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研究生:吳郁信
研究生(外文):Yu-Shin Wu
論文名稱:寬頻低雜訊放大器設計與實現
論文名稱(外文):Design and Realization of Broadband Low Noise Amplifier
指導教授:田慶誠田慶誠引用關係
指導教授(外文):Ching-Cheng Tien
學位類別:碩士
校院名稱:中華大學
系所名稱:電機工程學系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:中文
論文頁數:82
中文關鍵詞:射頻寬頻低雜訊放大器匹配補償
外文關鍵詞:RFbroadbandlow noise amplifierLNAmis-match compensation
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本論文採用mis-match匹配補償方式設計寬頻放大器,再使用軟體最佳化功能,改善增益平整度及反射係數,使電路有較佳的表現。
電路設計及模擬部分,應用低雜訊放大器基本理論,混合寬頻放大電路基本原理,從基本偏壓電路選取、RF choke設計,接著匹配網路設計,使整個頻帶內的增益,能維持在一定增益,兼顧增益平坦度、反射係數及雜訊度的表現。
電路實做方面,使用Power PCB為佈局軟體,利用雕刻機實際製作出成品,量測並比對模擬與實際的差異性,並加以討論。

This thesis adopts the method of mis-match compensation to design broadband low noise amplifier and employs efficient optimizing function in software to improve the gain level, flatness and noise figure.
For the parts of circuit designing and simulation in this research, we mainly apply basic theory of low noise amplifier, and broadband amplifier. The proper DC bias circuit, RF choke and matching network are selected to obtain stable gain in whole frequency range as so as the return loss and noise figure.
In addition, the realization of amplifier demo circuit use the Power PCB as layout software and utilize carving LPKF milling machine for PCB production process. Finally, we compared the measurement data to the simulation results and obtained the very good match performance. The detailed discussion and further improvement could be found in the final chapter.

中文摘要 ……………………………………………………………i
英文摘要 ……………………………………………………………ii
誌謝 …………………………………………………………………iii
目錄 …………………………………………………………………iv
圖目錄 ………………………………………………………………vii
表目錄 ………………………………………………………………xi
第一章 緒論 ………………………………………………………1
1-1 研究動機 ………………………………………………………1
1-2 研究背景 ………………………………………………………1
1-3 研究方法與流程 ………………………………………………2
1-4 章節簡介 ………………………………………………………2
第二章 低雜訊放大器設計基本理論………………………………4
2-1 放大器設計簡介 ………………………………………………4
2-2 電晶體偏壓設計 ………………………………………………4
2-3 穩定性分析 ……………………………………………………5
2-3-1 無條件穩定的判斷法 ………………………………………6
2-3-2 無條件穩定的圖解法 ………………………………………7
2-3-3 常用於穩定主動元件的電路設計 …………………………10
2-4 功率增益 ………………………………………………………11
2-4-1 功率增益數學表示法 ………………………………………11
2-4-2 定值增益圓 …………………………………………………12
2-5 雜訊 ……………………………………………………………13
2-5-1 雜訊簡介 ……………………………………………………13
2-5-2 電路的雜訊指數 ……………………………………………14
2-5-3 定值雜訊圓 …………………………………………………17
2-6 單向性特性 ……………………………………………………19
2-6-1 單向性判定 …………………………………………………19
2-6-2 單向性元件的定值增益圓 …………………………………20
2-7 寬頻帶電路設計 ………………………………………………22
第三章 電路設計及模擬 …………………………………………24
3-1 電晶體基本特性 ………………………………………………24
3-2 規格選取 ………………………………………………………27
3-3 電路設計過程 …………………………………………………29
第四章 電路製作與量測 …………………………………………42
4-1 被動元件實際等效模型 ………………………………………42
4-1-1 電阻 …………………………………………………………42
4-1-2 電感 …………………………………………………………43
4-1-3 電容 …………………………………………………………44
4-1-4 實際模擬 ……………………………………………………44
4-2 電路實做 ………………………………………………………48
4-3 電路量測 ………………………………………………………48
4-3-1 S參數量測……………………………………………………49
4-3-2 雜訊度量測 …………………………………………………59
4-3-3 P1dB及PIP3量測 ……………………………………………60
4-4 模擬與量測差異探討 …………………………………………63
4-4-1 元件探討 ……………………………………………………63
4-4-2 傳輸線探討 …………………………………………………74
第五章 結論 ………………………………………………………82
參考文獻 ……………………………………………………………83

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