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研究生:高愈昌
研究生(外文):Yu-Chang Kao
論文名稱:可攜式RFID讀取器之圓極化天線設計
論文名稱(外文):Design of Circularly Polarized Antennas for Portable RFID Reader
指導教授:陳華明陳華明引用關係林憶芳林憶芳引用關係
指導教授(外文):Hua-Ming ChenYi-Fang Lin
學位類別:碩士
校院名稱:國立高雄應用科技大學
系所名稱:光電與通訊研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:100
中文關鍵詞:圓極化槽孔天線射頻辨識應用
外文關鍵詞:Circular PolarizationSlot AntennaRFID Application
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本論文的研究主要為RFID讀取器之圓極化天線之設計,主要利用槽孔耦合饋入方式,製作出良好圓極化特性以及寬頻帶的圓極化天線,以模擬軟體(Ansoft HFSS)來做為理論的分析,並以實作方式來驗證。第二章為槽孔耦合饋入圓極化平板天線設計,提出箭頭形狀的槽孔以達到激發基板正面對稱的方形金屬片。在第三章中,為一新式的槽孔耦合饋入圓極化圓形槽孔天線,植入一個類似於C字型的金屬片以及圓弧金屬片,以藉由調整金屬片的長度,產生良好的圓極化輻射波。第四章為一個新型的單層板,使用微帶線與槽線轉換的技術之耦合饋入圓極化圓環槽孔天線並應用於UHF頻段,於天線設計上為在圓環槽孔天線植入一個不對稱的微擾元件,以微擾電流方式產生圓極化輻射。
This thesis mainly study in RFID reader antenna. There are used the slot-coupled fed with broadband operation and circular polarization antennas. The design of the antenna are simulated by the software HFSS for the comparison.
In the Chapter 2, a slot-coupled circularly polarised square patch antenna design a pair of radiating square patches with a cross-slot and a microstrip feed line are both etched on the top of a microwave substrate, and a coupling arrowshaped slot is etched on the bottom of this substrate.
In the Chapter 3, a novel circularly polarized circular slot antenna using a C-shape-like strip or a pair of perturbation strips will be applied. This antenna was fed by slot-coupled and allowed easy adjustment by trimming the perturbation strips length. A good circularly polarized wave can be easily excited.
In the Chapter 4, a novel circularly polarized annular-ring slot antenna in the UHF band is presented. In the proposed design, circular polarization is generated using a proper asymmetry within the annular-ring slot structure.
目 錄

中文摘要 ---------------------------------------------------------------- i
英文摘要 ---------------------------------------------------------------- ii
誌謝 ---------------------------------------------------------------- iv
目錄 ---------------------------------------------------------------- v
表目錄 ---------------------------------------------------------------- vii
圖目錄 ---------------------------------------------------------------- viii
第一章 序論---------------------------------------------------------- 1
1.1 研究背景及動機------------------------------------------- 1
1.2 文獻導覽---------------------------------------------------- 4
1.3 研究內容提要---------------------------------------------- 5
第二章 應用於手持式RFID讀取器之可調整軸比單層圓極化平板天線------------------------------------------------- 7
2.1 前言---------------------------------------------------------- 7
2.2 設計原理---------------------------------------------------- 8
2.3 單層圓極化平板天線之設計---------------------------- 9
2.4 結果與討論------------------------------------------------- 15
2.5 結論---------------------------------------------------------- 27
第三章 應用於手持式RFID讀取器之雙向輻射圓極化圓形槽孔天線---------------------------------------------------- 28
3.1 前言---------------------------------------------------------- 28
