本論文提出一種應用於薄形手持通訊裝置的接地面天線設計，可以涵蓋LTE/WWAN之操作頻寬。本天線主要針對低頻的部分作天線縮小化的設計，並且提出一寬頻匹配電路架構，來達成低頻有小尺寸且寬頻的特性，並且加入了可切換或可重組式天線架構的概念，利用雙饋入搭配切換開關(例如: PIN二極體)，使低頻和高頻天線可以獨立操作。本論文之一實施例於高頻操作時，天線可涵蓋GSM1800/1900/UMTS/LTE2300/2500 (1710~2690 MHz)，於低頻操作時天線則藉由寬頻匹配電路的幫助，可涵蓋GSM850/900 (824~960 MHz)，整體天線尺寸僅為10 x 20 mm2。此種小尺寸的天線可以視為天線與接地面是有緊密的整合，使整體天線可視為一“接地面天線”之架構。除了分析天線的結構與特性之外，同時也探討將本天線設計應用於陣列天線的情況，以及近場輻射對人體影響的SAR和HAC的模擬和分析。

In this thesis, a ground antenna is presented for applications in slim handheld communication devices to cover LTE/WWAN operation. The antenna has a very small size, yet can provide two wide operating bands with the aid of a wideband matching circuit. By combining the design concept of switchable or reconfigurable antennas, it is promising for the proposed antenna to have two feeds connected to respective switch elements (for example, a PIN diode) to independently control the antenna’s low-band and high-band operation. One embodiment of the proposed antenna can cover the GSM1800/1900/UMTS/LTE2300/2500 (1710~2690 MHz) bands when operated in the high band, and can cover the GSM850/900 (824 ~960 MHz) bands when operated in the low band. The antenna occupies a size of 10 x 20 mm2 only. Such a small antenna can be considered to combine with the device system ground plane to form an asymmetric dipole structure, and hence can be treated as a ground antenna structure. In addition to analyze the antenna structure and the obtained radiation of the antenna characteristics, an antenna array formed using the proposed antenna is also tested. The SAR and HAC of near-field effects of the antenna on human body are also studied.

目錄 i
圖次 iii
表次 v
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 接地面天線搭配寬頻匹配電路應用於GSM850/900之操作 (Ground Antenna with Wideband Matching Circuit for the GSM850/900 Operation)
2.1天線與匹配電路設計原理介紹 4
2.2 模擬結果與匹配電路元件分析 7
2.3 心得與討論 14
第三章 可切換式接地面天線架構應用於LTE/WWAN之操作 (Switchable Ground Antenna Structure for the LTE/WWAN Operation)
3.1天線結構與技術說明 16
3.2模擬結果與參數分析 19
3.3延伸研究 26
3.4心得與討論 28
第四章 智慧型手機之LTE/WWAN接地面陣列天線設計 (LTE/WWAN Ground Antenna Array for Smartphone Application)
4.1陣列天線架構分析 30
4.2天線實驗結果與分析 35
4.3心得與討論 39
第五章 天線之人體效應研究 (Antenna Effects on Human Body)
5.1模擬使用者頭部SAR之結果與分析 40
5.2手機HAC測試結果與分析 44
5.3心得與討論 47
第六章 結論 (Conclusions) 48
參考文獻 (References) 51
論文著作表 (Publication List) 55

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