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研究生： 王宸晟
Chen-Cheng Wang
論文名稱： 微型化合成共平面波導結構及其電路元件實現
Miniaturized Synthesized Coplanar Waveguides and its Circuit Implementation
指導教授： 馬自莊
Tzyh-Ghuang Ma
口試委員: 曾昭雄
Chao-Hsiung Tseng
鄭士康
Shyh-Kang Jeng
瞿大雄
Tah-Hsiung Chu
學位類別： 碩士
Master
系所名稱： 電資學院 - 電機工程系
Department of Electrical Engineering
論文出版年： 2009
畢業學年度： 97
語文別： 英文
論文頁數： 110
中文關鍵詞： 共平面波導 、合成傳輸線 、慢波特性 、直交分合波器 、鼠競耦合器 、耦合線方向耦合器
外文關鍵詞： coplanar waveguide, synthesized transmission line, slow wave, quadrature hybrid, rat-race coupler, coupled-line directional coupler.
相關次數： 點閱：446  下載：7 
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  •  上一筆

    • 本論文提出兩款新型合成共平面波導，它們乃藉由準集總元件來合成傳輸線之特性，其名稱分別為『單平面合成共平面波導』及『含背板電容合成共平面波導』。本論文詳盡討論此合成共平面波導之設計理念、傳波特性、等校集總電路模型、以及模擬與量測結果。
    使用該合成共平面波導，本論文設計完成兩款直交分合波器與兩款鼠競耦合器，並對電路響應有深入之探討與表列比較。其中，以『含背板電容合成共平面波導』所完成之兩款分合波器，其電路面積皆為文獻記載中以印刷電路板製程所實現之最小型化設計。
    本論文亦提出三款微型化耦合線方向耦合器，分別為側邊偶合背向耦合器、寬面耦合背向耦合器與順向耦合器。其電路響應亦有深入之探討與表列比較。為提供完整之設計參考，本論文提供基耦模態之特徵阻抗及耦合量的設計圖表。此方向耦合器之耦合量可輕易由準集總互容及對地電容進行調整。與傳統設計相比較，本論文所提出之方向耦合器皆有極小之電路面積與相當之電路響應。

    We proposed two novel synthesized coplanar waveguides in this thesis. The novel designs are realized by quasi-lumped elements, and are named as the uniplanar synthesized coplanar waveguide (USCPW) and the capacitor-backed synthesized coplanar waveguide (CBSCPW). The design concepts, propagation characteristics, equivalent lumped circuit models, and simulated and measured results are carefully investigated and discussed.
    Miniaturized quadrature hybrids and rat-race couplers are developed by utilizing the proposed synthesized coplanar waveguides. The circuit performances are investigated and tabulated. The proposed quadrature hybrid and rat-race coupler using the capacitor-backed synthesized coplanar waveguide feature the smallest size among the designs ever reported with printed circuit board fabrication process.
    Miniaturized coupled-line directional couplers including backward-wave edge-coupled coupler, backward-wave broadside-coupled coupler, and forward-wave coupler are designed and investigated using the uniplanar synthesized coplanar waveguides. The even odd modes analysis and simulated and measured results are discussed. Design graphs are derived for easy reference. The coupling coefficients can be easily controlled by adjusting the quasi-lumped mutual capacitance and shunt-to-ground capacitance of the synthesized lines. As compared with the conventional designs, the proposed couplers feature comparable performance with extremely compact sizes as well.

    摘要 I Abstract III 誌謝 V Table of Contents VII List of Figures IX List of Tables XVII Chapter 1 Introduction 1 1.1 Motivations 1 1.2 Literature Survey 2 1.3 Contribution 3 1.4 Chapters Outline 5 Chapter 2 Essentials of Synthesized Coplanar waveguides 6 2.1 Introduction 6 2.2 Uniplanar Synthesized Coplanar Waveguide 6 2.2.1 Geometry and the Equivalent Circuit Model 6 2.2.2 Simulation and measurement 10 2.2.3 Discussion 13 2.3 Capacitor-Backed Synthesized Coplanar Waveguide 14 2.3.1 Design Concept and Geometry 14 2.3.2 Equivalent Circuit Model and Design Example 15 2.3.3 Simulation and measurement 16 2.3.4 Discussion 19 2.4 Summary 20 Chapter 3 Miniaturized Hybrid Couplers 42 3.1 Introduction 42 3.2 Conventional Quadrature Hybrid and Rat-Race Coupler 43 3.3 Miniaturized Hybrid Couplers Using Uniplanar Synthesized Coplanar Waveguide 44 3.4 Miniaturized Hybrid Couplers Using Conductor-Backed Synthesized Coplanar Waveguide 48 3.5 Summary 51 Chapter 4 Miniaturized Coupled-Lines Couplers 71 4.1 Introduction 71 4.2 Fundamental of Coupled-Line Couplers 72 4.2.1 Conventional Configuration with Even Odd Mode Analysis 72 4.2.2 Backward-wave directional coupler 73 4.2.3 Forward-wave directional couplers 74 4.3 Miniaturized Edge-Coupled Directional Coupler 75 4.4 Miniaturized Broadside-Coupled Directional Coupler 80 4.5 Miniaturized Forward-Wave Directional Coupler 83 4.6 Summary 85 Chapter 5 Conclusions 105 5.1 Summary 105 5.2 Future works 106 References 107 Author 111

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