臺灣博碩士論文加值系統

隨著全球電信自由化的腳步加快，使得無線通訊技術不斷的提昇、在整個射頻電路中，混波器份演著非常重要的角色。本文章主要在設計各種不同的混波器，在第四章中提出一個全新的自我共振混波器與第三章的雙平衡式混波器做一比較，其中模擬的轉換增益約為5dB，而各訊號的隔絕度大約都在65dB以上。第五章則是提出一個新架構的鏡像拒斥混波器，量測的轉換損耗為15dB、鏡頻拒斥為30dB、另外本地振盪對射頻端的訊號隔絕度也達到30dB。

The technology of wireless communication is developing with the fast steps of global telecommunication industry. In this technology, mixer plays a very important role in integrated RF circuit. This thesis focuses on various mixer designs.
A novel self-resonant mixer in Chapter 4 is proposed and compared with the double-balanced one in Chapter 3. The transformation gain of the self-resonant mixer is about 5 dB and its signal isolation is above 65 dB in simulation results.
In Chapter 5, a novel image-rejection mixer is presented. Its transformation loss is 15 dB, image-rejection is about 30 dB and the isolation between radio and intermediate frequency reaches to 30dB.

指導教授推薦書…………………………………………………………………
口試委員會審定書………………………………………………………………
授權書……………………………………………………………………………. iii
簽署人須知………………………………………………………………………. iv
中文摘要…………………………………………………………………………. v
英文摘要………………………………………………………………………… vii
誌謝……………………………………………………………………………… ix
第一章 簡介……………………………………………………………………. 1
1.1 相關背景…………………………………………………………… 1
1.2 論文架構………………………………………………………...… 2
第二章 接收器系統架構……...………………………………………………. 3
2.1 接收器架構種類.………………………………………………… 4
2.1.1 超外差式架構…………..…………………………………… 4
2.1.2 直接移頻式換架構……………………………………...… 8
2.1.3 低中頻式換架構……...…………………………………...… 10
2.1.4 鏡像消除式架構………………………………...................... 12
2.1.3.1 Hartley架構……………………………………….…… 12
2.1.3.2 Weaver架構……………………………………...……. 14
2.2 接收器的主要設計參數…………………………………………… 18
1.增益………………………………………………….……… 18
2.穩定度考量……………………………………………… 19
3.雜訊指數…………………………………………………….. 21
4.轉換增益…………………………………………..………… 22
5.1dB壓縮點…………………………………………………... 23
6.輸入端三階交叉點……………………………………….. 27
第三章 2.4GHz 互補式金氧半雙平衡式吉爾伯混波器…………. 28
3.1 互補式金氧半雙平衡式吉爾伯混波器原理………………….. 28
3.2 設計雙平衡式混波器之概念………………………….…………... 30
3.3 雙平衡式吉爾伯混波器之設計與模擬…………………………. 33
3.5 量測環境與特性量測與討論……………………………………… 37
第四章 應用在IEEE802.11a自我共振混波器………………………………. 38
4.1 架構簡介與原理………..…………………….……………………. 38
4.2 自我共振混波器之設計與電路佈局……………………………... 41
4.3 自我共振混波器模擬結果……………………………………….... 43
4.4 量測環境與結果討論……………………………………………… 47
第五章 雙平衡式鏡像拒斥混波器……...……………………………………. 48
5.1 鏡頻拒斥混波器的原理與架構……...……………………………. 48
5.2 次電路設計與實現…………………..…………………………….. 52
5.2.1 低通耦合器………………………………………………….. 52
5.2.2 高通耦合器………………………………………………….. 54
5.2.3 本地振盪器巴倫…………………………………………….. 57
5.3雙平衡式鏡頻拒斥混波器之設計 …………………………..….. 60
5.4 電路量測與討論…………………………………………………… 62
第六章 結論…………………………………………………………………… 66
參考文獻…………………………………………………………………….…… 68

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