本論文提出一種應用於平板通訊裝置(如平板電腦與平板手機)之小尺寸且結構簡單之LTE/WWAN八頻平面天線設計，尺寸為45 × 10 mm2，具有全平面化印刷之特色，如此將更適用於平板電腦及平板手機之產品中。天線結構包含一倒F形天線及一寄生短路單極天線。藉由調整倒F形天線中之分佈式並接共振結構，可使得倒F形天線在低頻形成雙共振，以涵蓋LTE700/GSM850/900之操作頻寬，而高頻的部分則是透過倒F形天線之輻射部之耦合區間搭配一寄生短路單極天線達成多頻操作，以涵蓋高頻GSM1800/1900/UMTS/LTE2300/2500之操作頻寬。接著，由於此天線設計具有小尺寸且結構簡單之優點，故將此天線設計運用至MIMO天線操作時，天線陣列於各種配置情形下，天線間仍有較佳之隔離度表現。最後再針對可撓式平板手機之彎曲程度對天線輻射特性之影響進行探討。

For eight-band LTE/WWAN operation in the tablet communication devices (tablet computer and phablet), a planar antenna of small size and simple structure is presented. The antenna is printed on a thin FR4 substrate of small size 45 × 10 mm2 with a simple uniplanar structure which is promising for tablet computer and phablet. The proposed antenna mainly comprises an inverted-F antenna and a parasitic shorted strip. The antenna can cover the LTE700/GSM850/900 operation by modifying the distributed parallel-resonant circuit embedded therein, which can result in dual-resonance excitation of the antenna’s fundamental resonant mode such that bandwidth enhancement is obtained for the antenna’s lower band. On the other hand, the antenna’s upper-band bandwidth is also greatly enhanced by using a coupled section in the antenna’s radiating strip and adding a parasitic shorted strip, which leads to multiple resonant modes excited to form a wide bandwidth to cover the GSM1800/1900/UMTS/LTE2300/2500 operation. Owing to its small size and simple structure, the proposed antenna is very suitable to be applied in achieving an antenna array with high isolation for MIMO operation. Finally, bending effects of the flexible phablet on the radiation characteristics of the antenna are studied.

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 3
第二章 小尺寸之LTE/WWAN平板電腦天線 (Small-Size LTE/WWAN Antenna for Tablet Computers)
2.1天線結構及技術原理說明 5
2.2 參數分析 10
2.3 心得與討論 15
第三章 LTE/WWAN平板電腦之天線陣列 (LTE/WWAN Antenna Array for Tablet Computers)
3.1 MIMO天線配置對天線隔離度及場型之討論 16
3.2突出接地面對MIMO天線之隔離度影響 26
3.3 心得與討論 27
第四章 LTE/WWAN天線應用於可撓式平板手機之研究 (Study of LTE/WWAN Antenna for Flexible Phablets)
4.1 LTE/WWAN天線應用於6吋薄形平板手機之研究 29
4.2 LTE/WWAN天線應用於可撓式平板手機之研究 32
4.3 LTE/WWAN平板手機天線之近場分析 36
4.4 心得與討論 42
第五章 結論 (Conclusions) 43
參考文獻 (References) 46
論文著作表 (Publication List) 50

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