臺灣博碩士論文加值系統

摘要：
本論文主要為研製可應用於電磁微振動感測系統之可調式相移器與I/Q降頻混頻器兩部分。在可調式相移器部份，進行三項新型架構的研究，第一，提出一個新的阻抗轉換反射式相移器架構，可以達到360°的相位調控範圍。量測結果於2 GHz頻率下，相位調控範圍可以達到407°，植入損耗為4.4±0.2 dB，輸入與輸出返回損耗皆大於19 dB。第二，提出只需單一反射負載的相移器，其使用威爾金森必v分配器，連接一個反射式負載即可完成相移器電路。量測結果於915 MHz頻率，在相位調控範圍180°需求下，植入損耗變化量只有1.6 dB，輸入與輸出返回損耗皆大於10 dB。第三，分別設計10-GHz與24-GHz雙並聯共振反射式相移器，提出一並接型反射式負載架構，並搭配使用集總元件之藍吉耦合器，在10-GHz雙並聯共振反射式相移器部分，量測結果於10 GHz頻率下，相位調控範圍有194°，植入損耗為5.1±0.2 dB，輸入與輸出返回損耗皆大於13 dB；在24-GHz雙並聯共振反射式相移器部分，量測結果於24 GHz頻率下，相位調控範圍有170°，植入損耗為5.2±0.4 dB，輸入與輸出返回損耗皆大於15 dB。第二部分設計具有主動平衡器之降頻混頻器電路，晶片內部包含I/Q兩路部分，電路架構採用主動式雙平衡混頻器，並結合具有回授機制之輸入單端轉雙端主動平衡器，量測結果於中頻訊號頻率為1 MHz之下，於本地振盪輸入訊號必v為-19 dBm時，最高差動輸出電壓轉換增益為24 dB，輸入1-dB增益壓縮點為-24 dBm，輸入二階截止點為26 dBm，輸出三階截止點為8.4 dBm，LO-RF的隔離度為43 dB。

Abstract：
This thesis investigates analog phase shifters and quadrature down mixer for electromagnetic micro-motion detection systems. On the analog phase shifter, a full 360° reflection-type hybrid phase shifter with constant insertion loss is first presented, which employs an impedance-transforming branch-line coupler with the series-resonated reflection loads. The measured results show a maximal relative phase shift of 407°, an insertion loss of 4.4±0.2 dB and return losses better than 19 dB at 2 GHz. Another CMOS reflection-type phase shifter requires only with single reflection load was presented, where Wilkinson power divider is used. The measured results at 915 MHz show an insertion-loss variation of 1.6 dB with 180° relative phase shift range, and the return losses are better than 10 dB. Third, the enhanced CMOS analog phase shifter at 10 and 24 GHz are presented, using the dual parallel-resonant structure with transformer-based Lange coupler. The measured results show a maximal relative phase shift of 194° and 170°, insertion loss of 5.1±0.2 dB and 5.2±0.4 dB, return loss better than 13 dB and 15 dB at 10 GHz and 24 GHz, respectively. The second part of this thesis designs CMOS quadrature down mixer with internal active balun. The proposed circuit uses the double-balanced Gilbert Cell mixer with single-to-differential active balun. With the intermediate frequency of 1 MHz and LO power of -19 dBm, the differential voltage gain of 24 dB, input 1-dB compression point of -24 dBm, input second-order intercept point of 26 dBm, output third-order intercept point of 8.4 dBm and LO-RF isolation of 43 dB are measured.

目錄：
第一章 緒論 1
1.1 研究背景與目的 1
1.2 論文綱要 4
第二章 低植入損耗變化之360°反射式相移器設計 7
2.1 反射式相移器介紹 7
2.2 文獻研究成果 9
2.3 電路架構與原理 10
2.4 電路設計流程 15
2.5 模擬與量測結果 17
2.6 結果討論 21
第三章 CMOS威爾金森單共振反射式相移器 23
3.1 文獻研究成果 23
3.2 電路架構與原理 24
3.3 電路設計流程 29
3.4 模擬與量測結果 32
3.5 結果討論 37
第四章 CMOS雙並聯共振反射式相移器 41
4.1 電路架構與原理 41
4.2 10-GHZ雙並聯共振反射式相移器 47
4.2.1 電路設計流程 47
4.2.2 模擬與量測結果 52
4.3 24-GHZ雙並聯共振反射式相移器 57
4.3.1 電路設計流程 57
4.3.2 模擬與量測結果 59
4.4 結果討論 63
第五章 具有主動平衡之CMOS降頻混頻器 65
5.1 降頻混頻器效能參數介紹 65
5.1.1 轉換增益 65
5.1.2 雜訊指數 66
5.1.3 增益壓縮 67
5.1.4 二階交互調變失真 67
5.1.5 三階交互調變失真 68
5.1.6 隔離度 69
5.2 電路架構與原理 69
5.3 電路設計流程 74
5.4 模擬與量測結果 77
5.5 結果討論 83
第六章 結論 85
參考文獻 87

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