臺灣博碩士論文加值系統

本篇論文利用共平面波導接地面缺陷結構(Coplanar Waveguide Defected Ground Structure, CPWDGS)來設計新型帶止型濾波器的單位元件及週期性結構。
本論文提出新型共平面波導接地面缺陷結構帶止型濾波器，利用其特殊的幾何結構，使其產生禁、通帶範圍，並且討論分析其幾何結構之各物理尺寸參數與特性變化對其頻率的影響。
對電磁能隙的新型共平面波導接地面缺陷結構之週期性結構，分析討論其改變不同的情況下之影響。由單位元件的慢波因子來預測其週期性結構的通、禁帶範圍，並從實驗結果中來證實由單位元件的慢波因子可預測週期性結構通、禁帶的範圍。這使設計者不需耗費大量的時間與電腦資源，而能有效且快速的預測新型共平面波導接地面缺陷結構之週期性電路特性。


關鍵字:共平面波導、接地面缺陷結構、帶止型濾波器、電磁能隙、慢波因子

The thesis uses coplanar waveguide defected ground structure (CPW DGS) to design new band-stop filters of unit-cell and periodic structures.
The thesis proposes novel CPW DGS band-stop filters. The special geometry structures of the filters produce cut-off and pass band ranges. We discuss the influence of the geometric structure parameters of the physical size on the frequency characteristics.
In this thesis, the periodic coplanar waveguide defected ground structures with electromagnetic bandgap (EBG) characteristics are analyzed under different circumstances. The periodic structures in cut-off and pass band ranges can be predicted by the slow wave factor of the unit cell. This is proved by the experiment results. The results of the thesis provide an effective and rapid prediction for designers without spending a lot of time and computer resources.


Keyword：Coplanar waveguide, Defected ground structure, Band-stop filters, Electromagnetic bandgap, Slow wave factor

目錄
摘要 Ⅰ
Abstract Ⅱ
誌謝 Ⅲ
目錄 Ⅳ
表目錄 Ⅶ
圖目錄 Ⅸ
第一章 緒論 1
1-1 前言 1
1-2 研究動機 1
1-3 論文架構 2
第二章 相關內容理論簡介 4
2-1 共平面波導結構簡介 4
2-2 接地面缺陷面結構簡介 5
2-3 電磁能隙與光子能隙 5
2-4 無限長週期性結構理論 6
2-5 κ-β圖與慢波傳播 10
2-6 S參數 11
第三章 十字複合形頭共平面波導接地缺陷結構 13
3-1 十字複合形頭共平面波導接地缺陷結構 13
3-2 十字複合頭型單位元件等效電容電感電路集總元件值計算 23
3-3 十字複合頭型單位元件電路設計之實驗結果與模擬分析 23
3-4 成品實作、模擬結果與量測數據之比較 55
第四章 十字複合型之週期性結構 71
4-1 十字正方形頭實驗 71
4-1-1 十字正方形頭週期性結構之討論分析 71
4-1-2 十字正方形頭單位元件改變串接個數之影響 72
4-1-3 十字正方形頭單位元件改變串接距離d之影響 73
4-1-4 十字正方形頭改變單位元件之W，產生不同共振頻率之影響 74
4-2 十字圓形頭實驗 80
4-2-1 十字圓形頭週期性結構之討論分析 80
4-2-2 十字圓形頭單位元件改變串接個數之影響 81
4-2-3 十字圓形頭單位元件改變串接距離d之影響 82
4-2-4 十字圓形頭改變單位元件之W，產生不同共振頻率之影響 83
4-3 十字等腰直角三角形頭實驗 89
4-3-1 十字等腰直角三角形頭週期性結構之討論分析 89
4-3-2 十字三等腰直角角形頭單位元件改變串接個數之影響 90
4-3-3 十字等腰直角三角形頭單位元件改變串接距離d之影響 91
4-3-4 十字等腰直角三角形頭改變單位元件之W，產生不同共振頻率之影響 92
4-4 成品實作、模擬結果與量測數據之比較 98
第五章 單位元件傳播常數與慢波因子對週期性結構分析討論 110
5-1 單位元件之傳播常數與週期性構的禁、通帶關係 110
5-2 單位元件之傳播常數分析週期性結構的禁、通帶 110
第六章 結論 120
參考文獻 121

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