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研究生:柯慶祥
研究生(外文):Qing-Xiang Ke
論文名稱:新型圓極化平面槽孔天線設計
論文名稱(外文):Novel Design of Planar Slot Antenna for Circular Polarization
指導教授:鄧一中
指導教授(外文):I-Chung Deng
學位類別:碩士
校院名稱:北台灣科學技術學院
系所名稱:機電整合研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:92
中文關鍵詞:圓極化微帶天線共面波導饋入槽孔天線
外文關鍵詞:Circular polarizationCoplanar waveguide-fedMicrostrip
相關次數:
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本論文的內容針對一些新型的圓極化平面槽孔天線之特性進行分析與探討,其中以單層和雙層的天線做了一些應用設計。在雙層方面,本研究提出微帶線饋入後,連接曲折線與微帶貼片達到阻抗匹配,設計圓極化環形槽孔天線,並利用槽孔的結構設計圓極化操作,再者提出一種新型的微帶線饋入式圓極化槽孔天線,以前述方式達到50 歐姆的阻抗匹配,並使用具有缺口的方形環狀線來達到圓極化輻射,這些設計分別可達到圓極化頻寬13.2%與7.2%。
在單層方面,針對共面波導的饋入方式來設計圓極化方形槽孔天線,藉由具有缺口的方形環狀線和饋入線連接,來達到圓極化輻射,最後,以圓形槽孔來設計圓極化天線,由於圓形有好的對稱結構,可提高3dB 圓極化頻寬,方形與圓形槽孔的圓極化頻寬分別可達到14.6%與16.6%。
Novel designs of circularly polarized(CP)printed Planar slot antennas have been investigated in this dissertation. For the double layer designs, the study of CP slot antenna fed by a microstrip line. The input impedance of slot antenna can be matched by meander line and microstrip patch The CP radiation is achieved by means of using a shorted square-ring slot. The other study of CP antenna radiation is achieved by means of using a rectangular ring with a gap at thecenter of square slot. The obtained CP are 13.2% and 7.2% respectively.
For the single layer designs, the study of CP square slot antenna fed by a single coplanar waveguide. The CP radiation is achieved by means of using a rectangular ring with a gap at the center of a square slot. Finally, the study of CP circle slot antenna. Circle slot have good symmetry structures, therefore radiation characteristics of circle slot is better than square slot. CP bandwidth of square and circle slot are 14.6% and 16.6% respectively.
摘要 .............................................................................................................. i
Abstract ............................................................................................................iii
誌 謝............................................................................................................. v
目 錄 ............................................................................................................ vi
圖 目 錄 ............................................................................................................ ix
表 目 錄 .......................................................................................................... xiv
第一章 緒論......................................................................................................... 1
1.1 概述......................................................................................................... 1
1.2 文獻探討................................................................................................ 1
1.3 內容提要................................................................................................. 3
第二章 天線設計與原理..................................................................................... 5
2.1 天線原理................................................................................................ 5
2.2 天線輻射理論........................................................................................ 5
2.3 天線性能的判別..................................................................................... 6
2.3.1 輸入阻抗(Input Impedance)................................................... 7
2.3.2 返回損失(Return Loss) .......................................................... 8
2.3.3 輻射場型(Radiation Pattern).................................................. 9
2.3.4 天線的增益(Gain).................................................................. 9
2.3.5 損耗與效率(Loss and Efficiency,η )................................. 10
2.4 基本天線結構....................................................................................... 10
2.4.1 微帶天線.................................................................................... 11
2.4.2 共面波導饋入式天線................................................................ 11
2.5 天線的極化........................................................................................... 12
2.6 映像定理............................................................................................... 16
2.7 天線設計流程....................................................................................... 18
第三章 以微帶線饋入式之圓極化槽孔天線設計........................................... 21
3.1 概述...................................................................................................... 21
3.2 微帶線饋入式環形槽孔天線設計....................................................... 21
3.3 實驗結果與討論................................................................................... 27
3.4 微帶線饋入式圓極化槽孔天線設計................................................... 34
3.5 實驗結果與討論................................................................................... 39
第四章 共面波導饋入式圓極化槽孔天線設計............................................... 47
4.1 概述....................................................................................................... 47
4.2 共面波導饋入式圓極化槽孔天線設計............................................... 47
4.3 實驗結果與討論................................................................................... 52
4.4 共面波導饋入式圓極化圓形槽孔天線設計....................................... 61
4.5 實驗結果與討論................................................................................... 65
第五章 天線效率與地的影響........................................................................... 73
第六章 結論....................................................................................................... 85
參考文獻............................................................................................................. 87
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