陳俊雄臺灣大學:電信工程學研究所郭宗男Kuo, Tsung-NanTsung-NanKuo2007-11-272018-07-052007-11-272018-07-052005http://ntur.lib.ntu.edu.tw//handle/246246/58619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.第一章 簡介………………………………………………………1 第二章 濾波器之理論分析………………………………………5 2-1 前言…………………………………………………6 2-2 集總式濾波器理論分析……………………………6 2-3 分散式帶通濾波器…………………………………12 第三章 微縮型分散集總式帶通濾波器 ………………………28 3-1 前言…………………………………………………29 3-2 設計原理……………………………………………30 3-3 高頻與低頻截止帶傳輸零點之定性分析…………37 3-4 結論…………………………………………………50 第四章 新型改良分散集總式帶通濾波器 ……………………51 4-1 前言…………………………………………………52 4-2 抑制倍頻響應分散集總式帶通濾波器_1…………52 4-3 抑制倍頻響應分散集總式帶通濾波器_2…………56 4-4 步階阻抗改良分散集總式帶通濾波器……………59 4-5 四階微縮型分散集總式帶通濾波器………………71 4-6 結論…………………………………………………84 第五章 總結 ……………………………………………… 85 參考文獻……………………………………………………………891121773 bytesapplication/pdfen-US微帶線帶通濾波器Microstrip Bandpass Filters微縮型分散集總式微帶線帶通濾波器Compact Distributed-Lumped Microstrip Bandpass Filtersthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58619/1/ntu-94-R92942054-1.pdf