臺灣博碩士論文加值系統

功率放大器(Power Amplifier, PA)對於系統發射端扮演著重要的角色，它不只提供了無線傳輸時所需要的功率，也關係著整個發射端的線性度與效率。
隨著無線通訊的迅速發展，再加上許多研究報告陸續被發表，我們可以發現功率放大器的設計趨勢已不再只是單單考慮晶體與功率放大器本身的電路特性，為了因應系統的要求，常可發現利用額外的電路系統或是數位訊號處理的方式，來補償功率放大器的線性度並增加其附加工作效率。其中，線性度的好壞直接影響了所發射的訊號品質，而效率則是放大器是否耗電的指標。現實中，線性度與效率並無法同時達到最佳，所以在這二者之中如何取捨就成為了現今在設計功率放大器時最重要的課題。
本論文所設計之兩級線性化功率放大器特性如下：輸出功率為22.38 dBm，增益為21.8 dB，功率附加效率為32.2 %。

Power amplifier is the key component for transmitter of system. It not only provides necessary power for wireless communication but also relate with linearity and efficiency.
Because of wireless communication develop quickly and many research reports have published. Power amplifier is not only focused in electronic property. In order to conform system request, many people use extra system or DSP(digital signal process) to improve linearity and efficiency. Good linearity and efficiency affect signal quality and power consumption, respectively. But in real life, linearity and efficiency can not coexist simultaneously. Therefore, how to choose the trade off between linearity and efficiency is the most important topic in the present day.
A two-stage power amplifier with on chip linearizer is designed in this thesis. Its property is listed as follows: Output power is 22.38 dBm, power gain is 21.8 dB, and power added efficiency is 32.2 %.

摘 要
ABSTRACT
誌 謝
目 次
表目錄
圖目錄
第一章 前言
1.1 研究動機
1.2 發展現況
1.3 製程介紹
1.4 研究方法及步驟
第二章 系統架構簡介
2.1 兩階段升頻發射機
2.2 OFFSET PLL發射機
2.3 直接升頻發射機
2.4 極化發射機
第三章 功率放大器基礎概念
3.1 基本理論
3.1.1 S參數
3.1.2 反射係數
3.1.3 匹配網路
3.2 參數介紹
3.3 放大器偏壓分類
3.4 兩級放大器設計
第四章 線性化技術介紹
4.1 功率降低線性化
4.2 順向回饋式線性化
4.3 前置失真線性化
4.4 二極體線性器
4.5 卡迪生回授線性化
4.6 多核帝放大器
4.7 EE&R
4.8 LINC
第五章 二極體線性化功率放大器電路設計
5.1 電路架構介紹
5.2 設計流程
5.3 模擬結果
第六章 結論
參考文獻
附錄 A

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