它具有低剖面、重量轻。

本文首先就天线基础知识进行概述,从而得到尺码缩减的依据;最后利用ADS仿真软件优化工具对天线参数进行优化,从七十年代最初的宽频微带天线研制成开始,

宽频微带天线是在带有导体接地板的介质基片上贴加导体薄片而形成的天线。

最后对全文的工作进行了总结,并就列举出的五种馈电方式进行了比较;其次介绍宽频微带天线的普通分析方式,并且在微波天线这个广阔的领域里,宽频微带天线得到了广泛的研究和发展,同时介绍了宽频微带天线的辐射原理及宽频微带天线的馈电方式,可与各种载体共形;馈电网络可与天线印制在一起,双频段工作等优点,双极化,作为一个分立的整体而建立了自己的课题。

 

【关键词】宽频微带天线  宽频  ADS(Advanced Design System)  优化

 

 

ABSTRACT

    The broadband microstrip antenna is an antenna formed by attaching a conductor sheet to a dielectric substrate with a conductor ground plate. It has a low profile, light weight, can be conformal with a variety of carriers; feed network can be printed with the antenna, suitable for high-volume production with printed circuit technology; easy to achieve circular polarization, dual polarization, dual-band work And so on. From the beginning of the 1970s, the broadband microstrip antenna has been extensively researched and developed, and various applications have been obtained. In the broad field of microwave antenna, as a discrete whole And established their own subject.

    In this paper, the basic knowledge of the antenna is summarized, and the radiation principle of the broadband microstrip antenna and the feeding method of the broadband microstrip antenna are introduced. The five feeding methods are compared. Secondly, the broadband microstrip antenna This paper analyzes the design technology of multi-frequency microstrip patch antenna in detail, and introduces the simulation software ADS (Advanced Design System) which will be mentioned later. Then, based on the ADS software, Microstrip-coupled semi-circular dual-band microstrip patch antenna and rectangular dual-band microstrip patch antenna are simulated and designed, and the simulation results and radiation pattern of S11 parameters of two kinds of antennas are obtained and analyzed. And then use the ADS simulation software optimization tool to optimize the antenna parameters, and to optimize the parameters of the antenna.

Finally, the paper summarizes the work of the whole paper, puts forward the shortcomings and the need to improve the problem.

 

Key words: broadband microstrip antenna broadband ADS (Advanced Design System) optimization

 

 

 

 

 

目  录

 

第一章  绪论………………………………………………………………………………………1

第一节  课题分析………………………………………………………………………………1

  一、课题来源及研究目的、意义……………………………………………………………1

  二、国内外研究现状及分析…………………………………………………………………1

第二节  天线概述………………………………………………………………………………2

  一、引言………………………………………………………………………………………2

  二、天线的分类………………………………………………………………………………3

  三、天线辐射机理……………………………………………………………………………3

  四、天线特性参数……………………………………………………………………………5

第二章  宽频微带天线的基本原理………………………………………………………………6

  第一节  宽频微带天线概述……………………………………………………………………6

    一、宽频微带天线的发展……………………………………………………………………6

二、宽频微带天线的定义和结构……………………………………………………………6

三、宽频微带天线的优缺点…………………………………………………………………7

四、宽频微带天线辐射机理…………………………………………………………………8

  第二节  宽频微带天线的馈电方式……………………………………………………………10

    一、微带线馈电………………………………………………………………………………10

二、同轴线馈电………………………………………………………………………………11

三、临近耦合馈电……………………………………………………………………………11

四、口径耦合馈电……………………………………………………………………………12

五、共面波导馈电……………………………………………………………………………12

六、不同馈电方式的比较……………………………………………………………………12

  第三节  宽频微带天线的分析法………………………………………………………………13

    一、传输线模型法……………………………………………………………………………14

    二、空腔模型理论……………………………………………………………………………17

第三章  多频宽频微带天线及仿真工具…………………………………………………………21

  第一节  多频微带贴片天线……………………………………………………………………21

    一、多片法……………………………………………………………………………………21

二、单片多模法………………………………………………………………………………22

三、单片加载法………………………………………………………………………………22

  第二节  Momentum介绍………………………………………………………………………23

    一、ADS简介…………………………………………………………………………………23

二、Momentum概述…………………………………………………………………………23

三、Momentum运行过程……………………………………………………………………24

四、仿真实例…………………………………………………………………………………25

第四章  双频微带贴片天线的研究………………………………………………………………27

  第一节  双频微带贴片天线的介绍……………………………………………………………27

  第二节  双频微带贴片天线的结果分析………………………………………………………29

    一、天线S11参数……………………………………………………………………………29

二、天线方向图………………………………………………………………………………29

三、频带扩展…………………………………………………………………………………30

  第三节  优化后的双频天线……………………………………………………………………31

    一、改成矩形贴片天线………………………………………………………………………31

二、改变基板介质常数………………………………………………………………………33

三、优化馈线长度……………………………………………………………………………34

四、优化矩形天线上贴片长度………………………………………………………………35

五、优化矩形天线上下贴片长度……………………………………………………………36

六、小结………………………………………………………………………………………36

结    论……………………………………………………………………………………………37

致    谢……………………………………………………………………………………………38

参考文献……………………………………………………………………………………………39

,得到两种天线的S11参数仿真结果及辐射方向图,并进行分析比较,并详细分析了多频微带贴片天线的设计技术,并结合实例就后文将提及的仿真软件ADS(Advanced Design System)进行简单的介绍;然后利用ADS软件就基于提出的微带线耦合馈电的半圆双频微带贴片天线和矩形双频微带贴片天线进行仿真设计,并就参数优化后天线进行探讨。适用于用印刷电路技术大批量生产;便于实现圆极化,获得了多种应用,提出了不足之处和需要改进的问题

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