在論文中，主要將使用平面天線來進行超寬頻天線設計，除了在超寬頻天線性能上的研究之外，也朝向利用這些超寬頻天線良好的特性來作應用設計，包含操作在無線都會網路WMAN的橋接點天線、全向性水平輻射的全球微波存取互通介面WiMAX橋接點天線以及具有帶拒頻帶操作的超寬頻UWB通訊系統天線等。在一開始在第二章中，分別提出接地面大小以及非對稱接地面效應對於超寬頻天線性能的影響。緊接著由所得到的結果，提出並分析可應用在無線都會網路WMAN的橋接點天線設計，以及適用在USB隨插即用無線網卡裝置上的全向性單極天線。另外，藉由了解超寬頻天線輻射特性與天線寬度之間的關係，可以得到達成全向性水平輻射的設計準則。在第三章中，提出幾個在超寬頻全頻帶內在水平方向上可得到良好的全向性輻射(增益變化量小於3 dB)的橋接點天線設計，其中包含增加可全向性輻射操作頻率的方法。最後，為了抑制超寬頻通訊系統與無線區域網路WLAN之間的訊號干擾，帶拒頻帶操作的技術也可應用在超寬頻天線設計上，具有帶拒頻帶之超寬頻天線設計予以提出。

The studies in this dissertation mainly utilize planar antennas for ultra-wideband antenna designs not only on the investigation of antenna performance but also towards exploiting attractive features of ultra-wideband antennas for practical applications, such as WMAN access-point antennas, omnidirectional WiMAX access-point antennas, band-notched UWB (Ultra-wideband, 3.1 ~ 10.6 GHz) antennas, and so on. To begin with, the effects of the ground-plane size and the asymmetrical ground plane on ultra-wideband antennas are studied in Chapter 2. Following up, from the conclusive results, an antenna for WMAN operation in access-point applications and an omnidirectional monopole for USB wireless network card device are proposed and analyzed. Characteristics of ultra-wideband antenna radiation in relation to the antenna's width for obtaining omnidirectional radiation are addressed. In Chapter 3, several ultra-wideband access-point antennas are presented for achieving good omnidirectional radiation in the azimuthal plane across the bandwidth. Furthermore, in Chapter 4, band-notching techniques are applied to ultra-wideband antennas for avoiding the interference between the UWB and the WLAN systems.

文字目錄 ........................................ i
圖形目錄 ...................................... iii

第一章 序論 (Introduction) .................................. 1
1.1 概述 ........................................ 1
1.2 文獻導覽 .................................... 2
1.3 內容提要 .................................... 4

第二章 超寬頻金屬片天線特性研究與應用設計 (Characteristics and Application Designs of Ultra-Wideband Antennas) ....................................... 7
2.1 接地面大小對於超寬頻天線性能影響 ............ 9
2.1.1 天線設計 .................................. 9
2.1.2 實驗結果與分析討論 ....................... 10
2.2 無線都會網路方形金屬片天線設計 ............. 22
2.2.1 天線設計 ................................. 22
2.2.2 實驗結果與分析討論 ....................... 23
2.3 超寬頻USB無線網卡天線設計 .................. 39
2.3.1 天線設計 ................................. 39
2.3.2 實驗結果與分析討論 ....................... 40

第三章 全向性水平輻射超寬頻橋接點單極天線設計 (Omnidirectional Ultra-Wideband Monopole Antennas for Access Points) ................................. 46
3.1 步階式矩形金屬片天線設計 ................... 48
3.1.1 天線設計 ................................. 48
3.1.2 實驗結果與分析討論 ....................... 58
3.2 U形金屬片天線設計 .......................... 65
3.2.1 天線設計 ................................. 66
3.2.2 實驗結果與分析討論 ....................... 68
3.3 方形柱狀金屬片天線設計 ..................... 81
3.4 多片式金屬片天線設計 ....................... 85

第四章 具有帶拒頻帶之超寬頻平面天線設計 (Band-Notched Ultra- Wideband Planar Antennas) ...................................... 89
4.1截角式方形金屬片天線設計 .................... 91
4.1.1 天線設計 ............................................. 91
4.1.2 實驗結果與分析討論 ....................... 93
4.2 縮小化圓形金屬片天線設計 .................. 106
4.2.1 天線設計 ................................ 106
4.2.2 實驗結果與分析討論 ...................... 108
4.3 縮小化印刷式寬槽孔天線設計 ................ 115
4.3.1 天線設計 ................................ 116
4.3.2 實驗結果與分析討論 ...................... 122
4.4 縮小化印刷式準偶極天線設計 ................ 128
4.4.1 天線設計 ................................ 129
4.4.2 實驗結果與分析討論 ...................... 134
4.5 其他相關天線設計 .......................... 143

第五章 結論 (Conclusion) ...................... 148

參考文獻 (References) ......................... 149

附錄A 著作表 (Publication List) ............... 157

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