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研究生:陳登御
論文名稱:寬頻圓極化部份接地微帶天線
論文名稱(外文):Broadband partially shorted microstrip antenna with circular polarization
指導教授:洪萬鑄
學位類別:碩士
校院名稱:國立彰化師範大學
系所名稱:電信工程研究所
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:2008
畢業學年度:96
語文別:中文
論文頁數:45
中文關鍵詞:寬頻圓極化部份接地微帶天線L型探針
相關次數:
  • 被引用被引用:1
  • 點閱點閱:369
  • 評分評分:
  • 下載下載:43
  • 收藏至我的研究室書目清單書目收藏:0
本論文主要研究圓極化天線,利用短路牆天線的優點:低成本、體積小、結構簡單,設計出寬頻圓極化部份接地微帶天線,天線結構包含兩個短路牆來產生圓極化效果;在寬頻圓極化部份接地微天線的設計中,將天線尺寸設計在1.80GHz的頻段。此外,在天線的設計上為了達到寬頻的效果,本論文提出使用L型探針饋入端,在結構中利用矩形金屬片與銅柱形成L型探針饋入端來激發天線,由空氣介質為基底,高度增加會使銅柱產生電感,藉由調整矩形金屬片長度大小,可以有效的抑制銅柱所產生的寄生電感效應,控制天線的阻抗匹配達到寬頻的效果。阻抗頻寬的範圍1.58 GHz ~ 2.48 GHz (約為50%),圓極化頻寬範圍約為1.58 GHz ~ 2.38 GHz (約為44.4%)。
此外,目前我們正在研究設計高指向性圓極化天線,利用Yagi-Uda天線高指向性的原理,希望能設計出具有圓極化效果的高指向天線。
Abstract
In this thesis, we propose a broadband circularly polarized shorted wall antenna, which design procedure of broadband circularly polarized fed by an L-probe. For the broadband circularly polarized antenna design, the antenna dimension is made suited for operating in 1.80 GHz band. The distance between patch antenna and ground plan is 0.96λ0. Use a horizontal rectangular metal strip and a vertical cylinder copper to form L-probe feed. The impedance of the antenna can be controlled by tuning the length and width of the rectangular metal strip. This shorted wall antenna has two shorting to form vertical field and can obtain the circularly polarized radiation characteristic. Achieving the 3-dB axial ratio bandwidth of 44.4% and the 10-dB impedance bandwidth of 50%. The shorted wall is designed using CST STUDIO SUITE 2006 microwave electromagnetic simulation software.
中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
圖目錄 vi
表目錄 ix

第一章 緒論 1
1-1 研究動機 1
1-2 文獻探討 2
1-3 論文大綱 4

第二章 寬頻圓極化部份接地微帶天線之設計 5
2-1 概述 5
2-2 L型探針饋入端設計 6
2-2-1 設計概念與方法 6
2-2-2 實驗結果與分析 6
2-3 寬頻圓極化部份接地微帶天線之設計 9
2-3-1 圓極化部份接地微帶天線設計概念與方法 9
2-3-2 圓極化部份接地微帶天線實驗結果與分析 9
2-3-3 寬頻圓極化部份接地微帶天線設計概念與方法 17
2-3-4 寬頻圓極化部份接地微帶天線實驗結果與分析 18


