| 姓名 |
李忠穎(Chung-Ying Lee)
查詢紙本館藏 |
畢業系所 |
通訊工程學系在職專班 |
| 論文名稱 |
應用於凱氏天線X頻段之低雜訊放大器設計
(The Study on the X-band Low Noise Amplifier Design for Cassegrain Antenna.)
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| 相關論文 | |
| 檔案 |
 [Endnote RIS 格式]
[Bibtex 格式]
 [相關文章]  [文章引用]  [完整記錄]  [館藏目錄]  至系統瀏覽論文 ( 永不開放)
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| 摘要(中) |
此論文設計一個適用於凱氏衛星天線的低雜訊放大器(LNA)，工作區域為X頻段7GHz ~ 9GHz，其中採用Agilant公司的ADS(Advanced Design System)軟體進行模擬。主要模擬的重點在於LNA放大電路優化及輸入輸出阻抗匹配、雜訊指數、功率增益等，藉由調整其中電路元件參數，來設計出系統最佳效能。由模擬結果顯示此LNA在全頻段具有至少13dB功率增益、雜訊指數小於3dB，輸出返回損失小於-17dB的低雜訊放大器。
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| 摘要(英) |
A low noise amplifier(LNA) suitable for Cassegrain antenna applications is designed in this thesis. Which works in X band 7GHz ~ 9GHz. Here we adopt as Advanced Design System(ADS) published by Agilant corp. for simulation. The Main simulation points are LNA circuit optimization, input/output impedance matching, noise figure, power gain. Through adjusting the component parameter of the LNA circuit, the system optimization can be determined. Simulation results show that the LNA at X band is characterized by at least 13dB of power gain, less than 3dB of noise figure, and output return lose less than -17dB.
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| 關鍵字(中) |
★ 低雜訊放大器
★ 凱氏天線
★ X頻段 |
關鍵字(英) |
★ X band
★ Low Noise Amplifier
★ Cassegrain antenna |
| 論文目次 |
第一章 緒論 1
1.1前言 1
1.2研究動機與目的 2
1.3論文架構 3
第二章 天線理論 4
2.1雜訊（Noise） 4
2.1.1 熱雜訊（Thermal Noise） 4
2.1.2 閃爍雜訊（Flicker Noise） 5
2.1.3 散射雜訊（Shot Noise） 6
2.1.4 雜訊指數(Noise Figure) 7
2.1.5 雜訊溫度（Noise Temperature） 9
2.2 雜訊指數圓(Noise Figure Circles) 11
2.3 定值增益圓 13
2.4 放大器穩定度 16
2.5 穩定度圓 18
2.6 增益 24
2.7 1dB增益壓縮點 27
第三章 衛星通訊及凱氏天線系統 28
3.1 電磁理論 28
3.2 衛星通訊概要 30
3.3 凱氏天線特性 32
3.4 低雜訊放大器 35
第四章 X頻段低雜訊放大器設計 38
4.1 簡介 38
4.2 低雜訊放大器設計 39
4.2.1 輸入阻抗匹配 40
4.2.2 輸出阻抗匹配 44
4.2.3 連接匹配電路設計 48
4.3 電路模擬與分析 50
4.3.1 穩定度及靈敏度分析 50
4.3.2 電路良率分析 56
第五章 結論與未來展望 66
5.1 結論 66
5.2 未來展望 68
參考文獻 69
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| 參考文獻 |
[1]http://www.wikipedia.org/
[2]http://www.agilent.com
[3]http://www.2cm.com.tw/index.asp
[4]http://www.elva-1.com/products/microwave/dual_reflect.html
[5]Yang Wei-ming, “The Design of 3.6GHz.4.2GHz Low Noise Amplifier” IEEE 2007 International Symposium on Microwave, Antenna, Propagation, and EMC Technologies For Wireless Communications
[6]Kucera, J.J.; Lott, U. “Low-power silicon BJT LNA for 1.9 GHz” IEEE Microwave and Guided Wave Letters Mar 1998
[7] Eppich, R.D.; Heston, D.D. “A monolithic variable gain Ku-band LNA” IEEE MTT-S International Microwave Symposium Digest Jun 1989
[8] Arthur Nieuwoudt , Tamer Ragheb , Hamid Nejati , Yehia Massoud “Increasing Manufacturing Yield for Wideband RF CMOS LNAs in the Presence of Process Variations” 8th International Symposium on Quality Electronic Design (ISQED'07) March 2007
[9] A. Nieuwoudt , T. Ragheb , Y. Massoud “Hierarchical Optimization Methodology for Wideband Low Noise Amplifiers” EDA Technofair Design Automation Conference Asia and South Pacific January 2007
[10] Virgínia Helena Varotto Baroncini , Oscar da Costa Gouveia-Filho “Design of RF CMOS low noise amplifiers using a current based MOSFET model” Proceedings of the 17th symposium on Integrated circuits and system design September 2004
[11] Ismail, A. Abidi, A.A. “A 3-10-GHz low-noise amplifier with wideband LC-ladder matching network” IEEE Journal of Solid-State Circuits Dec. 2004
[12] Jongsoo Lee Cressler, J.D. “A 3-10 GHz SiGe resistive feedback low noise amplifier for UWB applications” Radio Frequency integrated Circuits (RFIC) Symposium June 2005
[13] Bo Shi “Design of a SiGe low-noise amplifier for 3.1-10.6 GHz ultra-wideband radio” Circuits and Systems, 2004. ISCAS '04 May 2004
[14] Simon Haykin “Communication Systems” 4nd edition WILEY
[15]Richard J. Mohr “Mohr on Receiver Noise Characterization, Insights & Surprises” January 2006
[16] David M. Pozar, ”Microwave Engineering”, 2nd edition, John Wiley & Sons, U.S.A. 1998.
[17] 黃進芳 “微波工程” 五南圖書 ISBN 957-11-3813-4
[18] 白光弘 “衛星通訊” 東華書局 ISBN 957-636-409-4(557)
[19] 市川裕一、青木勝 “高頻電路設計 GHz時代の高周波回路設計” 全華科技
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| 指導教授 |
蔡木金、林嘉慶
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審核日期 |
2009-7-6 |
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