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研究生:張原輔
研究生(外文):Yuan-Fu Chang
論文名稱:設計2.4/5.2GHz雙頻低雜訊放大器應用於802.11a/b之研究
論文名稱(外文):A Study on Design Dual-Band 2.4/5.2GHz Low Noise Amplifier Apply for Application of 802.11a/b
指導教授:陳世志陳世志引用關係
指導教授(外文):Shih-Chih Chen
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電子與資訊工程研究所碩士班
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:2004
畢業學年度:92
語文別:中文
論文頁數:58
中文關鍵詞:共時低雜訊放大器寬頻放大器帶拒濾波器
外文關鍵詞:concurrent low noise amplifierwideband amplifiernotch filter
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本論文是以 TSMC 0.35μm SiGe HBT 製程的RF model來研製應用於802.11a/b 的無線區域網路上之低雜訊放大器。
因為訊號從天線進來後,立即要透過低雜訊放大器來放大,其將決定了整體接收機的雜訊指數和輸入的電壓駐波比,直接影響了訊號的,所以低雜訊放大器是通訊系統中相當重要的前級零組件。此電路是共時(concurrent)低雜訊放大器,它是一個結合了寬頻放大器和帶拒濾波器的架構,可達多頻操作的目的。在消耗功率17mW下,經由模擬後,在2.4/5.2 GHz 時分別得到雜訊指數為4.9/4.5
dB,功率增益為22.5/22.1dB,輸入返回損耗為20.9/18.9dB,輸出返回損耗為22.9/29.3dB,隔絕度為53.5/42.5dB,P1dB為-15.6/-16.9dBm。由於晶片還在製作中,故只有模擬結果。
This thesis used TSMC 0.35μm SiGe HBTprocess’s RF model to apply to the low-noise amplifier which on the 802.11a/b Wireless LAN (WLAN).

The low-noise amplifier became the quite important implementation of front-end circuit in communicate system, that’s because the signal transmitted from antenna and amplified through the low-noise amplifier immediately. Besides, the low-noise amplifier controls the whole radio’s noise figure and the input VSWR. This circuit is a concurrent low noise amplifier, it combines an wideband amplifier and a notch filter to realize a multi-band amplifier. However, under the power dissipation 17mW, at the frequency 2.4/5.2GHz, respectively, the simulated noise figure was 4.9/4.5dB, the power gain was 22.5/22.1dB, the input return dissipation was 20.9/18.9dB, the output return dissipation was 22.9/29.3dB, the isolation was 53.5/42.5dB, P1dB was -15.6/-16.9dBm.
目 錄
中文摘要.................i
英文摘要.................ii
誌謝.................iii
目錄.................iv
表目錄.................vii
圖目錄.................viii
第一章、緒 論
1-1研究動機.................1
1-2無線區域網路簡介.........1
第二章、接收機射頻架構討論
2-1簡介.................6
2-2接收機架構.................7
2-2-1外差式接收器.................7
2-2-2超外差接收機.................8
2-2-3直接降頻接收機架構.................10
2-2-4雙降頻式超外差接收機.................12
2-3射頻前端接收器效能參數.................13
2-4阻抗匹配網路.................15
2-5功率增益.................16
2-6同時共軛匹配---雙向性情況….................19
2-7雜訊.................19
2-7-1熱雜訊.................19
2-7-2散粒雜訊.................20
2-7-3閃爍雜訊.................21
2-7-4爆衝雜訊.................22
2-7-5 BJT中的雜訊.................22
2-8雙埠網路之雜訊.................23
2-9等雜訊指數圓.................26
2-10穩定度的考慮.................26
2-11線性度的考量.................31
2-11-1 1dB增益壓縮點.................31
2-11-2第三階交會點.................33
第三章、雙頻低雜訊放大器
3-1多頻接收器的介紹與比較.................35
3-2實現雙頻低雜訊放大器的理論.................38
3-2-1 Gain Boosting.................39
3-2-2 Feedback.................42
3-2-3帶拒濾波器的實現理論.................43
第四章、模擬結果
4-1設計流程.................47
4-2設計步驟.................48
4-2-1對主動元件DC curve考量.................48
4-2-2先決定Notch濾波器共振頻率.................48
4-2-3寬頻放大器.................49
4-2-4最終電路架構.................49
4-2-5模擬結果.................51
第五章、結語
參考文獻.................84
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