以等長線及嵌入型架構設計微波濾波器｜國立臺灣科技大學博碩士論文系統

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研究生：	徐智禎 Chih-Chen Hsu
論文名稱：	以等長線及嵌入型架構設計微波濾波器 Design of Microwave Filter Using Equal-Length Line and Embedded Structure
指導教授：	徐敬文 Ching-Wen Hsue
口試委員:	黃進芳 Jhin-Fang Huang 張勝良 Sheng-Lyang Jang 劉榮宜 Ron-Yi Liu 陳一鋒 I-Fong Chen
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：	2008
畢業學年度：	96
語文別：	英文
論文頁數：	76
中文關鍵詞：	嵌入型殘枝、窄頻帶拒濾波器、離散時域技術
外文關鍵詞：	embedded stub, narrow stop-band filter, discrete time technique
相關次數：	點閱：218 下載：0
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微波帶拒濾波器可用來過濾特定頻率的傳輸信號，但是其衰減斜率的好壞會影響到信號過濾的程度。本篇論文提出一個嵌入型兩段開路殘枝的帶拒濾波器架構，其衰減斜率較一般微帶線並聯開路殘枝較優良且頻寬較窄。經由控制正確頻率下的嵌入型兩段開路殘枝，可以得到任意一個頻寬的帶拒濾波器。
另外，我們提出在Z域下等長三段式並聯開路殘枝的鏈散射參數，以此架構加上已經發展出的兩段式並聯開路殘枝，設計出離散時間低通帶濾波器，其效果相較於傳統用頻域方法設計出來的低通濾波器較好。最後，把前面提出的嵌入型兩段開路殘枝應用在此低通濾波器，改善其衰減斜率。實驗結果被提出來驗證此方法可行性。

Microwave band-stop filter is able to filter a given transmitted signal, but its rate of cutoff will affect the degree of signal filtering. In this thesis, we propose a new embedded two-section open-circuited band-stop filter. In this structure, the rate of cutoff is sharper than conventional microstrip line shunted with open stub; moreover, its bandwidth is also narrower. The desired bandwidth of band-stop filter can be obtained by controlling the embedded two-section open stub.
Besides, we propose the chain-scattering parameters of equal-length three-section open stub in Z-domain, and then we design a discrete-time low-pass filter using three-section structure and the well-developed two-section open stub. Its performance is better than the conventional low-pass filter using frequency-domain method. Finally, we apply the embedded two-section open stub to the Chebyshev type II low-pass filter to improve its rate of cutoff. Experimental results are presented to illustrate the validity of this design method.

摘要..........................................................................I
Abstract.....................................................................II
誌謝....................................................................... III
Contents.....................................................................IV
List of Figures..............................................................VI
Chapter 1 Introduction........................................................1
1.1 Motivation................................................................1
1.2 Proposal..................................................................2
1.3 Outline of Chapters.......................................................4
Chapter 2 Basic Theory........................................................5
2.1 Discrete-Time Filter......................................................5
2.2 Bilinear Transformation...................................................7
2.3 Microstrip Line...........................................................9
Chapter 3 Transfer Functions of Transmission Line and Cascaded Networks......11
3.1 Chain-Scattering Parameters..............................................12
3.2 Fundamental Circuits and Their Chain-Scattering Parameters...............14
3.2.1 A Serial Transmission-Line Section.....................................14
3.2.2 An Open-Circuited Single-Section Stub..................................18
3.2.3 A Short-Circuited Single-Section Stub..................................20
3.2.4 An Open-Circuited Double-Section Stub..................................22
3.2.5 An Open-Circuited Three-Section Stub...................................24
3.3 Transfer Functions of Cascaded Network...................................26
3.4 Conversion of System Function into Autoregressive Process................28
Chapter 4 Notch Filter Using Two-Section Open Stub and Its Application to Embedded Structure...........................................................31
4.1 Notch Filter Using Two-Section Open Stub.................................31
4.2 Notch Filter Using Embedded Structure....................................40
4.2.1 Character of Notch Filter with Embedded Open-Circuited Stub............40
4.2.2 Notch Filter with Embedded Two-section Open-Circuited Stub.............43
Chapter 5 Implementation and Experimental Result.............................49
5.1 Notch filters using Embedded Two-Section Stub............................49
5.2 A Low-Pass Filter Using Multiple-Section Stubs...........................53
5.3 The Applications of Embedded Two-Section Open Stub on Microwave Low-Pass Filters......................................................................61
Chapter 6 Conclusion and Future Work.........................................64
6.1 Conclusion...............................................................64
6.2 Future Work..............................................................64
Reference....................................................................66

                                

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全文公開日期 2013/07/16 (校內網路)
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