：Circular polarization Broad band; Microstrip antenna; Aperture coupling 目 录 第一章 绪论 1 1.1 天线简介 1 1.1.1 天线的出现及发展 1 1.1.2 天线的基本概念 1 1.1.3 天线的基本电参数 1 第二章 微带天线 4 2.1 微带天线的出现及发