請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/38261
標題: | 微縮型分散集總式微帶線帶通濾波器 Compact Distributed-Lumped Microstrip Bandpass Filters |
作者: | Tsung-Nan Kuo 郭宗男 |
指導教授: | 陳俊雄(Chun-Hsiung Chen) |
關鍵字: | 微帶線帶通濾波器, Microstrip Bandpass Filters, |
出版年 : | 2005 |
學位: | 碩士 |
摘要: | 本論文提出新型微帶線帶通濾波器,並對其理論和實驗做了詳細的研究。
此新型架構,是將傳統四分之一波長電容電感型帶通濾波器加入另一條路徑,據此可以在通帶附近的高、低頻截止帶置入一對傳輸零點,進而改善高、低頻截止帶的特性。在論文中也針對截止帶中的傳輸零點做了詳細的推導與驗證。 為了在濾波器中創造第二條路徑,在電路佈局中讓兩個指插型電容靠近,使之成為間隙耦合電容,此舉不僅成功產生第二條路徑,且在不增加額外電路下達到縮小電路面積。另外本論文也提供了幾種改善電路響應與縮小面積架構的方法,最後並提出了高階新型微帶線帶通濾波器,來增加整個通帶的選擇度與截止帶的衰減。 In this study, novel compact distributed-lumped microstrip bandpass filters, based on folded quarter-wavelength(λ/4) resonators, are proposed. Two transmission zeros at upper and lower stopbands are created by introducing a cross-coupling capacitance directly between the input and output ports of a 2nd-order filter. This pair of transmission zeros would not degrade the passband insertion loss and may improve the selectively. In order to achieve good spurious response and small circuit area, suitable open stubs and stepped impedance resonators are adopted in the filter design. The improved results are verified through experiments. Moreover, a novel 4th-order filter is also implemented. By suitably introducing two capacitive cross-coupling paths in the 4th-order filter, improved selectivity and good stopband rejection can be achieved. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/38261 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-94-1.pdf 目前未授權公開取用 | 1.1 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。