本論文中提出兩種低姿勢平面LTE/WWAN平板通訊裝置天線設計及其實作研究。第一種天線設計設置於接地面之角落淨空區，天線尺寸為57.5 x 6.5 x 0.8 mm3，利用在環圈結構上置入缺口，將其天線結構轉換成雙支路單極天線，並搭配匹配電路，達成平面化低姿態之特點以更適用於窄邊框平板通訊裝置，接著將此天線設計運用至雙天線陣列之操作，針對其相關配置及重要參數進行探討；最後，針對窄邊框結構，提出另一種低姿勢天線設計，設置於接地面的單一側邊，尺寸為55 x 10 x 0.8 mm3，其結構亦為一具有缺口的環圈結構，將缺口與天線饋入點設置在環圈結構的同一側來分配共振路徑長度和降低天線結構與接地面間的耦合。本論文所提出之天線設計均可適用於704~960及1710~2690 MHz之LTE/WWAN操作。

In this thesis, two low-profile planar LTE/WWAN antennas for tablet communication devices are presented. The first antenna is disposed around a ground corner, and the antenna size is 57.5 x 6.5 x 0.8 mm3 only. By embedding an opening in a loop strip, it can be transformed into a dual-branch monopole antenna. By aided with a matching circuit, the antenna can provide two wide operation bands with a planar, low-profile structure, making it promising for applications in modern slim tablet communication devices with a narrow frame. The proposed antenna applied to form a two-antenna array is also studied. A second low-profile planar antenna to be employed along an edge of the tablet device system ground plane is also presented. The second antenna is also a loop strip having an opening, sized 55 x 10 x 0.8 mm3. In the second structure, the opening and the feeding point of the antenna are arranged to be at the same edge of loop strip, which allows the antenna to have two wide operating bands with a low-profile structure because the proposed structure can decrease the coupling between the antenna and nearby ground plane. Both the two antennas in this thesis can cover the 704~960 and 1710~2690 MHz bands for the LTE/WWAN operation.

文字目錄

文字目錄 i
圖形目錄 iii

第一章 序論 (Introduction)
1.1 研究動機 1
1.2 文獻導覽 2
1.3 論文提要 2

第二章 L形低姿勢LTE/WWAN平板通訊裝置平面天線 (L-shaped, Low-profile LTE/WWAN Planar Antenna for Tablet Communication Devices)
2.1 天線設計 4
2.2 角落環境對於天線之影響 6
2.3 技術原理與參數分析 6
2.4 場型分析 15
2.5 心得與討論 20

第三章 LTE/WWAN平板通訊裝置之雙天線陣列 (LTE/WWAN Two-antenna Array for Tablet Communication Devices)
3.1平板通訊裝置角落環境對於雙天線陣列之影響 22
3.2 相關係數與場型分析 26
3.3 雙天線陣列配置分析與討論 31
3.4 心得與討論 33


第四章 低姿勢LTE/WWAN平板通訊裝置天線設計 (Low-profile Planar LTE/WWAN Antenna for Tablet Communication Devices)
4.1 應用於單一側邊之低姿勢平面天線設計 36
4.2 參數分析 42
4.3 心得與討論 44

第五章 結論 (Conclusions) 45

參考文獻 (References) 47

論文著作表 (Publication List) 50

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