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毕业论文-基于HFSS的双层贴片基站天线单元振子的设计，36页，19988字符
摘要
本设计是基于Ansoft HFSS软件设计的一款可以满足移动TD-SCDMA 3G基站天线要求的双层贴片天线振子。本设计首先应用微带贴片天线理论对双层贴片天线进行理论分析,设计出了理论上可行的贴片天线振子。然后再利用HFSS进行建模，对所建的模型进行仿真，通过仿真的结果对天线振子贴片的尺寸、上下层贴片的距离、下层贴片和反射板间的距离、天线的馈电方式等进行对比和优化，从而设计出了电性能较好的微带贴片天线振子。由于TD-SCDMA的频带范围是1880-1920MHz频段以及2010-2025MHz频段，所以本设计的天线振子的谐振频率是1.930GHz，天线的带宽为0.180GHz。同时天线的方向性较强，天线的前后比较高，天线的波瓣宽度只有大约 。同时本天线振子还具有在需要的带宽内，驻波低，增益高，馈电方式结构简单，成本较低，制作工艺简单等优点。

关键词：Ansoft HFSS; 微带贴片天线； 仿真计算

Abstract
The design is based on the design of software Ansoft HFSS which can satisfy the TD-SCDMA 3G mobile base station antennas patch antennas requirements of double oscillator. This design is first applied to patch antennas microstrip antenna theory of double-layer patch is analyzed theoretically, the theory of the feasible design vibrator patch antennas. Then reuse HFSS and modeling and simulation model is built, and the results of the simulation of antenna vibrator patch size, in the distance, the patch patch distance between the plate and reflection of the antenna, feed mode and compares the optimized design of electric, thereby better microstrip patch antennas oscillator. Because of TD-SCDMA frequency range is 1880-1920MHz and 2010-2025MHz frequency band, and the design of antenna design so vibrator resonant frequency is 1.930 GHz, while the bandwidth of the antenna for 0.180 GHz. While the directional antenna is stronger, the antenna is taller, and the width of the double wave antenna is only about. At the same time the antenna vibrator has need of bandwidth, in low and high gain standing wave, feed mode of simple structure, low cost, simple production process etc.

Keyword：Ansoft HFSS; Microstrip patch antennas；Simulation calculation

目 录
摘要 1
Abstract 2
第一章 前言 4
1.1 HFSS简介 5
1.2 天线的简介 6
1.2.1 天线的发展历史 6
1.2.2 天线未来的发展趋势 8
1.2.3 天线的分类及应用 10
第二章 天线的基本理论 13
2.1天线的基本参数 13
2.2贴片天线的理论分析 17
第三章 应用HFSS设计双层贴片天线振子 22
3.1双层贴片天线振子的结构 22
3.2天线设计过程中的参数优化 23
3.2.1下层贴片和反射板间的距离的优化 23
3.2.2上下两层贴片间的距离的优化 25
3.2.3 双层贴片和单层贴片性能的比较 26
3.3最终设计成型的天线的参数及仿真结果 27
第四章 总结 32
致谢 34
参考文献 35