臺灣博碩士論文加值系統

本論文使用週期性阻抗變化的概念，來實現帶拒濾波器，內容包含了單線槽線帶拒濾波器、耦合槽線模態帶拒濾波器，九十度彎角耦合槽線模態帶拒濾波器，其結果分述如下。
首先，我們使用週期性阻抗變化的概念，來實現週期性阻抗變化的單線槽線帶拒濾波器，隨著週期數目的增加，這個濾波器的濾波效果會越來越佳。在設計的過程中，我們使用布拉格散射與小反射理論，來幫助我們快速地決定出濾波器的中心頻率。
接著，我們將週期性阻抗變化的單線槽線濾波器應用到耦合槽線上，完成週期性阻抗變化的耦合槽線模態帶拒濾波器。在設計的過程中，我們讓共面波導模態的阻抗維持匹配，以保持共面波導模態有良好的穿透量；僅讓耦合槽線的阻抗產生變化，使得耦合槽線模態產生大量的反射，進而達成抑制耦合槽線模態的效果。這個設計僅需要單層佈線，並且不用額外使用磅線，因此可以降低層與層之間的干擾以及磅線所造成的反射。
最後，我們將設計完成的週期性阻抗變化的耦合槽線模態帶拒濾波器，應用到九十度彎角共面波導結構，藉以降低九十度彎角共面波導結構的模轉換。這個帶拒濾波器可以維持共面波導模態良好的穿透量，同時使得耦合槽線模態有大量的反射，並且，在我們所設計的濾波器頻帶之內，有顯著的模轉換抑制的效果。

In this thesis, the idea of the periodic impedance change is used to implement various types of band-rejection filters, including the band-rejection filter implemented with the slotline, the band-rejection filter implemented with the coupled slotline, and the band-rejection filter implemented with the right-angled coupled slotline. The description is as follows.
First of all, the band-rejection filter using the concept of the periodic impedance change is implemented with the slotline. By increasing the number of periods, the rejection performance of this filter can be enhanced. During the design process, the Bragg scattering and small reflection theory are used to quickly determine the center frequency of this filter.
Secondly, the band-rejection filter using the concept of the periodic impedance change is implemented with the coupled slotline. During the design process, the impedance of the coplanar waveguide mode is maintained the same in order to preserve the good transmission coefficient of the coplanar waveguide mode. However, the impedance of the coupled slotline mode is varied periodically in order to produce a large amount of reflection for the coupled slotline mode. Since this band-rejection filter only requires a single layer without using any bondwires, the interference between layers can be reduced and the reflection caused by the bondwires can be eliminated.
Finally, band-rejection filter implemented with the coupled slotline is applied to eliminate the mode conversion induced by the right-angled coupled slotline. In addition to the good transmission coefficient of the coplanar waveguide mode and the large reflection coefficient of the coupled slotline mode, the mode conversion is enhanced within the filter rejection band.

摘要
Abstract
誌謝
目錄
圖目錄
表目錄
第1章 序論
1.1 研究動機
1.2 文獻探討
1.3 論文貢獻
1.4 論文架構
第2章 週期性阻抗變化的單線槽線濾波器
2.1 均勻阻抗單線槽線
2.1.1 槽線特性阻抗的萃取
2.1.2 頻域均勻阻抗單線槽線的模擬結果
2.2 週期性阻抗變化的單線槽線
2.2.1 設計過程
2.2.2 頻域的模擬結果
2.3 均勻阻抗與週期性阻抗變化的單線槽線之比較
2.3.1 頻域的模擬比較
2.4 小結
第3章 週期性阻抗變化之槽線模態濾波器
3.1 耦合槽線負載阻抗的模擬設定
3.1.1 金屬共面波導負載阻抗與耦合槽線負載阻抗的匹配
3.2 弱耦合槽線
3.2.1 頻域弱耦合槽線的模擬結果
3.2.2 時域的模擬結果
3.2.3 眼圖
3.2.4 驗證
3.2.4.1 頻域的模擬與量測
3.2.4.2 時域的模擬與量測
3.3 強耦合槽線
3.3.1 頻域強耦合槽線的模擬結果
3.3.2 時域的模擬結果
3.3.3 眼圖
3.3.4 驗證
3.3.4.1 頻域的模擬與量測
3.3.4.2 時域的模擬與量測
3.4 週期性阻抗變化的耦合槽線
3.4.1 設計過程
3.4.1.1 耦合槽線忽略不連續
3.4.1.2 補償耦合槽線阻抗
3.4.1.3 補償耦合槽線阻抗且考慮電氣長度不連續
3.4.2 頻域週期性阻抗變化的耦合槽線的模擬結果
3.4.3 時域的模擬結果
3.4.4 眼圖
3.4.5 驗證
3.4.5.1 頻域的模擬與量測
3.4.5.2 時域的模擬與量測
3.5 弱耦合、強耦合與週期性阻抗變化的耦合槽線之比較
3.5.1 頻域的模擬結果比較
3.5.1 時域的模擬結果比較
3.5.2 眼圖比較
3.6 小結
第4章 九十度彎角週期性阻抗變化的槽線模態濾波器
4.1 弱耦合九十度彎角耦合槽線
4.1.1 頻域弱耦合九十度彎角耦合槽線的模擬結果
4.1.2 時域的模擬結果
4.1.3 眼圖
4.1.4 驗證
4.1.4.1 頻域的模擬與量測
4.1.4.2 時域的模擬與量測
4.2 強耦合九十度彎角耦合槽線
4.2.1 頻域強耦合九十度彎角耦合槽線的模擬結果
4.2.2 時域的模擬結果
4.2.3 眼圖
4.2.4 驗證
4.2.4.1 頻域的模擬與量測
4.2.4.2 時域的模擬與量測
4.3 週期性阻抗變化的九十度彎角耦合槽線
4.3.1 頻域週期性阻抗變化的九十度彎角耦合槽線的模擬結果
4.3.2 時域的模擬結果
4.3.3 眼圖
4.3.4 驗證
4.3.4.1 頻域的模擬與量測
4.3.4.2 時域的模擬與量測
4.4 弱耦合、強耦合與週期性阻抗變化的九十度彎角耦合槽線之比較
4.4.1 頻域的模擬結果比較
4.4.2 時域的模擬結果比較
4.4.3 眼圖比較
4.5 小結
第5章 結論
參考文獻
附錄A 週期性變化之能量輻射
附錄B 與實務上常用的彎角方法比較

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