博碩士論文 93533015 詳細資訊


姓名 高宗平(Tsung-Ping Kao)  查詢紙本館藏   畢業系所 通訊工程學系在職專班
論文名稱 對稱式共面波導耦合線帶通濾波器
(Symmetric CPW Coupled-Line Band-Pass Filters)
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摘要(中) 本論文針對對稱式共面波導耦合線帶通濾波器的理論、設計流程及實驗,做了詳細的研究。
此對稱架構,可視為傳統型四分之一波長電容電感耦合型帶通濾波器與帶磚型濾波器的結合。為了設計成對稱式結構,我們使用了非對稱的三線式共面波導耦合線來設計,因而不需要額外的磅線或空氣橋來抑制奇模態的產生,故在實現時製作簡單是其中一個優點。此外,由於採用四分之一波長共振機制,不但有電路面積縮小的優點,更因為電路佈局的關係,其產生的寄生效應可在濾波器的通帶兩側各置入一個傳輸零點,藉此改善通帶附近的止帶衰減,以期符合系統規格需要。
在論文中,我們針對不同的佈局方式作比較,對於末端短路耦合線中心線接地實現的問題,也利用佈局的方式解決。
摘要(英) In this study, a class of symmetric CPW coupled-line bandpass filters is proposed. The proposed filters use the asymmetric three-line parallel-coupled CPW line and lump-element J- or K- inverters to realize symmetric CPW filter structures. Due to the symmetry, no bondwires or airbridges are required, which simplifies the fabrication process. The proposed filter structures are equivalent to quarter-wavelength resonator bandpass filters, such that they occupy only half the circuit area compared with the conventional ones, and the first spurious passbands of them occur at three times center frequency. In addition, by introducing the cross-coupling effect, two transmission zeros at the upper and lower stopbands can be created to further improve the selectivity. The working mechanisms of the proposed filters are described and design procedures are established in this thesis, so we can design the filter easily with the given specifications. Specifically, symmetrical CPW bandpass filters based on open-end and short-end parallel-coupled CPW line are designed and implemented, and the simulation results agree quite well with the measurement results.
關鍵字(中) ★ 共面波導
★ 濾波器
關鍵字(英) ★ CPW
★ filters
論文目次 第一章 緒論 6
1.1 研究背景與動機 6
1.2 相關研究 9
1.3 論文架構 12
第二章 濾波器基本理論 13
2.1 簡介 13
2.2 集總式濾波器 13
2.3 分散式濾波器 21
2.4 耦合線濾波器 33
第三章 對稱式共面波導濾波器 38
3.1 簡介 38
3.2 等效電路 39
3.3 設計流程 44
3.4 特性分析 46
3.5 結論 52
第四章 設計、製作與量測結果 53
4.1 簡介 53
4.2 非對稱式耦合線濾波器設計 54
4.3 對稱式末端開路耦合線濾波器設計 57
4.4 對稱式末端短路耦合線濾波器設計 64
4.5 結論 66
第五章 結論 67
參考文獻 69
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[17]Y.-S. Lin, C.-H. Wang, C.-H. Wu, and C. -H. Chen, “Novel compact parallel- coupled microstrip bandpass filter with lumped-element K-inverters,” IEEE Trans. Microwave Theory Tech., vol. 53, pp.2234-2238, July. 2005.
[18] Y.-S. Lin; M.-S. Hsu; C.-H. Wang; C.-H. Chen;”Millimeter-wave coplanar-waveguide parallel-coupled bandpass filters with lumped-element K-inverters” 2005 European Microwave Conference b Volume 2, 4-6 Oct. 2005 Page(s):4 pp.
[19] Yan, Y.-M.; Chang, Y.-T.; Wang, H.; Wu, R.-B.; Chen, C. -H., “Highly Selective Microstrip Bandpass Filters in Ka-Band,” European Microwave Conference, 2002. 32nd Oct. 2002 Page(s):1 – 4.
[20]許旻舜,”共面波導耦合線帶通濾波器”,國立台灣大學電信工程研究所碩士論文2004
[21]方國誌,”超寬頻共平面波導帶通濾波器之研製”,國立中央大學電機工程研究所碩士論文2006
指導教授 詹益仁(Y.J. Chan) 審核日期 2007-7-24
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