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研究生:黃仕昕
研究生(外文):Shih-Sin Huang
論文名稱:具並聯式功率結合器之多模功率放大器
論文名稱(外文):A Multi-Mode Power Amplifier Using Parallel Power Combining Structure
指導教授:毛紹綱
口試委員:湯敬文鍾世忠郭仁財王暉
口試日期:2012-07-25
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:電腦與通訊研究所
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:2012
畢業學年度:100
語文別:中文
論文頁數:65
中文關鍵詞:金氧半場效電晶體功率放大器功率結合變壓器並聯式功率結合器多模功率放大器
外文關鍵詞:CMOS Power AmplifierPower Combining TransformerPower Combining StructureMulti-Mode Power Amplifier
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  • 被引用被引用:1
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本論文提出應用於1.9 GHz之多模功率放大器,並利用並聯式功率結合變壓器提升輸出功率。電路架構採用兩級串接型式放大電路,分別為驅動級與功率級,兩級皆採用疊接差動電路架構,以改善CMOS電晶體崩潰電壓過低之問題。折衷於線性度和效率,驅動級與功率級的偏壓點皆操作在AB類。本多模功率放大器提供三種運作模式,分別為高功率模式(high-power mode; HPM)、中等功率模式(medium-power mode; MPM)、低功率模式(low-power mode; LPM),切換方式藉由切換功率單元(power cell)的數目,不需要額外的開關電路,可節省更多的晶片面積及成本。偏壓電路採用調節式偏壓電路,減少功率放大器之AM-AM失真以獲得線性度的改善。量測的小訊號增益在三個模態下分別為 20.9 dB、10.7 dB和6.35dB,在1-dB增益壓縮點下的輸出功率分別為 21.8 dBm 、14.4 dBm和 8.3 dBm。

This thesis proposed a 1.9 GHz multi-mode power amplifier using power combining transformer to increase output power. The power amplifier with parallel power combining transformer is designed by the driver and power stage in cascade configurations. To enhance breakdown voltage of CMOS transistor, the cascode configuration is used for driver and power stage, and where the class-AB biased point is chosen to compromise efficiency and linearity. Three operation modes, high-power, medium-power, and low-power modes, can be switching by changing the power-cell number, and this method can save the chip size and cost since no switch circuit is required. To enhance the linearity, the adaptive bias circuit is used for biasing power amplifier. For high-power, medium-power, and low-power modes, the measured small-signal gains are 20.9 dB, 10.7 dB, 6.3 dB, and the measured output 1-dB compressed powers are 21.8 dBm, 14.4 dBm, and 8.3 dBm, respectively.

中文摘要 i
英文摘要 ii
誌謝 iii
目錄 v
表目錄 vii
圖目錄 viii
第一章 緒論 1
1.1 研究動機 1
1.2 章節結構 3
第二章 功率放大器介紹 4
2.1功率放大器重要參數 4
2.1.1 散射參數 5
2.1.2 線性度 6
2.1.3 一分貝增益壓縮點 7
2.1.4 三階交互調變失真 8
2.1.5 三階截斷點 9
2.1.6 鄰近通道功率比 10
2.1.7 誤差向量振幅 11
2.1.8 效率 12
2.1.9 穩定度 13
第三章 功率放大器類別 15
3.1 放大模式功率放大器 15
3.1.1 A類放大器 16
3.1.2 B類放大器 17
3.1.3 AB類放大器 19
3.1.4 C類放大器 20
3.2 開關模式功率放大器 21
3.2.1 D類放大器 22
3.2.2 E類放大器 23
3.2.3 F類放大器 25
第四章 具並聯式功率結合器多模功率放大器設計 27
4.1 功率結合變壓器簡介與文獻回顧 27
4.2 多模功率放大器介紹與文獻回顧 32
4.3 電路架構說明 36
4.4 電路設計流程 43
4.5 量測考量 44
4.5.1 測試板 44
4.5.2 小訊號量測 45
4.5.3 大訊號量測 45
4.6 模擬與量測結果 46
第五章 結論 61
參考文獻 62


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