本論文提出一種應用於超薄筆記型電腦裝置中的LTE/WWAN天線及LTE MIMO天線系統，其中MIMO天線系統由一個LTE/WWAN八頻天線及一個LTE三頻天線所組成，八頻天線使用嵌入式並接共振電路之技術來增加頻寬，此技術可使原本於低頻的單共振模態變成雙共振模態，以涵蓋低頻LTE700/GSM850/900之操作頻寬，此外，論文中提出一種改善MIMO天線系統之隔離度的技術，此技術是在筆記型電腦之上蓋之導電支撐板上植入一半波長槽孔，藉由槽孔的共振頻率與欲改善隔離度之頻帶相近，來吸引導電支撐板上的表面電流，進而降低兩天線之間之電流耦合，而提升天線之間的隔離度，此項技術同時並具有不影響MIMO天線的輻射效率及阻抗匹配的優點。

In this thesis, WWAN/LTE and LTE MIMO antennas for ultrabook computers are presented. The MIMO antenna system comprises an eight-band LTE/WWAN antenna and a three-band LTE antenna. The bandwidth of the eight-band LTE/WWAN antenna is enhanced by using an embedded parallel resonant circuit, which can result in dual-resonance excitation of the lowest resonant mode of the antenna. The bandwidth of the antenna’s lower band can hence cover the LTE700/GSM850/900 operation. A design technique of improving the isolation of the MIMO antenna system is also presented. The isolation enhancement is obtained by embedding a 0.5-wavelength slot in the conductive supporting plate of the upper cover of the ultrabook computer. The embedded slot can attract the excited surface currents in the conductive supporting plate and decrease the coupling between the MIMO antennas through the coupling of the surface currents. The isolation between the MIMO antennas can hence be enhanced. Moreover, this technique will not lead to decreased radiation efficiency and impedance matching of the MIMO antennas, which is attractive for practical applications.

文字目錄 i
圖形目錄 iii
表格目錄 vi
第一章 序論 (Introduction) 1
1.1 概述 1
1.2 文獻導覽 2
1.3 論文提要 3
第二章 使用嵌入式並接共振電路來增加頻寬之LTE/WWAN八頻天線(Bandwidth Enhancement of LTE/WWAN Antenna Using Embedded Parallel Resonant Circuit) 6
2.1 天線設計與原理說明 7
2.2 天線設計實驗結果與分析 9
2.3 心得與討論 17
第三章 LTE三頻天線及LTE MIMO天線 (LTE Antenna and LTE MIMO Antenna) 19
3.1 LTE三頻天線與原理 20
3.2 天線設計實驗結果與分析 22
3.3 LTE MIMO天線結構與原理分析 29
3.4 心得與討論 38
第四章 藉由植入一半波長槽孔於導電支撐板上來改善MIMO天線隔離度 (Isolation Enhancement of the MIMO Antennas Using a 0.5-Wavelength Slot Embedded in the Conductive Supporting Plate) 39
4.1 改善隔離度之設計結構與技術說明 39
4.2 天線陣列實驗結果與分析 41
4.3 心得與討論 51
第五章 結論 (Conclusions) 53
參考文獻 (References) 55
論文著作表 (Publication List) 59

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