寬頻與多頻帶是無線通信產業的趨勢，本論文主要設計應用於0.9 GHz (GSM)及2.4 GHz (ISM)頻帶接收機之雙頻低雜訊放大器。低雜訊放大器是一個重要的且不可或缺的元件，在整個系統中佔有相當的地位。
本論文由研究雙頻低雜訊放大器為主軸，並探討雙頻低雜訊放大器及其前後級電路結合之應用，如帶通濾波器、耦合器，甚至組合成
平衡式放大器等。為了提高無線收發機的效能，吾人使用步階阻抗諧振腔(SIR)的方式來設計雙頻帶通濾波器。
本論文共設計三種子電路，分別為雙頻低雜訊放大器、雙頻帶通濾波器及雙頻枝幹耦合器，再將雙頻低雜訊放大器及雙頻帶通濾波器
做結合，最後將雙頻低雜訊放大器與雙頻枝幹耦合器組合成雙頻平衡式放大器。
這些電路有幾項共同的目標就是以較低的成本、較小的尺寸、並利用易於製作之製程來做出高效能的元件。

致謝..... i
摘要..... ii
Abstract..... iii
圖目錄..... vii
表目錄.....x
第一章 緒論.....1
1-1 研究背景與動機.....1
1-2 GSM、ISM 與UNII 頻帶簡介.....2
1-2-1 GSM 頻帶.....2
1-2-2 ISM 頻帶.....3
1-2-3 UNII 頻帶.....4
1-3 內容概要.....4
第二章 低雜訊放大器.....6
2-1 放大器架構.....6
2-2 放大器直流偏壓.....8
2-3 電路設計考量.....11
2-3-1 雜訊指數.....11
2-3-2 1 dB 增益壓縮點.....14
2-3-3 交互調變失真.....16
2-3-4 定值雜訊度圓.....18
2-3-5 雜訊與增益同時匹配.....20
2-3-6 放大器穩定度考量.....21
第三章 雙頻低雜訊放大器設計.....24
3-1 雙頻低雜訊放大器簡介.....24
3-2 雙頻低雜訊放大器規格.....25
3-3 電晶體之偏壓點選擇.....26
3-4 電路架構.....27
3-5 匹配網路之設計.....28
3-6 模擬與實測結果.....30
第四章 雙頻低雜訊放大器與雙頻帶通濾波器設計.....37
4-1 帶通濾波器簡介.....37
4-2 雙頻帶通濾波器規格.....38
4-3 步階阻抗式諧振腔.....39
4-4 雙頻帶通濾波器電路基本架構.....43
4-5 濾波器彎折技術.....46
4-5-1 Bended and folded technique .....46
4-5-2 Folded and Forked SIR .....48
4-5-3 濾波器彎折之流程.....49
4-6 雙頻帶通濾波器之模擬與實測結果.....50
4-7 雙頻低雜訊放大器與雙頻帶通濾波器之模擬與實測結果.....53
第五章 雙頻帶平衡式放大器設計.....57
5-1 傳統枝幹耦合器.....58
5-2 雙頻帶枝幹耦合器.....62
5-3 雙頻枝幹耦合器規格.....64
5-4 雙頻帶枝幹耦合器模擬與實測結果.....65
5-5 平衡式放大器簡介.....69
5-6 雙頻平衡式放大器規格.....71
5-7 雙頻平衡式放大器模擬與實測結果.....71
第六章 結論.....77
參考文獻.....79
附錄.....82

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http://research.ncku.edu.tw/re/articles/c/20080321/1.html