臺灣博碩士論文加值系統

本論文提出三種應用於智慧型手錶之多頻天線設計，前兩種設計皆採用將開槽孔印製於手錶全金屬錶框上的方式，實現單頻(Bluetooth/Wi-Fi 2.4 GHz)操作及雙頻(GNSS 1.6 GHz、Bluetooth/Wi-Fi 2.4 GHz)操作；第三種採用將PIFA印製於手錶錶框內側，實現三頻(GSM900/1800、Bluetooth/Wi-Fi 2.4 GHz)操作。手腕效應對所提的天線特性的影響也詳細被探討。所提的第一種天線為一簡單開槽孔結構，且其由一微帶饋入線來耦合激發。本天線所完成的阻抗頻寬可涵蓋2.4 GHz頻帶所需的頻寬(2400 ~ 2484 MHz)，當天線與手腕距離2 mm時，其天線效率介於25% ~ 29%。第二種天線由一開槽孔、一微調槽孔及一含晶片電容的雙分支饋入線所構成。經由兩分支饋入線可激發開槽孔的兩個模態，使其可涵蓋1560 ~ 1610 MHz及2400 ~ 2484 MHz的操作頻寬。當天線與手腕距離2 mm時，其天線效率在GNSS頻帶介於21% ~ 22%及Wi-Fi頻帶介於24% ~ 27%。第三種天線由一三分支PIFA所構成，透過各分支可激發四個模態，並調整短路線的長短度達到阻抗匹配。本天線所完成的阻抗頻寬可涵蓋880 ~ 960 MHz、1710 ~ 1880 MHz以及2400 ~ 2484 MHz的操作頻寬。

Three novel designs of the multiband antenna designs for applications in smart watches are presented in this thesis. The first proposed antenna has a simple open slot structure excited by a microstrip feedline. The achieved impedance bandwidths of the proposed antenna can cover the Bluetooth/Wi-Fi 2.4 GHz band (2400 ~ 2484 MHz). For the spacing 2 mm between the antenna and wrist, the antenna efficiency is 25% ~ 29%. The second proposed antenna consists of an open slot, a tuning slot and a two-branch microstrip feedline integrated with a chip capacitor. The achieved impedance bandwidths can cover the GPS 1.6 GHz bands (1560 ~ 1610 MHz) and Bluetooth/Wi-Fi 2.4 GHz band. The antenna efficiencies are 21% ~ 27% at 1.6 GHz band and 24% ~ 27% at 2.4 GHz band. As for the third proposed antenna, a triple-branch PIFA is used. The bandwidths of the antenna can cover the GSM900 band (880 ~ 960 MHz), GSM900 band (1710 ~ 1880 MHz), and Bluetooth/Wi-Fi 2.4 GHz band.

文字目錄
中文摘要 i
英文摘要 ii
文字目錄 iii
圖形目錄 v
表格目錄 vii
第一章 序論 (Introduction) 1
1.1 研究動機 1
1.2 文獻導覽 3
1.3 章節提要 4
第二章 應用於金屬邊框智慧型手錶之Bluetooth/Wi-Fi 2.4 GHz開槽孔天線(Bluetooth/Wi-Fi 2.4 GHz open-slot antenna for application in metal-framed smart watch) 5
2.1 前言 5
2.2 天線結構與設計原理 5
2.3 結果與討論 10
2.4 心得與討論 17
第三章 應用於金屬邊框智慧型手錶之雙頻開槽孔天線 (Dual-band open-slot antenna for application in metal-framed smart watch) 18
3.1 前言 18
3.2 天線結構與設計原理 18
3.3 結果與討論 21
3.4 心得與討論 35
第四章 應用於智慧型手錶之三頻倒F形天線 (Triple-band PIFA for application in smart watch) 36
4.1 前言 36
4.2 天線結構與設計原理 36
4.3 結果與討論 40
4.4 心得與討論 48
第五章 結論 (Conclusions) 49
參考文獻 (References) 50
 
圖形目錄
圖1.1 Apple Watch；(a)外觀實體圖，(b)錶框及內部天線。 2
圖2.1 (a)本天線系統配置圖及，(b)天線結構圖。 7
圖2.2 天線實體照片。 7
圖2.3 (a)天線與手腕平行；(b)天線與手腕垂直 8
圖2.4 手腕各層組織的介電常數。 9
圖2.5 手腕各層組織的導電率。 9
圖2.6 本天線模擬及量測的返回損失結果。 12
圖2.7 本天線模擬及量測的天線效率。 12
圖2.8 本天線與手腕間距S所得的模擬返回損失。 13
圖2.9 本天線與手腕間距S所得的模擬及量測天線效率。 13
圖2.10 改變天線與手腕相對位置所得的模擬天線效率(S = 2 mm)。 14
圖2.11 天線與不同手腕模型所得的模擬返回損失(S = 2 mm)。 15
圖2.12 天線與不同手腕模型所得的模擬天線效率(S = 2 mm)。 15
圖2.13 本天線模擬與量測的二維輻射場型結果；
(a)自由空間，(b) 間距S = 2 mm。 16
圖3.1 (a)本天線系統配置圖及，(b) 天線結構圖。 20
圖3.2 天線實體照片。 20
圖3.3 本天線模擬及量測的返回損失結果；C = 4.2 pF，L = 11.5 mm。 23
圖3.4 參考天線與本天線的模擬輸入阻抗結果；
(a) 輸入電阻，(b) 輸入電抗。 24
圖3.5 參考天線與本天線的模擬所得的模擬返回損失。 25
圖3.6 改變晶片電容元件值C所得到的模擬輸入阻抗結果；
(a) 輸入電阻，(b)輸入電抗。 26
圖3.7 改變晶片電容元件值C所得到的模擬返回損失結果。 27
圖3.8 改變槽孔分支長度d所得到的模擬輸入阻抗結果；
(a) 輸入電阻，(b)輸入電抗。 28
圖3.9 改變槽孔分支長度L所得到的模擬返回損失結果。 29
圖3.10 本天線開槽孔的模擬電場結果；
(a) 1600 MHz，(b) 2450 MHz。 30
圖3.11 本天線的模擬電流結果；
(a) 1600 MHz，(b) 2450 MHz。 31
圖3.12 本天線模擬與量測的天線效率。 32
圖3.13 本天線模擬與量測的增益。 32
圖3.14 本天線在自由空間時模擬與量測的二維輻射場型；
(a) 1600 MHz，(b) 2450 MHz。 33
圖3.15 本天線與手腕間距S = 2 mm時模擬的二維輻射場型；
(a) 1600 MHz，(b) 2450 MHz。 34
圖4.1 (a) 本天線系統配置圖及，(b) 天線結構圖，(c) 接地面結構圖。 38
圖4.2 天線實體照片。 39
圖4.3 本天線模擬及量測的返回損失結果。 41
圖4.4 本天線的模擬電流結果；
(a) 960 MHz，(b) 1760 MHz，(c) 1860 MHz，(d) 2450 MHz。 42
圖4.5 本天線模擬與量測的天線效率。 43
圖4.6 本天線模擬與量測的增益。 43
圖4.7 本天線在自由空間時模擬與量測的二維輻射場型；
(a) 960 MHz，(b) 1760 MHz，(c) 1860 MHz，(d) 2450 MHz。 45
圖4.8 本天線與手腕間距S = 2 mm時模擬的二維輻射場型；
(a) 960 MHz，(b) 1760 MHz，(c) 1860 MHz，(d) 2450 MHz。 47

 
表格目錄
表2.1 手腕各層組織密度與厚度。 8

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