摘要WCDMA也称为宽带码分多址，是一种3GPP（第三代移动通信合作项目组）协议下的第三代移动通信系统，该系统设备的工作频带范围是1920MHz。2170MHz。由于WCDMA移动设备有便携性与灵活性方面的考虑，因此作为该设备重要组成部分的天线也必须具备体积小、重量轻、剖面低、易集成、结构稳定、制造成本低和馈电方式多样性的特点，而微带天线可以满足上述要求，因此得到了广泛的应用。但是微带天线又具有频带窄、效率低，工作在低频时体积过大的缺点，因此如何减小微带天线的体积，展宽其工作频带在近年来的研究中获得了广泛的关注。

本文首先介绍了移动通信的发展概况以及微带天线的性能及研究意义，在随后的章节里，介绍了微带天线的基本原理与结构，微带天线的分析方法。通过大量阅读中外文献资料，用HFSS仿真出PIFA天线。64798

毕业论文关键词  小型化；HFSS；WCDMA；电磁仿真；微带天线；PIFA

毕业设计说明书（论文）外文摘要

Title    Design of Novel Planar Inverted—F Antenna   used to WCDMA mobile terminal          

Abstract

WCDMA also known as Wideband Code Division Multiple Access，is a Third

generation mobile communication system under the agreement of 3GPP protoco1．The frequency range of the WCDMA system is from 1920MHz to 2170MHz．Considerating the requirements of portability and flexibility of WCDMA mobile devices．Therefore，as an important part of WCDMA mobile device，Antennas must have the advantages of small size，light weight，low profile，easy integration，structural stability，low manufacturing cost and the persity of feeding methods．The planar microstrip antenna meets the above requirements exactly，so it has wide range of applications．However,microstrip antenna has the deficiencies of Narrow band，low efficiency and the size is too large when working at low frequencies．So how to reduce the size of microstrip antennas，broaden its bandwidth received extensive attentions in recent years．

This paper describes the development of mobile communication profiles and microstrip antenna performance and research significance, in the subsequent chapters, introduces the basic principles and microstrip antenna structure, microstrip antenna method of analysis. Through a lot of reading foreign literature, the PIFA antenna using HFSS simulation.

Keywords: Miniaturization；HFSS；WCDMA；Electromagnetic Simulation；Microstrip antenna；PIFA

目录

目录

1、绪论 5

1.1移动通信发展概况 5

1.2微带天线的发展概况 5

2、微带天线的基本理论与分析方法 6

2．1微带天线辐射原理与馈电方法 6

2.1.1微带天线的辐射原理 6

2.1.2微带天线的常用馈电方法 7

2.2平面倒F结构天线 7

2.3 HFSS软件的介绍与概述 9

3、微带天线小型化技术 9

3.1微带天线的小型化技术 9

3.1.1采用曲流技术 9

3.1.2采用特殊介质衬底 10

3.1.3短路加载技术 10

4、用于WCDMA移动终端的平面倒F天线的研究与设计 11

4.1引言