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摘要移动通信的迅猛发展，对应用于手机的天线提出了小型化、宽频带、多频段工作等要求。而平面倒F天线(Planar Inverted-F Antenna, PIFA)因其具有体积小、重量轻、剖面低、可内置、且易于加工等突出的结果特点以及能实现宽频带和多频段的特性而在手机中得到了广泛的应用。随着不同用途的需求，对手机天线性能的要求越来越高，准确分析PIFA天线的物理尺寸和性能参数的关系有越来越重要的作用。对此，本文利用Ansoft HFSS仿真软件研究了初始设定物理尺寸下PIFA天线的各个性能指标，并分析相关参数对天线性能影响。
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论文论述了天线的基本概念和参数指标，讨论了手机PIFA天线的基本结构和实现多频段的设计方法。在了解软件Ansoft HFSS的天线仿真功能和仿真流程的基础上，对一种双频（GSM/DCS）PIFA天线的设计方案进行了仿真分析。最后，讨论了该天线的高度H和贴片突出的长度对天线性能的影响。21019
本文的工作，不仅对手机PIFA天线的工程设计提出了一种有效模型结构，而且证实了使用Ansoft HFSS仿真软件的天线仿真功能，能够在其它更为复杂的天线工程设计中，进行更多的方案比较并缩短设计周期，降低研制成本。
毕业论文关键词：PIFA，手机天线，HFSS，双频，仿真分析
Abstract
With the rapid development of mobile communication, properties of miniaturization, broadband and multi-frequency for antennas in mobile phone are demanded. And planar inverted-F antenna (PIFA) coming out during these years has been rapidly and widely adopted because it has the structural advantages of small size, light weight, low profile, internally equipped, easily fabricated and mounted on the carrier. But, with the increased demands of antenna quality for different purposes, how to analyze the physical sizes and performance parameters of mobile phone antenna will be more and more important. So, this thesis used Ansoft HFSS software to do research about various performance indicators of PIFA in the initial settings of physical sizes, and analyze the related parameters for the influence on the performance of the antenna.
The thesis introduced basic concepts and parameters of antenna, and discussed the basic structure and design of multi-band about the PIFA antennas of mobile phone. Be familiar with simulation function and simulation process of Ansoft HFSS software, did simulation analysis about the design of a dual-band(GSM/DCS) PIFA antenna. Lastly, the proposed antenna is experimentally studied, and effects of the height of the antenna and the extended top-patch portion on the performance of the antenna are discussed.
The work of this thesis, not only provided an effective model structure of engineering optimized design of PIFA antenna, but also confirmed that functional simulation of Ansoft HFSS software can do optimization on design in more complex antenna projects, compared to more programs, it will ensure the precision and reduce the design cost. Finally, according to the antenna structure making physical model, through the test and continuous optimization, to obtain the result is consistent with simulation results and can be used as mobile phone in practical application.
Key words：PIFA, Mobile Phone Antenna, HFSS, dual frequency, Simulation analysis
目录
1 绪论 1
1.1 课题研究背景及意义 1
1.2 手机天线的研究历史和发展现状 1
1.3 本论文的主要工作和内容 3
2 手机天线基本理论知识 3
2.1 手机天线的辐射电磁波原理 3
2.2 手机天线特性的主要参数 4
2.2.1 频带宽度 4
2.2.2 输入阻抗 5
2.2.3 效率 5
2.2.4 方向图 6
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