臺灣博碩士論文加值系統

在本論文中提出一種新型架構的平行耦合(Parallel-Coupled)之帶通濾波器(Bandpass filter)，選擇容易實現的平行耦合架構，並運用微帶線(Microstrip Line)不連續面形成的阻抗比來達到控制混附波響應(Spurious Response)，改善選擇性之特性；所提出的帶通濾波器中心頻率為2.4 GHz，具有對稱的抑制特性與較佳的諧波抑制(Harmonic Suppression)及高選擇性(High Selectivity)。並將電路進行彎折縮小化，使其面積縮減了61%，具有更小的電路尺寸。

This paper presents a new structure of Parallel-Coupled Bandpass filter. This structure offers a simple and easy method to manufacture Bandpass filter. Parallel-Coupled design uses impedance ratio formed by the discontinuity surface in Microstrip Line to achieve conditioning Spurious Response and improvement of characteristic for Selectivity; The central frequency of the Bandpass filter is 2.4GHz.
This Bandpass filter features Symmetrical Suppression characteristic, and it has better Harmonic Suppression and higher Selectivity. This paper includes the content of how to bending electric circuit and hence shrinks area to 61% for compact electric circuit.

目錄
誌謝 i
摘要 ii
Abstract iii
目錄 iv
圖目錄 vi
表目錄 ix
第一章、緒論 1
1-1 研究動機及目的 1
1-2 文獻回顧 3
1-3 論文架構 5
第二章、濾波器介紹與平行耦合微帶線原理 6
2-1 濾波器介紹 6
2-1.1 濾波器基礎原理 6
2-1.2 濾波器頻率響應方式 10
2-2 平行耦合微帶線原理 13
2-2.1 微帶線傳輸線介紹 13
2-2.2 微帶線的傳播模態 14
2-2.3 微帶線各項參數設計 16
2-2.4 平行耦合微帶線分析 21
2-2.5 非對稱SIR架構 26
第三章、平行耦合帶通濾波器之設計 27
第四章、新型小型化平行耦合之帶通濾波器 39
第五章、結論 54
參考文獻 55




圖目錄
圖1-1 射頻收發機架構 1
圖1-2 微帶線增加集總電容 3
圖1-3 非對稱耦合微帶線 4
圖1-4 小型帶通濾波器 4
圖2-1 低通濾波器的頻率響應圖 7
圖2-2 高通濾波器頻率響應圖 7
圖2-3 帶通濾波器頻率響應圖 8
圖2-4 帶拒濾波器頻率響應圖 9
圖2-5 濾波器常見的規格 10
圖2-6 巴特沃斯濾波器頻率響應圖 11
圖2-7 柴比雪夫濾波器頻率響應圖 12
圖2-8 橢圓函數濾波器頻率響應圖 13
圖2-9 微帶線的3D 架構 14
圖2-10 微帶線之電場與磁場分布圖 15
圖2-11 平行耦合線 22
圖2-12 兩邊開路之平行耦合 25
圖2-13 平行耦合線帶通響應 25
圖2-14 非對稱SIR 26
圖3-3 先期測試一實體電路圖 29
圖3-5 先期測試一電流分佈 30
圖3-7 先期測試二電流分佈 31
圖3-9 先期測試二實體電路 33
圖3-10 先期測試二模擬與實測結果 33
圖3-11 微帶線彎折方式 34
圖3-12 先期測試三結構圖 35
圖3-13 先期測試三電流分佈 36
圖3-14 先期測試二與先期測試三模擬結果比較 36
圖3-15 先期測試三實體電路 37
圖4-1 電路架構一結構圖 40
圖4-2 電路架構一電流分佈 41
圖4-4 電路架構一實體電路 42
圖4-5 電路架構一模擬與實測結果 43
圖4-6 電路架構二結構圖 44
圖4-7 電路架構二電流分佈 45
圖4-8 電路架構一與電路架構二模擬結果比較 46
圖4-9 電路架構二實體電路 47
圖4-10 電路架構二模擬與實測結果 47
圖4-11 電路架構三結構圖 48
圖4-12 電路架構三電流分佈 49
圖4-13 電路架構二與電路架構三模擬結果比較 50
圖4-14 電路架構三實體電路 51
圖4-15 電路架構三模擬與實測結果 51
圖4-16 先期測試一與電路架構三模擬結果比較 52

表目錄
表1-1 2.4GHz常用通訊種類 2
表3-1 先期測試一尺寸參數 28
表3-2 先期測試二尺寸參數 31
表3-3 先期測試一與先期測試二結果比較 32
表3-4 電路架構三尺寸參數 35
表3-5 先期測試二與先期測試三結果比較 37
表4-1 電路架構一尺寸參數 40
表4-2 先期測試三與電路架構一結果比較 42
表4-3 電路架構一模擬與實測結果比較 43
表4-4 電路架構二尺寸參數 45
表4-5 電路架構一與電路架構二結果比較 46
表4-6 電路架構二模擬與實測結果比較 48
表4-7 電路架構三尺寸參數 49
表4-8 電路架構二與電路架構三結果比較 50
表4-9 電路架構三模擬與實測結果比較 52
表4-10 先期測試一與電路架構三結果比較 53

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