第三章 結論 36
第四章 未來展望 37
參考文獻 41
作者簡歷 45

圖目錄
圖2.1(a) 一般饋入端天線結構圖 7
圖2.1(b) L型饋入端水平部份為金屬片之天線結構圖 7
圖2.1(c) L型饋入端水平部份為銅柱之天線結構圖 7
圖2.2 一般饋入端與L型探針饋入端之Return Loss圖 8
圖2.3 使用二個短路牆之天線結構圖。短路牆尺寸大小:W=21mm,H=16mm..10
圖2.4 將二個短路牆縮小之結構圖。短路牆尺寸大小:W=21mm ~ 5mm,H=16mm 11
圖2.5 將二個短路牆縮小之Return Loss圖。短路牆尺寸大小:L=21mm ~ 5mm,H=16mm 12
圖2.6(a) 二個短路牆在1.80GHz模擬的輻射場型圖。短路牆尺寸大小:W=21mm,H=16mm 13
圖2.6(b) 二個短路牆在2.50GHz模擬的輻射場型圖。短路牆尺寸大小:W=21mm,H=16mm 13
圖2.7(a) 二個短路牆在1.80GHz模擬的輻射場型圖。短路牆尺寸大小:W=15mm,H=16mm 14
圖2.7(b) 二個短路牆在2.50GHz模擬的輻射場型圖。短路牆尺寸大小:W=15mm,H=16mm 14
圖2.8(a) 二個短路牆在1.80GHz模擬的輻射場型圖。短路牆尺寸大小:W=10mm,H=16mm 15
圖2.8 (b) 二個短路牆在2.50GHz模擬的輻射場型圖。短路牆尺寸大小:W=10mm,H=16mm 15
圖2.9(a) 二個短路牆在1.80GHz模擬的輻射場型圖。短路牆尺寸大小:W=5mm,H=16mm 16
圖2.9(b) 二個短路牆在2.50GHz模擬的輻射場型圖。短路牆尺寸大小:W=5mm,H=16mm 16
圖2.10 將一個短路牆移至天線角落之結構圖。短路牆尺寸大小:W = 5mm,H =16mm 19
圖2.11 將二個短路牆移至天線角落之結構圖。短路牆尺寸:W = 5mm,H = 16mm 20
圖2.12 將短路牆移至天線角落之Return Loss圖。短路牆尺寸:W = 5mm,H = 16mm,中心頻率1.80GHz 21
圖2.13(a) 一個短路牆在天線角落之模擬輻射場型圖。短路牆尺寸:W = 5mm,H = 16mm,中心頻率1.80GHz 22
圖2.13(b) 二個短路牆在天線角落之 模擬輻射場型圖。短路牆尺寸:W = 5mm,H = 16mm,中心頻率1.80GHz 22
圖2.14 天線移至接地面角落之結構圖。中心頻率1.80GHz 23
圖2.15 天線移至接地面角落之Return Loss圖。中心頻率1.80GHz 24
圖2.16 天線移至接地面角落之幅射場型圖。中心頻率1.80GH 24
圖2.17 天線移至接地面角落之電流分怖圖。 25
圖2.18 天線截去接地面後之結構圖。裁截尺寸:39.5mm × 35mm,中心頻率1.80GHz 26
圖2.19 天線截去接地面後之Return Loss圖。裁截尺寸:39.5mm × 35mm,中心頻率1.80GHz 27
圖2.20 天線截去接地面後幅射場型圖。裁截尺寸:39.5mm × 35mm,中心頻率1.80GHz 27
圖2.21 寬頻圓極化部份接地微帶天線結構圖。接地面裁截尺寸:39.5mm × 35mm,槽孔尺寸:4mm × 39mm,中心頻率1.80GHz 28
圖2.22 寬頻圓極化部份接地微帶天線Return Loss圖。中心頻率1.80GHz 29
圖2.23 寬頻圓極化部份接地微帶天線幅射場型圖。中心頻率1.80GHz 29
圖2.24 寬頻圓極化部份接地微帶天線3D幅射場型圖。中心頻率1.80GHz. 30
圖2.25 寬頻圓極化部份接地微帶天線實作結構圖。接地面裁截尺寸:39.5mm × 35mm,槽孔尺寸:4mm × 39mm,中心頻率1.80GHz 31
圖2.26 寬頻圓極化部份接地微帶天線Return Loss量測與模擬圖。中心頻率1.80GHz 32
圖2.27 寬頻圓極化部份接地微帶天線Axial Ratio量測與模擬。中心頻率1.80GHz 32
圖2.28(a) 寬頻圓極化部份接地微帶天線1.80GHz量測圓極化幅射場型。 33
圖2.28(b) 寬頻圓極化部份接地微帶天線1.89GHz量測圓極化幅射場型。 33
圖4.1 Yagi-Uda天線結構圖。L= 10 mm,半徑R= 0.5 mm 38
圖4.2 dipole加loop天線結構圖。L= 10 mm,半徑R= 0.5 mm 38
圖4.3 高指性圓極化天線結構圖。L= 10 mm,半徑R= 0.5 mm 39
圖4.4 高指性圓極化天線Return Loss圖 40
圖4.5 高指性圓極化天線圓極化場型圖 40

表目錄
表2.1 寬頻圓極化部份接地微帶天線相關參數。 34
表2.2 短路牆天線不同饋入端相關特性表現。 34
表2.3 短路牆在天線位置不同處的相關特性表現。35
表2.4 天線在接地面上位置不同的相關特性表現。35
表2.5 寬頻圓極化部份接地微帶天線相關特性表現。35
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