3.2 設計原理---------------------------------------------------- 29
3.3 植入C字型金屬片圓極化圓形槽孔天線之設計---- 31
3.3.1 結果與討論------------------------------------------------- 38
3.4 植入圓弧金屬片圓極化圓形槽孔天線之設計------- 51
3.4.1 結果與討論------------------------------------------------- 57
3.5 結論---------------------------------------------------------- 70
第四章 應用於手持式RFID讀取器之雙向輻射圓極化圓環槽孔天線---------------------------------------------------- 71
4.1 前言---------------------------------------------------------- 71
4.2 設計原理---------------------------------------------------- 72
4.3 雙向輻射圓極化圓環槽孔天線之設計---------------- 72
4.4 結果與討論------------------------------------------------- 79
4.5 結論---------------------------------------------------------- 91
第五章 結論與未來發展------------------------------------------- 92
參考文獻 ---------------------------------------------------------------- 95



表 目 錄
表1.1 全球主要國家RFID UHF開放頻率表----------------------- 3
表2.1 單層圓極化平板天線的結構相關參數----------------------- 11
表2.2 反射損失實測與模擬值之比較-------------------------------- 18
表3.1 植入C字型金屬片圓極化天線相關參數-------------------- 33
表3.2 天線反射損失實測與模擬值之比較-------------------------- 41
表3.3 植入圓弧金屬片圓極化天線相關參數----------------------- 52
表3.4 天線反射損失實測與模擬值之比較-------------------------- 60
表4.1 天線相關參數----------------------------------------------------- 74
表4.2 反射損失實測與模擬值之比較-------------------------------- 82
表6.1 本研究可攜式RFID讀取器之圓極化天線比較圖--------- 92



圖 目 錄
圖2.1 (a)圓形極化波圖 (b)圓形極化波的條件--------------------- 9
圖2.2 單層圓極化平板天線的結構圖-------------------------------- 11
圖2.3 天線實品圖(a)正面圖 (b)背面圖------------------------------ 12
圖2.4 中心頻率924 MHz的電流分佈圖----------------------------- 14
圖2.5 判斷左右旋圓極化天線圖-------------------------------------- 14
圖2.6 天線反射損失比較圖-------------------------------------------- 18
圖2.7 模擬與實測史密斯圖-------------------------------------------- 19
圖2.8 有無箭頭形狀槽孔所模擬的反射損失圖-------------------- 19
圖2.9 有無箭頭形狀槽孔所模擬的史密斯圖----------------------- 20
圖2.10 改變Lb所模擬的反射損失圖----------------------------------- 20
圖2.11 改變Lb所模擬的軸比頻帶圖----------------------------------- 21
圖2.12 改變Wd所模擬的反射損失圖---------------------------------- 21
圖2.13 改變Wd所模擬的軸比頻帶圖---------------------------------- 22
圖2.14 改變L1所模擬的反射損失圖----------------------------------- 22
圖2.15 改變L1所模擬的史密斯圖-------------------------------------- 23
圖2.16 改變L2所模擬的反射損失圖----------------------------------- 23
圖2.17 改變L2所模擬的史密斯圖-------------------------------------- 24
圖2.18 模擬的相位圖----------------------------------------------------- 24
圖2.19 中心頻率924 MHz的輻射場型分佈圖----------------------- 25
圖2.20 實測與模擬軸比頻帶圖----------------------------------------- 26
圖2.21 實測與模擬增益值----------------------------------------------- 26
圖3.1 各種TM mode波模分佈圖------------------------------------- 31
圖3.2 植入C字型金屬片圓極化天線結構圖----------------------- 33
圖3.3 天線實品圖(a)正面圖 (b)背面圖------------------------------ 34
圖3.4 在中心頻率918 MHz的電流分佈圖-------------------------- 37
圖3.5 天線反射損失比較圖-------------------------------------------- 41
圖3.6 天線模擬與實測史密斯圖-------------------------------------- 42
圖3.7 天線隨相位改變之電流分佈圖-------------------------------- 42
圖3.8 模擬相位圖-------------------------------------------------------- 43
