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研究生:雷宏裕
研究生(外文):H. Y. Lei
論文名稱:使用雙頻帶微波耦合器設計高性能單旁波帶混頻器之研究
論文名稱(外文):Research and Development of High Performance Single-Sideband Mixer Using Dual-Band Microwave Couplers
指導教授:江逸群江逸群引用關係李傑李傑引用關係
指導教授(外文):Chiang,Yit-ChyunLee,Jye
學位類別:碩士
校院名稱:長庚大學
系所名稱:電機工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2005
畢業學年度:93
語文別:中文
中文關鍵詞:單旁波帶混波器雙頻帶耦合器集總元件耦合器
外文關鍵詞:Single side-band mixerDual-band couplersLumped element couplers
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一般的單旁波帶混波器,藉由使用各一個射頻與中頻耦合器或一個中頻耦合器與一個90度相移的本地振盪訊號所構成的兩個雙平衡式混波器,來達成旁波帶拒斥與本地振盪至射頻端的隔離度。
本論文主要提出一個新的單旁波帶混波器架構,採用單平衡式二極體混波器架構,而且使用一個雙頻帶耦合器分別設計於射頻與中頻兩個頻帶,以減少電路面積。本論文也提出使用集總元件與分佈式集總元件的兩種雙頻帶耦合器設計方法。新的單旁波帶混波器架構包含一個環型二極體,而且用相差180度的本地振盪訊號所推動。如此,在雙頻帶耦合器的兩個輸入輸出埠會產生虛接地,而達到想要的本地振盪訊號對射頻端與中頻端的隔離度的目的。為了驗證所提的單旁波帶混波器設計方法,研製單旁波帶混波器於一般的PCB上。量測結果顯示轉換損耗約12.5dB,旁波帶抑制約21dB,載波抑制約15dB。
In the conventional designs of SSM, the side-band rejection and the LO-to-RF isolation have to be achieved by using two double-balance mixers in conjunction with either RF and IF couplers or an IF coupler and a quadrature-phase LO pumping signals.
This thesis presents a novel single sideband mixer (SSM) feature with adopting single-balanced diode mixers and a dual-band quadrature coupler, which is designed to operated at RF and IF bands, respectively, is proposed for minimizing the size of circuit. Two design approaches of constructing the dual band couplers with the lumped-element and distributed-lumped elements are proposed. This novel feature of SSM is consisted of a diode ring, and pumped by a differential LO signal. It results the virtual groundings feature respective to LO signal at two I/O ports of dual-band coupler to achieve the desired LO-to-RF and IF isolations. For verification of the proposed SSM design method, four experimental circuits were designed and fabricated on the conventional PCB. The measured results are the conversion loss of 12.5 dB, sideband suppression of 21dB, and carrier suppression of 15dB.
第一章 簡介………………………………………………………………1
1.1研究動機………………………………………………………1
1.2章節概述………………………………………………………1
第二章 混波器基本原理…………………………………………………3
2.1鏡頻拒斥與單旁波帶混波器基本原理及架構………………3
2.1.1鏡頻拒斥混波器基本動作原理…………………………4
2.1.2單旁波帶混波器基本動作原理…………………………6
2.2混波器的主要特性…………………………………………8
第三章 集總元件式耦合器……………………………………………11
3.1等效集總網路分析…………………………………………………11
3.2寬頻二階集總元件式耦合器………………………………………17
3.3雙頻帶二階集總元件式耦合器……………………………………23
第四章 單旁波帶混波器………………………………………………37
4.1混波器架構的選擇與動作原理分析………………………………37
4.2集總元件式耦合器電路設計………………………………………38
4.2.1射頻耦合器………………………………………………………38
4.2.2中頻耦合器………………………………………………………41
4.2.3本地震盪巴倫……………………………………………………44
4.3單旁波帶混波器……………………………………………………48
4.3.1電路設計…………………………………………………………48
4.3.2特性量測與討論…………………………………………………49
第五章 使用集總元件式雙頻帶耦合器設計單旁波帶混波器………56
5.1混波器架構的動作原理分析………………………………………56
5.2集總元件式雙頻帶耦合器電路設計………………………………57
5.3單旁波帶混波器……………………………………………………63
5.3.1電路設計…………………………………………………………63
5.3.2特性量測與討論…………………………………………………64
第六章 雙頻帶單旁波帶混波器………………………………………71
6.1集總元件式耦合器電路設計………………………………………71
6.1.1雙頻帶射頻耦合器………………………………………………71
6.1.2中頻耦合器………………………………………………………76
6.1.3雙頻帶巴倫………………………………………………………78
6.2雙頻帶單旁波帶混波器……………………………………………83
6.2.1電路設計…………………………………………………………83
6.2.2特性量測與討論…………………………………………………84
第七章 使用集總元件與分佈式元件的雙頻帶耦合器設計單旁波
帶混波器…………………………………………………………………96
7.1使用分佈式元件與集總元件的雙頻帶耦合器電路設計…………96
7.2巴倫電路設計………………………………………………………102
7.3單旁波帶混頻器……………………………………………………105
7.3.1電路設計…………………………………………………………105
7.3.2特性量測與討論…………………………………………………106
第八章 結論與建議……………………………………………………113
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