本論文主要是研究寬頻雙極化平板天線，先以H形耦合槽孔之寬頻雙極化平板天線為出發點，著重於如何設計出具有良好隔離度(< –30 dB)的寬頻雙極化平板天線，對雙極化平板天線提出一系列的完整研究報告。在本論文中一共探討了以下四個主題：第一種設計為一種具有改良H形耦合槽孔之寬頻雙極化平板天線；第二種設計為一種具有最佳隔離度的雙H形耦合槽孔之寬頻平板天線設計；第三種設計為一種具有十字形槽縫縮小化雙極化平板天線設計；第四種設計為兩種適合應用於DCS基地台之混合式饋入雙極化平板天線設計。

Several broadband dual-polarized patch antenna designs are presented and studied. Good isolation (< –30 dB) between the two feeding ports of the proposed broadband dual-polarized patch antenna has been obtained. This dissertation reports four different innovative designs. Firstly, a new design of the aperture-coupled patch antenna with modified H-shaped coupling slots for achieving dual-polarized radiation with high isolation over a wide bandwidth is studied. Secondly, Optimized feeding of the dual-polarized aperture-coupled patch antenna with H-shaped coupling slots for achieving highly decoupled feeding ports is experimentally investigated. Thirdly, an aperture-coupled patch antenna with a cross slot for compact dual-polarized operation in the 1800-MHz band suitable for applications in personal communication system is presented. Finally, new designs of the broadband dual-polarized patch antenna with hybrid feeds suitable for DCS base-station application are proposed.

文字目錄…………………………………………i
圖形目錄 ………………………………………iv
表格目錄 ……………………………………xvii

第一章 序論 (Introduction) ……………1

1.1 概述 …………………………………… 1
1.2 文獻導覽 ……………………………… 1
1.3 內容提要 ……………………………… 2

第二章 改良H形耦合槽孔之寬頻雙極化平板天線

(Dual-Polarized Aperture-Coupled Patch Antennas
with Modified H-Shaped Coupling Slots).5

2.1 概述………………………………………5
2.2 各類耦合槽孔天線結構說明……………6
2.3 一種具有改良H形耦合槽孔
之寬頻雙極化寬頻平板天線…………………11
2.4 饋入網路介紹……………………………18
2.5 一種包含饋入網路且具有改良H形耦合槽孔
的雙極化寬頻平板天線………………………23
2.6 心得與討論………………………………31

第三章 具有最佳隔離度的雙H形耦合槽孔之寬頻
雙極化平板天線
(Optimized Feeding of Dual-Polarized Aperture-Coupled Patch Antennas with H-Shaped Coupling Slots) ……………………………………… 32

3.1 概述………………………………………32
3.2 雙H形耦合槽孔之A類設計………………33
3.3 雙H形耦合槽孔之B類設計………………44
3.4 雙H形耦合槽孔之C類設計………………52
3.5 心得與討論………………………………60

第四章 縮小化雙極化平板天線
(Compact Dual-Polarized Patch Antennas)…………………………………………………62

4.1 概述 …………………………………… 62
4.2 縮小化技術說明…………………………62
4.3 使用具有槽孔的接地面之縮小化
雙極化微帶線…………………………………87
4.4 使用具有十字形槽孔的輻射金屬片之縮小化雙極化平板天線 ……………………………………91
4.5 心得與討論………………………………99

第五章 使用混合式饋入之雙極化平板天線
(Dual-Polarized Patch Antennas with Hybrid Feeds) ………………………………………100

5.1 概述………………………………………101
5.2 一種具有L形接地面的雙極化平板天線.101
5.3 一種具有間隙耦合與槽孔耦合饋入
之寬頻雙極化平板天線 ……………………112
5.4 其它使用混合式雙饋入的雙極化平板天線120

第六章 結論 (Conclusions) …………123

參考文獻 (References) ………………… 126

附錄A 論文著作表 (Publication List).130

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