研究生: |
洪琬婷 Wan-Ting Hung |
---|---|
論文名稱: |
以離散時域V形濾波器技術製作帶拒濾波器及其應用 Bandstop Filters using Discrete-Time Notch-Filter Techniques and Their Applications |
指導教授: |
徐敬文
Ching-Wen Hsue |
口試委員: |
伍長裕
none 張道治 none 陳國龍 none 黃進芳 none |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 英文 |
論文頁數: | 64 |
中文關鍵詞: | 離散時域技術 、V形濾波器 、帶拒濾波器 |
外文關鍵詞: | discrete-time technique, notch filter, bandstop filter |
相關次數: | 點閱:253 下載:0 |
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平行耦合微帶線濾波器被廣泛使用在微波及毫米波系統。但濾波器受倍頻響應所影響。本論文中我們提出一個設計微小化帶拒濾波器的方法。藉由並聯多段正確頻率的兩段式開路殘枝,我們可以得到一個任意頻寬的帶拒濾波器。在這個論文的最後,我們利用之前提過的觀念完成二階巴特渥斯耦合帶通濾波器二倍頻及三倍頻的抑制。
這個方法是先提出二階V字型濾波器在Z域中的系統方程式。本論文中推導傳輸線鏈散矩陣。濾波器的設計可由串連傳輸線和並聯兩段式開路殘枝完成。實驗結果被提出來來驗證此方法的可行性。
Parallel coupled-line microstrip filters have been widely used in many microwave and millimeter wave systems. The filters are usually degraded by the spurious response at twice the passband frequency. In this thesis, we propose a new method for the design of a compact bandstop filter. A bandstop filter of arbitrary bandwidth can be obtained by a cascade connection of multi-staged two-section open stubs with proper frequency scaling. At the last of the thesis, we apply the concept mentioned before to achieve the suppression of the second and third harmonics of the second-order Butterworth coupled-line bandpass filter.
In this method, the system function of the second-order notch filter in Z-domain is studied first. The chain-scattering matrices of several transmission lines are then derived in the thesis. The design of the filter is finished with serial lines and two-section shunted open stubs. Experimental results are presented to illustrate the validity of this design method.
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