臺灣博碩士論文加值系統

在本論文中，我們設計了操作在5GHz無線區域網路的印刷式偶極天線，並加上雙面直角反射器。阻抗的匹配是採用四分之ㄧ波長轉換器。為了驗證模擬結果，採用Duroid RO4003的板材實作，量測5GHz~6GHz的增益和反射損耗，都能夠達到所需要的。此外，天線的HPBW也滿足了設計目標。

In this thesis, printed dipole arrays with corner reflector fed by microstrip and twin line are designed at 5GHz for WLAN system application. The quarter-wavelength transformer is used for impedance matching. For verification, prototypes are implemented and measured at 5~6GHz with Duroid RO4003 PCB. Results show that good gain spectrum and impedance matching are obtained. In addition, the HPBW of the radiation pattern meets the design goal.

第一章 簡介 1
1.1 研究動機與背景 1
1.2 無線區域網路的介紹 2
1.3 IEEE802.11a和b的介紹 4

第二章 印刷式偶極天線 6
2.1 序言 6
2.2單一個印刷式偶極天線的模擬結果 7

第三章 提高增益的方法 10
3.1 序言 10
3.2 平面陣列天線 11
3.3 反射器 12
3.3.1 平面反射器 13
3.3.2 雙面直角反射器 14

第四章 指向性印刷式偶極天線 27
4.1 序言 27
4.1.1 智慧型天線的種類 27
4.1.2 文獻回顧 28
4.1.3 設計目摽 32
4.2 平行線饋入的指向性印刷式偶極天線 33
4.2.1 平行線的介紹 33
4.2.2 使用雙面直角反射器的偶極天線陣列 34
4.3微帶線饋入的指向性印刷式偶極天線 41
4.3.1初始設計的量測與模擬結果 41
4.3.2增益頻譜的改善 48

第五章 結論 56
參考文獻 58

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