本論文主要在探討正交調制器的設計，包括以混合式元件形式配合印刷電路板製程技術製作而應用於數位訊號產生器的120MHz正交調制器以及以GaAs HBT製程技術製作而應用於PCS頻段無線通訊系統的正交調制器MMIC。120MHz正交調制器的電路製作包括功率分配/結合器、90度相位偏移器、雙平衡混波器，論文中詳盡地說明各電路的設計架構與原理以及實際地量測結果，而後將各電路組合而成一正交調制器並予以嚴密的規格測試，並與Agilent ESG-D系列數位訊號產生器之相同載波頻率數位調制規格做比較。PCS頻段正交調制器MMIC的電路設計包含90度相位偏移器、吉伯細胞混波器、差動-單端轉換器以及輸出端射頻放大器，論文中詳盡地說明各電路的設計架構與原理以及模擬結果，而後將各電路整合成一正交調制器並予以整體的分析與嚴密的參數模擬。針對正交調制器繁瑣的規格測試，本論文也詳細地敘述整個正交調制器完整的測試方法、架構與儀器設置。

This thesis researchs the design of quadrature modulator consists of 120MHz quadrature modulator that is fabricated using hybrid elements and print circuit board (PCB) technology for digital signal generator and quadrature modulator monolithic-microwave integrated-circuit (MMIC) that is fabricated using GaAs heterojunction bipolar transistor (HBT) technology for Personal Communication Service (PCS) applications. The 120MHz quadrature modulator incorporates power divider/combiner, phase shifter and doubly balanced mixer; the design architecture, principle and measurement results of division are presented in this thesis. A quadrature modulator is implemented by combining every division and measures specifications accurately, comparing with that of Agilent ESG-D series digital signal generator with the same carrier frequency and digital modulation. The quadrature modulator MMIC for PCS applications incorporates phase shifter, Gilbert cell mixer, differential to single-ended converter and RF amplifier
at output; the design architecture, principle and simulation results of division are presented in this thesis. A quadrature modulator is integrated by combining every division and simulates parameters strictly.For troublesome specification measurement of quadrature modulator, this thesis also presents measurement method and instrument setup detailedly.

論文提要 I
目錄 II
圖表目錄 IV
第一章 緒論 1
第二章 120MHz正交調制器 5
2-1 架構簡介 5
2-2 功率分配/結合器 6
2-2-1 設計原理 6
2-2-2 電路設計 7
2-2-3 實作與量測結果 9
2-3 90度相位偏移器 11
2-3-1 設計原理 11
2-3-2 電路設計 14
2-3-3 實作與量測結果 16
2-4 雙平衡混波器 18
2-4-1 設計原理 18
2-4-2 電路設計 20
2-4-3 實作與量測結果 22
2-5 正交調制器之整合與規格測試 31
2-5-1 電路整合 31
2-5-2 測試方法 32
2-5-3 實作與量測結果 38
2-6 Agilent ESG-D系列訊號產生器的數位調制功能 48
第三章 正交調制器MMIC 51
3-1 架構簡介 52
3-2 偏壓電路 53
3-3 90度相位偏移器之分析與設計 54
3-4 吉伯細胞混波器之分析與設計 58
3-4-1 設計原理 58
3-4-2 電路設計與模擬結果 61
3-5 差動-單端轉換器之分析與設計 65
3-6 射頻放大器之分析與設計 67
3-7 正交調制器之整體分析與設計 70
3-7-1 電路整合與模擬結果 71
3-7-2 電路佈局 75
3-7-3 晶片測試 76
第四章 結論 77
參考文獻 78

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