臺灣博碩士論文加值系統

本篇論文使用2.4GHz ISM頻段兩級式AB類功率放大器WS9901，並操作在E類放大器架構，藉以提升功率放大器整體效率的設計方法。在設計方面，採用WIN 2um HBT製程參數將兩級式AB類功率放大器模組化，再利用模組電路分析設計，採用E類放大架構是否適合於兩級式AB類功率放大器上，並也可借由模組設計出最佳的電路，避免掉功率放大器損壞的可能性，間接地改善整體效率。模擬分析完成後，實作部份採用WS9901規格書中佈局圖製作電路板，修改成E類放大架構。採用的架構是屬於一般常見的並聯電容/串聯共振式，這是因為此架構較能配合功率放大器本身的寄生電感及電容，使外部電路具有元件數少及易於設計的優點。
經採用E類放大架構之量測結果顯示，工作在2.4GHz頻段時，原本35%的功率增加效率(PAE)可藉由所提出的電路架構提升至45%，但相對的最大輸出功率表現由原23dBm變小至22dBm。

This thesis presents an attempt method using a 2.4GHz ISM band of two-stage class-AB power amplifier (PA) WS9901 configured as class-E operation in order to increase the efficiency of the PA. The two-stage class-AB PA (WS9901) can be simulated and modeled using WIN 2um HBT process. The simulated PA module is used to analyze the class-E operation and to improve the efficiency. The implementation of the PCB board adopts a layout circuit from the data sheet. The desired class-E amplifier is slightly modified by using this PCB board. The proposed class-E amplifier adopts the parallel capacitance / series resonator fabrication in order be easily applied onto the parasitic capacitance and inductance in the PA. The advantages of this method include both fewer components and simpler design.
The measurement results show that the class-E PA increases the power added efficiency (PAE) from 35% to 45% in 2.4GHz frequency band, but will decrease the maximum output power from 23dBm to 22dBm.

目錄
誌謝 I
摘要 II
Abstract III
目錄 IV
圖目錄 VI
表目錄 VIII
第1章 緒 論 1
1-1. 前言 1
1-2. 研究動機 1
1-3. 研究方法與步驟 2
1-4. 論文章節架構 3
第2章 微波電路基本理論 4
2-1. 散射參數 4
2-2. 功率增益 6
2-3. 穩定性 8
2-4. 效率 10
2-5. 雜訊 11
2-6. 失真 13
2-6-1. 諧波失真 13
2-6-2. 互調失真 13
第3章 功率放大器介紹 16
3-1. 功率放大器的種類 16
3-1-1. 電流源型(線性)放大器 16
3-1-2. 開關型(非線性)放大器 19
3-2. E類功率放大器 19
3-2-1. E類放大器基本原理及分析 20
3-2-2. E類功率放大器的負載網路 29
第4章 功率放大器分析及設計製作 34
4-1. 放大器分析及模組化 34
4-2. E類放大器分析模擬及製作 45
4-3. 量測結果 48
第5章 結論與未來研究方向 53
5-1. 結論 53
5-2. 未來研究方向 53
參考文獻 54

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