射频圆极化微带天线设计案例.doc

射频圆极化微带天线设计 摘 要 天线作为无线通信最为重要的部分长久以来都受到科研人员的重视以及迅速改造发展。如今，微带天线因其自身的质量小，形状易改变而与设备共形等优势在通信领域应用极为广泛。天线的种类多样，极化方式大致分为线极化与圆极化两种，在天线出现的初期，由于技术层面的限制，线极化天线的应用极为广泛。但由于科技的发展和人们对信号的愈来愈严苛的要求导致线极化天线与应用层面的矛盾越发凸显。由于圆极化天线的方向性，旋向相同接收性和抗干扰性较强，因此现代圆极化天线的应用成为当今天线的主流。本文介绍圆极化天线的性质和缺点以及对未来的展望和改进。 关键词：圆极化天线，抗干扰，性质 Designing of Rf circular polarization microstrip antenna ABSTRACT As the most important part of the wireless communication antennas has long been brought to the attention of the researchers and rapid development. Today, the quality of the microstrip antenna with its small, easy to change shape and advantages, such as equipment conformal is widely applied in the field of communications. Diversity of antenna, polarized way is roughly divided into two kinds of linear polarization and circular polarization, at the beginning of the antenna to appear, as a result of the limitation of technological level, the application of linear polarization antenna is very extensive. But as a result of the development of science and technology and peoples more and more stringent requirements of the signal lead to linear polarization antenna and the application layer of the contradictions increasingly prominent. As a result of the circular polarization antenna directivity, rotate to receive same sex and anti-interference performance is stronger, so the application of modern circular polarized antenna become the mainstream of todays antenna. In this paper, the properties of circular polarization antenna and disadvantages as well as the vision of the future and improve. Keywords: Circular Polarization Antenna, Anti-interference, Properties 目 录 第一章 本论文的研究背景及研究意义 1 1.1天线发展历史 1 1.2微带微带圆极化天线应用的意义 2 1.3 国内外使用背景及其发展趋势 2 1.4本文内容安排 3 第二章 理论及技术 4 2.1电基本振子 4 2.2磁基本振子 5 2.3天线基本原理及其分类 5 2.3.1天线辐射电磁波的原理 6 2.3.2天线的用途分类及各项参数 7 2.4本章小结 9 第三章 微带天线基本知识 10 3.1微带线天线简介 10 3.1.1微带天线的工作方式 10 3.1.2双频微带天线 11 3.2微带天线的分析方法 12 3.2.1传输线模型 12 3.2.2空腔模型 12 3.3侧馈矩形微带天线设计和同轴馈电矩形微带天线设计 12 3.4HFSS简介 13 第四章 圆极化微带天线 15 4.1圆极化波的性质 15 4.