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研究生:林軒頎
研究生(外文):Syuan-Ci Lin
論文名稱:小型超寬頻天線之設計與研究
論文名稱(外文):Design and Study of Compact Ultra-Wideband Antennas
指導教授:孫卓勳孫卓勳引用關係
指導教授(外文):Jwo-Shiun Sun
口試委員:莊清松程光蛟賴柏洲
口試委員(外文):Ching-Song ChuangKwong-Kau TiongPo-Chou Lai
口試日期:2006-06-08
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:電腦與通訊研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:93
中文關鍵詞:超寬頻天線圓盤型單極天線半橢圓形天線漸進式槽孔天線
外文關鍵詞:Ultra-Wideband AntennaCircular Disc Monopole AntennaHalf-elliptic Monopole AntennaTapered Slot AntennaSmall AntennaFractal Antenna
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本論文中提出可應用在WiFi、WiMax、UWB頻段的超寬頻天線,首先是對圓盤型單極天線進行改良,藉著使用半橢圓與改變接地面的方式,再採用共平面波導的饋入方式,不但達到超寬頻的效果,更將原本的圓盤型單極天線縮小化。
第二部份則是採用圓盤型單極天線的原型,在圓盤的內部製造向內遞迴式碎形,藉著碎形天線的多重頻帶效果,將原本圓盤型單極天線頻寬不足的部份加以改善,接著又對碎形相關係數進行微調與探討,進而達到超寬頻天線的要求。
第三部份則為對先前實驗室設計過的天線進行改良,首先將原本不對稱的結構改良成對稱型,接著利用漸進式槽孔來增大頻寬,再使用共平面波導饋入的方式,使天線製程簡單且成本低廉,以期能符合商業化的要求。
In this study, the ultra-wideband antennas for Wi-Fi, WiMax and UWB communication system applications are proposed. First, we change circular disc monopole antenna to half-elliptic and change antenna’s ground plane, and we use the CPW as a feeding structure. We can not only achieve ultra-wide bandwidth but also reduce the size of the antenna.
The second part of this study, we dig fractal holes on circular disc monopole antenna in order to achieve ultra-wide bandwidth, and optimal the size and pattern of the antenna.
Third, we change the asymmetric loop ultra-wideband antenna to symmetric slot antenna. Moreover, we use tapered slot and CPW-fed form to increase the antenna bandwidth. By using above design, we can design the antenna in more simple and cheaper form.
中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 概述 1
1.2 研究動機與背景 2
1.3 超寬頻系統簡介 3
1.4 論文概述 13
第二章 共平面波導饋入之超寬頻單極天線 15
2.1 超寬頻單極天線簡介 15
2.2 共平面波導饋入之超寬頻半橢圓形單極天線 19
2.2.1 共平面波導饋入之超寬頻半橢圓形單極天線設計 21
2.3 相關參數探討 25
2.3.1 改變接地面高度L 25
2.3.2 改變天線輻射主體與接地面高度G高度 26
2.3.3 改變接地面寬度W 27
2.4 結果與討論 29
第三章 共平面波導饋入之超寬頻碎形天線 39
3.1 碎形天線原理與特性概述 39
3.2 共平面波導饋入之超寬頻蓮蓬狀碎形天線 48
3.2.1 共平面波導饋入之超寬頻蓮蓬狀碎形天線設計 48
3.3 碎形天線相關係數討論 50
3.3.1 改變碎形天線半徑R與G 50
3.3.2 改變碎形天線階數 52
3.3.3 改變碎形的個數 53
3.4 結果與討論 57
第四章 共平面波導饋入之超寬頻槽孔天線 67
4.1 槽孔天線 67
4.1.1 窄槽孔天線 69
4.1.2 寬槽孔天線 70
4.1.3 漸進式槽孔天線 72
4.1.4 超寬頻半環形天線 76
4.2 共平面波導饋入之超寬頻眉毛形槽孔天線 77
4.2.1 共平面波導饋入之超寬頻眉毛形槽孔天線設計 77
4.3 結果與討論 80
第五章 結論 90
參考文獻 91
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