摘 要
微帶天線有固有的缺陷，即其阻抗帶寬較窄，典型的頻帶寬度從百分之零點(diǎn)幾到百分之幾，而微帶天線的窄頻帶特性成了限制其廣泛應(yīng)用的主要障礙，因此，展寬微帶天線的帶寬具有十分重要的意義。微帶天線具有體積小、重量輕、結(jié)構(gòu)穩(wěn)定、剖面低、饋電方式靈活、成本低、易與飛行器共行、易產(chǎn)生線極化波和圓極化波等優(yōu)點(diǎn)。本文首先簡(jiǎn)要介紹了微帶天線的基本原理，并利用相關(guān)原理對(duì)微帶天線進(jìn)行設(shè)計(jì)，闡述了設(shè)計(jì)要求。本設(shè)計(jì)重點(diǎn)介紹了微帶天線的設(shè)計(jì)與仿真過程，最后對(duì)仿真結(jié)果進(jìn)行了分析。

關(guān)鍵字：微帶線，微波天線，阻抗匹配，史密斯圓圖，天線效率

ABSTACT
The microstrip antennas has the volume small, the weight light, the structure stable, the section plane low, the feed way nimble, the cost low, is easy and the flight vehicle line, is altogether easy to produce the plan polarized wave and and so on the merit. This article first briefly introduced the microstrip antennas basic principle, and carries on the design using the correlation principle to the microstrip antennas, elaborated the design request. This design introduced with emphasis the microstrip antennas design and the simulation process, finally have carried on the analysis to the simulation result.
Key Words: Microstrip, microwave antenna, impedance matching, smith chart, antenna efficiency.

目錄

1緒論
2設(shè)計(jì)原理及方法
2.1微帶天線簡(jiǎn)介
2.2微帶天線的工作原理
2.3微帶天線的分析方法
2.4矩形貼片微帶天線的結(jié)構(gòu)和設(shè)計(jì)要求
2.4.1結(jié)構(gòu)和特點(diǎn)
2.4.2矩形微帶天線單元的主要特性
2.4.3其他形式的微帶天線
2.4.4設(shè)計(jì)要求
2.4.5天線的Q值和效率
2.4.6微帶天線的帶寬及改進(jìn)措施
3.用ADS軟件設(shè)計(jì)微帶天線的分析
4總 結(jié)
參考文獻(xiàn)
致 謝