圖3.9 有無圓形槽孔所模擬的反射損失圖-------------------------- 43
圖3.10 有無圓形槽孔所模擬的史密斯圖----------------------------- 44
圖3.11 無C字型的金屬片時改變L3所模擬的史密斯圖----------- 44
圖3.12 無C字型的金屬片改變L3所模擬的軸比頻帶圖---------- 45
圖3.13 改變W1所模擬的史密斯圖------------------------------------- 45
圖3.14 改變W1所模擬的軸比頻帶圖---------------------------------- 46
圖3.15 改變α所模擬的史密斯圖--------------------------------------- 46
圖3.16 改變α所模擬的軸比頻帶圖----------------------------------- 47
圖3.17 改變R3所模擬的反射損失圖---------------------------------- 47
圖3.18 改變R3模擬的史密斯圖---------------------------------------- 48
圖3.19 改變R3所模擬的軸比頻帶圖---------------------------------- 48
圖3.20 中心頻率918 MHz的輻射場型分佈圖----------------------- 49
圖3.21 實測與模擬軸比頻帶圖----------------------------------------- 50
圖3.22 實測與模擬增益值----------------------------------------------- 50
圖3.23 植入圓弧金屬片圓極化天線結構圖-------------------------- 52
圖3.24 天線實品圖(a)正面圖 (b)背面圖------------------------------ 53
圖3.25 在第二個模態的電流分佈圖----------------------------------- 56
圖3.26 天線反射損失比較圖-------------------------------------------- 60
圖3.27 天線模擬與實測史密斯圖-------------------------------------- 61
圖3.28 模擬相位圖-------------------------------------------------------- 61
圖3.29 有無圓弧所模擬的反射損失圖-------------------------------- 62
圖3.30 有無圓弧所模擬的軸比頻帶圖-------------------------------- 62
圖3.31 無圓弧金屬片時所模擬的電流分佈圖----------------------- 63
圖3.32 模擬第一個模態的電流分佈圖-------------------------------- 63
圖3.33 模擬第二個模態的電流分佈圖-------------------------------- 64
圖3.34 改變W1所模擬的反射損失圖--------------------------------- 64
圖3.35 改變W1所模擬的軸比頻帶圖---------------------------------- 65
圖3.36 改變W4所模擬的反射損失圖---------------------------------- 65
圖3.37 改變W4所模擬的軸比頻帶圖---------------------------------- 66
圖3.38 改變R2所模擬的反射損失圖---------------------------------- 66
圖3.39 改變R2所模擬的軸比頻帶圖---------------------------------- 67
圖3.40 中心頻率922 MHz的輻射場型分佈圖----------------------- 68
圖3.41 實測與模擬軸比頻帶圖----------------------------------------- 69
圖3.42 實測增益值-------------------------------------------------------- 69
圖4.1 天線結構圖-------------------------------------------------------- 74
圖4.2 天線實品圖(a)正面圖 (b)背面圖------------------------------ 75
圖4.3 在中心頻率915 MHz的電流分佈圖-------------------------- 78
圖4.4 圓極化圓環槽孔天線反射損失比較圖----------------------- 82
圖4.5 模擬與實測史密斯圖-------------------------------------------- 83
圖4.6 模擬相位圖-------------------------------------------------------- 83
圖4.7 有無圓形槽孔所模擬的反射損失圖-------------------------- 84
圖4.8 有無圓形槽孔所模擬的史密斯圖----------------------------- 84
圖4.9 改變L1所模擬的史密斯圖-------------------------------------- 85
圖4.10 改變L1所模擬的軸比頻帶圖----------------------------------- 85
圖4.11 改變W1所模擬的反射損失圖---------------------------------- 86
圖4.12 改變W1所模擬的軸比頻帶圖---------------------------------- 86
圖4.13 改變R2所模擬的反射損失圖---------------------------------- 87
圖4.14 改變R2所模擬的史密斯圖------------------------------------- 87
圖4.15 改變R2所模擬的軸比頻帶圖---------------------------------- 88
圖4.16 實測與模擬軸比頻帶圖----------------------------------------- 88
圖4.17 在中心頻率915 MHz的輻射場型分佈圖------------------- 89
圖4.18 實測與模擬增益值----------------------------------------------- 90
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