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研究生:顧震霄
研究生(外文):Chen-Hsiao Ku
論文名稱:微型化枝幹耦合器之雙頻帶平衡放大器設計與製作
論文名稱(外文):Design and Implementation of Dual-band Balance Amplifier using Compact Branch-Line Coupler
指導教授:廖時三
指導教授(外文):Shry-Sann Liao
學位類別:碩士
校院名稱:逢甲大學
系所名稱:資訊電機工程碩士在職專班
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:2006
畢業學年度:94
語文別:中文
論文頁數:80
中文關鍵詞:雙頻帶微型化平衡式放大器枝幹耦合器
外文關鍵詞:miniature or compactBranch-Line CouplerDual-bandBalance Amplifier
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寬頻與雙頻是通信產業的趨勢,通信系統中的耦合器在微波電路中更為一重要元件。傳統耦合器雙頻應用,首推混合型Right/Left-Handed傳輸線;然而,此架構於硬體電路實現上較為複雜而增加製作成本,Lump元件與微帶線混合設計,除衍生高頻電路散射效應,亦無法擺脫製造複雜及增加成本等問題。於是,本論文運用平面型微帶線設計雙頻枝幹耦合器,達成900MHz及2.4GHz雙頻效果,並以平衡式放大器在輸入與輸出端同時使用該雙頻枝幹耦合器,達到寬頻、系統備援,甚至不需考慮匹配網路的目的。此外,利用縮小化技術,除維持傳統雙頻枝幹耦合器性能外,更縮小其使用面積達傳統型的60%以上。由於雙頻枝幹耦合器以印刷電路製作完成,具單一平面且一次完成的優點,加上不需跳線也不需鑽孔,更適用於MIC及MMIC之導入整合設計應用,極具參考價值。
微型化雙頻枝幹耦合器設計後,經實作驗證獲得結果為:(900MHz)S11=-15.9dB、S21=-3.2dB、S31=-4.3dB、S41=-22.7dB;(2.4GHz)S11=-22.9dB、S21=-3.8dB、S31=-3.9dB、S41=-24.7dB。而平衡式放大器則刻意於放大器電路未實施匹配網路下,於輸入及輸出端使用前述之雙頻枝幹耦合器,經實作驗證獲得結果為:(900MHz)Gain=15.5dB、(2.4GHz)Gain=15dB ,獲致極佳的增益特性!
In communication industry, there has been a growing trend towards wideband and dual-band. The coupler device used in microwave circuit plays an important role in communication. The Hybrid Right/Left-Handed transmission line is of the first important in applications of traditional dual-band coupler. However, this architecture is more complex and expensive in implementation. Mixed microstrip line and lump elements, will produce the issue of dispersive effect in higher frequency, and it will never get rid of the problem of complexity and cost. Thus, this thesis applies planar microstrip line to design a dual-band branch-line coupler to achieve dual-band effect of 900MHz and 2.4GHz. Moreover, we make use of the balance amplifier between this two coupler to reach wideband, system backup, even that we get the purpose of dispensable match network. Utilizing miniaturized technology, it achieves the performance of traditional dual-band branch-line coupler. Besides, it reduced the area of traditional dual-band branch-line coupler up to 60%. Dual-band branch-line coupler was completed by printed circuit, it has the merit of single planar and one-time implementation. Additionally it doesn’t need jump-line and punctures, especially suitable for use in the integrated application of MIC and MMIC.
The miniature of dual-band branch-line coupler was designed, and we obtained the verified results as follows: (900MHz) S11=-15.9dB, S21=-3.2dB,S31=-4.3dB,S41=-22.7dB;(2.4GHz)S11=-22.9dB,S21=-3.8dB,S31=-3.9dB,S41=-24.7dB. The balanced amplifier was not tuned to match network sedulously and the afore dual-band branch-line coupler was used at input and output ports. We obtained the verified results as follows:(900MHz)Gain=15.5dB,(2.4GHz)Gain=15dB. It achieved good characteristics of gain.
摘 要 i
Abstract ii
誌 謝 iv
目 錄 v
圖目錄 viii
表目錄 xi
第一章 緒論 1
1.1 研究動機 1
1.2 研究方法與步驟 2
1.3 論文架構 4
第二章 微帶線基本理論 6
2.1 微帶線基本公式 6
2.2 視為電路元件的傳輸線 10
2.3 微帶線的不連續性 19
第三章 雙頻枝幹耦合器原理與設計 22
3.1傳統枝幹耦合器 23
3.2雙頻枝幹耦合器 30
第四章 雙頻枝幹耦合器微型化設計 41
4.1 微型化枝幹耦合器技術 41
4.2 微帶線不連續電路的補償 49
第五章 雙頻帶平衡式放大器架構及特性 52
5.1 寬頻放大器(Broadband Amplifier) 52
5.2 平衡式放大器(Balance Amplifier) 53
5.3 平衡式放大器主動電路設計 55
5.4 微型化枝幹耦合器之雙頻帶平衡式放大器總成 58
第六章 結論 62
參考文獻 63
作者簡介 67
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