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研究生:洪堂欽
論文名稱:低雜訊放大器及一維電磁能隙濾波器之電路設計
論文名稱(外文):THe circuit design of low noise amplifier and one-dimensional photonic bandgap filter
指導教授:邱炳樟邱炳樟引用關係
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電子工程系
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:62
中文關鍵詞:低雜訊放大器一維電磁能隙濾波器
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本論文分成兩大主題。第一主題主要在於探討低雜訊功率放大電路所需的基本理論,以及電路設計方法,並實際製作兩個低雜訊放大電路。其一操作頻率範圍為1.92~1.98GHz。採用Agilent的 ATF-54143電晶體,設計時包括了S參數的匹配設計與雜訊指數(NF)小於1dB匹配設計,經模擬得到電路的增益為15dB。另其一則利用平衡式電路的優點,設計出寬頻、高的輸入三階截斷點(IIP3),經模擬得到電路的增益為13.9dB和操作頻率範圍為1.5GHz以上。設計電路時以ADS進行電路模擬,並以P-CAD完成電路佈局的工作。
第二主題主要是針對一維光子能隙(Photonic Bandgap 簡稱PBG)結構電路,提出設計公式,包括了截止帶中心頻率與截止帶頻寬大小的預測公式;由實際電路的模擬與量測結果可知,電路截止帶中心頻率和頻寬皆趨近於設計目標。設計電路時以IE3D進行電路模擬,並以P-CAD完成電路佈局的工作。
This thesis can be classified into two subjects. First ,we will discuss the basic theory of low noise amplifier, and many design technology of circuit. Moreover, we will also implement two low noise amplifier. One of the operating frequency range of the low noise amplifier is 1.92~1.98GHz, and its circuit design uses ATF-54143 transistor of Agilent ,which noise figure by match S-parameter must be smaller than 1dB. In the simulation results, we obtained the gain of low noise amplifier that is 15dB. The other amplifier we uses an advantage of the balance circuit to obtain wide bandwidth and high IIP3. In the simulation results, we obtained the gain of low noise amplifier that is 13.9dB. ADS was used to the circuit design to process the circuit simulation, and P-Cad
was used to finish PCB layout.
Second, design formulas for the one-dimensional photonic bandgap(PBG) structures are presented. Using the formulas, the center frequency and bandwidth of bandgap can be accurately predicted. The results of simulation and measurement were generally in good agreement. IE3D was used to the circuit design to process the circuit simulation, and P-Cad was used to finish PCB layout
目錄
論文摘要 I
ABSTRACT II
誌謝 II
圖表索引 VII
第一章 緒論 1
1.1 研究動機 1
1.2 論文目的 2
1.3 論文內文與架構 3
第二章 WCDMA低雜訊功率放大器之設計 4
2.1 簡介 4
2.2 RF放大器設計理論 4
2.2.1 功率增益 4
2.2.2 穩定性 6
2.3 雜訊 9
2.3.1 雙埠網路之雜訊 9
2.3.2 等雜訊指數圓 12
2.4 微波電路參數簡介 13
2.4.1 靈敏度 13
2.4.2 1-dB增益壓縮點( ) 14
2.4.3 諧波失真 14
2.4.4 交互調變失真 15
2.4.5 三階截斷點(IP3) 16
2.4.6 鄰近通道功率比(ACPR) 17
2.5 平衡功率放大器電路架構 18
2.6 低雜訊放大器電路設計與製作 19
2.6.1 I-V圖 19
2.6.2 直流偏壓電路和匹配電路 21
2.6.3 電路佈局 22
2.6.4 實際測量 23
2.6.5 量測結果分析 28
2.7 塔式固定放大器電路設計(TMA) 28
2.7.1 平衡式放大器 28
2.7.2 實際量測 30
2.7.3 結果分析 34
第三章 PBG結構的濾波器設計 35
3.1 簡介 35
3.2 微帶傳輸線 36
3.3 截止帶中心頻率的公式推導 38
3.3.1 多重路徑反射基本概念 38
3.3.2 PBG結構截止帶中心頻率分析 40
3.3.3 結語 42
3.4 截止帶頻寬的公式推導 43
3.4.1 截止帶下緣(Lower edge) 46
3.4.2 截止帶上緣(Upper edge) 47
3.5 微帶線之一維PBG結構電路模擬與實現 48
3.5.1 PBG結構電路設計 49
3.5.2 電路模擬結果 51
3.6 PHOTONIC BANDGAP結構電路量測結果 53
3.7 結語 56
第四章 結論 57
參考文獻 59
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