臺灣博碩士論文加值系統

本論文是針對寬頻及雙頻天線特性進行分析與探討，其中包含了微帶線饋入印刷槽孔以及共面波導單極饋入兩種方式的天線。在微帶線饋入印刷槽孔天線中，天線饋入方式是由平面印刷微帶線饋入後加上一個銅片彎折而成的立體微帶線所組合而成，主要以立體微帶線產生多種共振模態來達到寬頻的特性，並觀察不同形狀的立體微帶線對天線的頻率所造成的影響，而在這個系列的天線中能達到的最大阻抗頻寬為 55%左右。
另一個天線則是使用共面波導單極饋入方式，此天線主要以共面波導單極饋入加上平面三角微帶環的方式來達到雙頻的效果，並改變三角環迴路等參數來觀察對頻率造成的影響，在這個天線所達到的雙頻效果中，低頻模態可達到 35%左右的阻抗頻寬，而高頻模態可達到 25%左右的阻抗頻寬。
本論文除了針對天線阻抗頻寬做一系列分析與討論外，也對天線的輻射場形及增益部份的特性做量測，並將分析與比較。

The designs of the antennas for broadband and dual-band characteristic have been investigated in this paper. The major topics of this paper include the printed slot of microstrip-line-fed antenna and the coplanar waveguide (CPW) fed antenna. The printed microstrip-line-fed slot antenna consists of a printed microstrip-line-fed adding one copper slice bend, a three-dimensional microstrip-line structure. For the feature of three-dimensional microstrip-line slot antenna generates several resonant modes to reach broadband, then we observe various three-dimensional microstrip-line forms that caused broadband operation of the antenna. In the series, maximum impedance bandwidth of the proposed antenna can achieve 55%.
The second proposed antenna adopts CPW feed. Due to added a triangle microstrip-loop leading to dual-band operation, and trim the triangle microstrip-loop parameters to observe the performances of the proposed antenna. The proposed antenna generates the dual-band operation that the impedance bandwidth of the low band can achieve 35% and high band can achieve 25%.
In this paper we not only investigate the impedance bandwidth of the antenna, but also radiation patterns and gain.

摘 要 i
Abstract ii
致 謝 iii
目 次 iv
表 目 錄 v
圖 目 錄 vi
第一章 序論 1
1.1 簡介 1
1.2 內容提要 1
第二章 立體微帶線饋入印刷矩形槽孔天線設計 3
2.1 概述 3
2.2 天線設計 4
2.3 實驗結果討論 7
2.3.1 平面式微帶線饋入印刷矩形槽孔天線 7
2.3.2 加入立體結構的微帶線饋入印刷矩形槽孔天線 13
第三章 雙寬頻段之共面波導式平面三角環形天線設計 31
3.1 概述 31
3.2 天線設計 32
3.3 實驗結果討論 34
第四章 結 論 56
參考文獻 58

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