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博碩士論文 etd-0627117-164623 詳細資訊
Title page for etd-0627117-164623
論文名稱
Title
具有傳輸零點之多頻帶通濾波器設計與實現
Design and Implementation of Miniaturized Multi-Band Bandpass Filter with Tunable Transmission Zeros
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
66
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2017-07-24
繳交日期
Date of Submission
2017-07-27
關鍵字
Keywords
多頻段、傳輸零點、帶通濾波器、多層板
Multi band, Transmission Zeros, Bandpass filte, Multi Layer
統計
Statistics
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中文摘要
摘要
本論文提出了一種應用於微型多頻帶通濾波器的多層堆疊步
階阻抗諧振器( SSIR) , 此多層諧振器結構有助於減小濾波器尺
寸。基於耦合諧振器的理論,可以藉由耦合係數及外部品質因子
的決定來設計多個通帶,另外還提出一種控制阻帶傳輸零點的方
法。 本論文所設計第一個帶通濾波器操作中心頻率為 3.5 GHz,
頻寬為 7.2%,整體尺寸不考慮饋入線為 4.2 mm  5.2 mm, 並藉
由電或磁耦合來控制傳輸零點。第二個帶通濾波器設計提出了一
個新的方法來效調整傳輸零點,此方法乃利用貫孔及其與接地平
面間的環形槽。 第三個帶通濾波器設計為三頻帶通濾波器,此設
計利用微型化 SSIR,使用了三層金屬,基板為 RT/Duroid 6010,
厚度為 0.568 mm, 介電常數為 10.2, 濾波器尺寸為 2.8 mm  2.5
mm。第四種設計為利用 SSIR 結構的四頻帶通濾波器,此設計可
以透過適當地調整兩耦合 SSIR 在第一層及第二層的間隙寬度來
分別控制第一及第三通帶與第二及第四通帶。
Abstract
Abstract
This thesis presents a stacked stepped impedance resonator (SSIR) structure for
designing compact multi-band bandpass filters (BPFs). The multilayer resonator structure is
used to reduce the filter size. Moreover, based on the theory of coupled resonators, the desired
characteristics of its multiple passbands can be obtained by determining the coupling
coefficients and external quality factors. Furthermore, a novel technique has been developed
to create controllable transmission zeros (TZs) in the stopbands. This thesis includes four
bandpass filter designs with specific requirements. The first BPF design was designed with the
center frequency of 3.5 GHz and the FBW of 7.2%. The TZ can be created and adjusted using
either magnetic or electric coupling. The overall size of this filter is 4.2 mm 5.2 mm without
the feeding lines. The second design proposed a new approach to tune the TZs. By using
through vias with the isolation ring slots on the ground plane, the TZs can be controlled
effectively. The third design is about the tri-band BPF using stacked stepped impedance
resonators (SSIRs). It was designed on a 0.568 mm thick three-layer RT/Duroid 6010 substrate
with dielectric constant of 10.2. It occupies an area of 2.8 mm 2.5 mm. The fourth design
uses the SSIR structure to design a compact quad-band BPF. The first and third passbands and
the second and fourth passbands can be separately adjusted by changing the width of the gaps
between two coupled SSIRs in the second and first layer, respectively
目次 Table of Contents
Table of Contents
論文審定書.................................................................................................................................i
Acknowledgements....................................................................................................................ii
Abstract (Chinese) ....................................................................................................................iii
Abstract (English) .....................................................................................................................iv
Table of Contents.......................................................................................................................v
List of Tables ...........................................................................................................................vii
List of Figures.........................................................................................................................viii
List of Symbols.........................................................................................................................xi
Chapter 1....................................................................................................................................1
Introduction................................................................................................................................1
1.1 Background..........................................................................................................................1
1.2 Motivation............................................................................................................................2
1.3 Structure of Contribution of Thesis .....................................................................................3
Chapter 2....................................................................................................................................5
Coupled Multilayer Resonators .................................................................................................5
2.1 Microstrip Lines...................................................................................................................5
2.2 Effective Dielectric Constant and Characteristic Impedance ..............................................6
2.3 Coupled Resonator Circuits .................................................................................................7
2.3.1 Synchronously Tuned Coupled-Resonator Circuits..........................................................8
2.3.2 Mixed Coupling ..............................................................................................................13
2.4 General Formula for Extracting Coupling Coefficient k ...................................................16
2.5 General Formula for Extracting Quality Factor Qe ...........................................................17
2.6 Multilayer BPFs .................................................................................................................18
Chapter 3..................................................................................................................................20
Design of Miniaturized BPFs...................................................................................................20
3.1 Experimental Set-up...........................................................................................................20
3.2 Design of One-Band BPF Using FR-4 Substrate...............................................................21
3.2.1 Design Procedure............................................................................................................21
3.2.2 Result and Approach for Tunable TZs............................................................................23
3.3 Miniaturized BPF Using Additional Ring Slot..................................................................26
3.3.1Filter Design Procedure ...................................................................................................26
3.3.2 Result and Analysis.........................................................................................................29
3.4 Design of Tri-band BPF.....................................................................................................31
3.4.1 Design Procedure............................................................................................................31
3.4.3. Analysis and results of a Tri-band BPF ........................................................................34
3.5 Design of Quadband BPF ..................................................................................................40
3.5.1 Design Procedure............................................................................................................41
3.5.3 Result and Analysis.........................................................................................................44
Chapter 4..................................................................................................................................50
Conclusion ...............................................................................................................................50
References................................................................................................................................51
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