臺灣博碩士論文加值系統

本論文設計三種不同架構的雙頻增益放大器。第一種電路架構使用鏡像參數理論設計雙頻帶阻抗匹配電路，結合電晶體形成兩級串接架構，其中輸入與級間匹配電路皆做雙頻阻抗轉換。第二種架構法是採用LC諧振架構，造成雙頻帶諧振之效果。第三種是疊接式主動回授架構，結合傳輸零點，達到雙頻帶放大效果。論文中雙頻帶放大器是針對IEEE 802.11a/b/g無線區域網路應用而設計，以驗證提出三種架構的正確性，其第一頻帶為2400-2483.5 MHz，第二頻帶之頻段為5150-5350 MHz。論文中將討論三種雙頻放大器之設計方法，並比較量測與模擬結果比較。

The thesis proposes three methods for the design of dual-band amplifiers. The first method employs the image parameter theory to have impedance match at two separated frequencies. The second method uses the LC-resonator network to generate the dual-band impedance match effect, while the third method utilizes the bandstop parallel feedback to achieve the dual-band match effect. The dual-band amplifiers, designed based on these methods, are for IEEE 802.11a/b/g wireless LAN applications. The measured results show good agreement with the simulation, which confirm proposed methods.

第一章 緒論 1
1.1 研究動機與目的 1
1.2 文獻探討 1
1.3 論文內容綱要 2
第二章 鏡像參數濾波器理論分析 3
2.1鏡像參數理論 3
2.2鏡像參數理論之定k型原型結構 7
2.3鏡像參數理論之m型原型結構 18
2.4鏡像參數理論之複合型(composite)結構 22
2.5放大器之設計理論 26
2.5.1多級放大電路 26
2.5.2放大器之設計 28
2.5.3小信號放大器設計流程 29
第三章 利用鏡像參數理論設計並存式雙頻帶增益放大器 30
3.1 雙頻帶鏡像參數濾波器設計 30
3.2 雙頻帶放大器設計 37
3.2.1 偏壓電路設計 38
3.2.2 匹配網路設計 39
3.2.2 模擬與量測 45
第四章 切換式可調增益之雙頻帶放大器 50
4.1 利用LC諧振設計雙頻帶濾波器 50
4.2 雙頻帶增益放大器設計 55
4.3 切換式雙頻帶放大器之設計 59
4.3.1 電晶體Vctrl為ON之狀態 62
4.3.2 電晶體Vctrl為OFF之狀態 64
4.3.3 電晶體Vctrl為-1(OFF) ~ 0V(ON)之可調狀態 67
第五章 可調增益之HBT雙頻帶低雜訊放大器晶片 71
5.1 放大器設計架構分析 71
5.2 模擬與量測 74
第六章 結論 80
參考文獻 81
附錄A 83

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