臺灣博碩士論文加值系統

在本論文中主要是提出適用於超寬頻印刷式單極天線設計，並且針對所提出的天線特性去做分析與探討。本論文中所設計的印刷式單極天線分別採用共面波導饋入及微帶線饋入兩種方式，其天線結構形狀皆採用愛心形狀，而愛心形狀單極天線是由一個大半圓和兩個小半圓所組成。首先所提到的共面波導饋入印刷愛心形狀天線之超寬頻頻帶操作設計，適當的間隙距離也是重要變數，而此間隙距離會影響天線阻抗匹配，使得此天線阻抗頻寬可達137%，且具有超寬頻、良好增益與輻射場形等優點。接下來提出在愛心形狀結構上挖環形槽孔抑制5.15GHz~5.825GHz頻段。最後提出微帶線饋入愛心形狀結構天線，其頻寬也達到超寬頻效果，且此天線阻抗頻寬可達131%。本論文除了針對天線設計能符合在規定的頻帶範圍之外，也顯示出天線良好輻射場形及增益。

In this paper, the designs and characteristics of printed monopole antenna for ultra-wideband applications are proposed and investigated. In the context, the designs of printed antennas adopt the feed structure of microstrip-line-feed and coplanar-waveguide feed, and the configuration of the proposed antennas is heart shape. A shape of the heart monopole antenna consists of a big half-disk and two small half-disks. In the first instance the CPW fed printed heart antenna for ultra-wideband applications, the fitting feed gap is key parameter, which due to the sensitivity of the impedance matching. As a result of the structure, the impedance bandwidth of the proposed antenna can achieve 137% and have the advantages of ultra-wideband, good antenna gain and good radiation pattern. In the next instance we propose the printed heart antenna with a ring-section slot that reject the 5.15 to 5.825 GHz frequency band. In the final instance we propose the microstrip-line-feed printed heart antenna that can also achieve the requirement of the ultra-wideband application. And the impedance bandwidth of the proposed antenna can achieve 131%. The antenna performance we design not only fit the regular frequency band, but also show good radiation pattern and gain.

摘 要
ABSTRACT
致 謝
目 次
表 目 錄
圖 目 錄
第一章 序論
1.1 簡介
1.2 論文內容提要
第二章 共面波導饋入印刷愛心形狀超寬頻天線設計
2.1 簡述
2.2 天線設計說明
2.2.1 超寬頻天線簡介
2.2.2 共面波導饋入結構設計
2.3 天線實驗結果與討論
第三章 帶拒共面波導饋入印刷愛心形狀天線設計
3.1 簡述
3.2 天線設計說明
3.3 天線實驗結果與討論
第四章 微帶線饋入印刷愛心形狀超寬頻天線設計
4.1 簡述
4.2 天線設計說明
4.2.1 微帶天線簡介
4.2.2 微帶線饋入結構設計
4.3 天線實驗結果與討論
第五章 結 論
參考文獻

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