臺灣博碩士論文加值系統

本論文主要利用印刷式電路板設計應用於超寬頻系統(UWB)之天線設計，涵蓋頻段為3.1-10.6 GHz。首先在本論文中，先介紹超寬頻系統之發展與技術應用，接下來介紹本論文所研究與製作應用於UWB系統之橢圓偶極天線，主要發表兩種不同材質所製作的橢圓偶極天線，首先利用FR4板材介電係數4.2製作橢圓偶極天線，接著利用高介電係數10.2板材，依照相同的設計方式縮小天線的體積，研究與製作橢圓偶極天線之量測反射損耗(s11)、史密斯阻抗圖(smith chart)及場型圖(radiation patterns)，將會在本論文中詳細呈現。

Printed-circuit board (PCB) antenna with useful bandwidth covering from 3.1 GHz to 10.6 GHz is suitable for wireless ultra wideband (UWB) application. Firstly, we present UWB developed and application. Next, to present a low profile, elliptical antenna etched on PCB with dielectric constant 4.2 achieving the above specified bandwidth. And then, to reduce the size of the product, an elliptical dipole antenna with PCB dielectric constant 10.2 has been fabricated. Swept frequency return loss, impedance and radiation patterns of these antennas have been measured. Design criteria for this elliptical dipole antenna is also investigated.

目錄
摘要 i
ABSTRACT ii
誌謝 iii
目錄 iv
表目錄 vii
圖目錄 viii
第一章 導論 1
1.1 研究動機 1
1.2 論文大綱 2
第二章 超寬頻(Ultra-Wide Band UWB)系統技術 3
2.1 超寬頻系統簡介 3
2.2 UWB歷史 4
2.3 高傳輸量之UWB 6
2.4 UWB的好處 7
2.5 UWB技術與應用 10
2.5.1 UWB技術原理 11
2.5.2 頻帶分配 15
2.5.3 美國聯邦通訊委員會(Federal Communi-cations Commission，FCC)對UWB之規範 17
2.5.4 UWB應用 18
第三章 應用於超寬頻系統之天線設計 21
3.1 概述 21
3.2 近期發表印刷版式UWB天線文獻探討 22
3.2.1 A printed crescent patch antenna for ultrawideband applications 25
3.2.2 Differential and Single Ended Elliptical Antennas for 3.1-10.6 GHz Ultra Wideband Communication 29
3.2.3 Study of a Printed Circular Disc Monopole Antenna for UWB Systems 32
3.2.4 A Double-Sided Printed Y-Shaped Dipole Antenna for UWB Communications 36
3.3 本論文天線設計 39
3.3.1 UWB天線理論探討 40
3.3.1.1 impedance的探討 40
3.3.1.2 輻射場型的探討 42
3.3.2 介電係數(4.2)PCB天線設計 45
3.3.3 介電係數(4.2)PCB天線量測 46
3.3.3.1 FR4 impedance量測及模擬 47
3.3.3.2 FR4輻射場型(Radiation pattern)量測 50
3.3.3.3介電係數4.2 PCB天線心得與討論 52
3.3.4 高介電係數(10.2)PCB天線設計 53
3.3.5 高介電係數 (10.2) PCB天線量測 54
3.3.5.1高介電係數(10.2) impedance量測 55
3.3.5.2 介電係數10.2 PCB天線心得與討論 57
第四章 結論 58
參考文獻 59

參考文獻
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