臺灣博碩士論文加值系統

本文提出了利用微帶線饋入槽孔天線（slot antenna），來製做WiMAX頻段（3.4GHz至3.7GHz）的4X4槽孔陣列天線（slot array antenna）。將槽孔天線傾斜45度，使其4X4槽孔陣列天線的有兩個極化方向的輻射場，增強其抗干擾能力。採用並-串（parallel-series）聯饋送網路，縮短饋送路徑以減少能量損耗、整體陣列天線面積和在單位面積中能有著較多的槽孔天線個數。運用平面印刷電路技術在FR4基板上來製作4X4槽孔陣列天線且利用電磁模擬軟體HFSS模擬整個陣列天線結構，以降低成本和設計複雜度。
其量測結果顯示，在4X4槽孔陣列天線幅射場型上有高天線增益和窄的-3dB波束寬度。

In this thesis, a 4-by-4 two-dimensional slotted array antenna was designed, fabricated and measured. Such an array antenna consists of four series-fed sub-array antennas and a metal reflector for achieving single-side radiation. Moreover, the four sub-array antennas are fed by a 1-by-4 power divider made up of three 1-by2 power dividers. By the antenna theory, adjusting the progressive phase delay angle, the main beam angle can be steered toward any desired direction. In this research, the progressive phase delay angle is designed at 0 degree for obtaining the radiation main-beam toward broadside direction （perpendicular to the plan of slots）. Additionally, the slot inclines 45degree with respect to the micro-strip line for generating two polarized electric-field along two orthogonal directions. This may enhance the receiving performance in a complex environment. Due to the advantages of easy fabrication, robustness and low-cost issue, such an array antenna can be a potential candidate for serving a point-to point planar array antenna in WiMAX applications around 3.5GHz

第一章
緒論….……………………………………………………………………1
1.1 研究動機……………………………………………………………1
1.2 章節介紹……………………………………………………………2
第二章
饋送網路與陣列天線之介紹與設計……………………………………3
2.1 饋送網路之介紹與設計……………………………………………3
2.1.1 功率分配器介紹與設計………………………………………3
2.1.2 饋送方式介紹與設計…………………………………………7
2.2 陣列天線之介紹與設計……………………………………………9
2.2.1 ㄧ維陣列天線…………………………………………………9
2.2.2 二維陣列天線………………………………………………..10
第三章
功率分配器之設計原理與量測結果……………………………………12
3.1 背景回顧：功率分配器…………………………………………12
3.2 新型功率分配器設計與量測……………………………………14
3.2.1 新型功率分配器設計………………………………………14
3.2.2 新型功率分配器實做與量測………………………………15
3.3 改良環混成器設計與量測………………………………………17
3.3.1 改良環混成器設計…………………………………………17
3.3.2 改良環混成分配器實做與量測……………………………18
3.4 威爾金森（Wilkinson）功率分配器設計與量測………………21
3.4.1 威爾金森（Wilkinson）功率分配器設計……………………21
3.4.2 威爾金森（Wilkinson）功率分配器實做與量測…………21
3.5 一分二改良T接面功率分配器設計與量測………………………24
3.5.1 改良T接面功率分配器設計………………………………24
3.5.2 改良T接面功率分配器實做與量測………………………24
3.6 一分四改良T接面功率分配器……………………………………27
3.6.1 改良T接面功率分配器設計………………………………27
3.6.2 改良T接面功率分配器實做與量測………………………28
第四章
槽孔陣列天線之設計原理與量測結果…………………………………30
4.1 1X4槽孔陣列天線設計與量測……………………………………30
4.1.1 1X4槽孔陣列天線設計……………………………………30
4.1.2 1X4槽孔陣列天線實作與量測……………………………31
4.1.3 1X4槽孔陣列天線輻射場型量測…………………………33
4.2 4X4槽孔陣列天線設計……………………………………………36
4.3 4X4槽孔陣列天線實做與量測……………………………………38
4.3.1 無加裝反射板輻射場型量測………………………………39
4.3.2 距離天線背面1公分加裝反射板輻射場型量測…………43
4.3.3 距離天線背面2公分加裝反射板輻射場型量測…………47
第五章
結論………………………………………………………………………53
參考文獻……………………………54

參考文獻
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