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姓名 劉哲睿(Che-jui Liu) 查詢紙本館藏 畢業系所 通訊工程學系在職專班 論文名稱 適用於802.11a/b/g WLAN USB dongle曲折型單極天線設計改良
(Monopole Antenna Design For 802.11a/b/g WLAN USB Dongle)相關論文 檔案 [Endnote RIS 格式] [Bibtex 格式] [相關文章] [文章引用] [完整記錄] [館藏目錄] 至系統瀏覽論文 ( 永不開放) 摘要(中) 在此研究中,我們引用單極天線之基本技巧,並結合全新設計的
曲折型天線圖樣,在市售FR4雙層感光印刷電路板上設計、製造出雙
頻天線。
首先設計一支分別應用在802.11a/b/g的曲折型單極天線A,再經
由電磁模擬軟體(HFSS)驗證。可由反射系數、輻射場型和增益各種天線特性中來判斷其設計的優劣。
再設計出另一支天線B,2.4GHz共振路徑經過螺旋狀結構後,可
使得整體天線面積縮小約為天線A的一半,再經過模擬後,此天線於
低頻的頻寬增加了360 MHz,證實修改天線共振路徑和方向後可以符
合在無線區域網路之應用,並有效減少使用面積,增加操作頻寬和增益。
摘要(英) In this study,we had designed and manufactured the dual
band antennas on commercial PCBs by using the basic techniques of printed monopole antenna and combining with new meander-line antenna patterns.
First,design one meander-line monopole antenna A use on
802.11a/b/g application,after the verification of the
electromagnetic simulation software(HFSS) ,we can check return loss、radiation patten and gain from various kinds of parameter characteristics of the antenna to know the design is good or not.
Finally,design another meander-line monopole antenna
B,After check by HFSS,the low frequency bandwith improve 360MHz that prove to modify the resonance path and direction can conform to WLAN application and reduce the antenna area,improve the low frequency bandwith and Gain.
關鍵字(中) ★ 單極天線
★ 曲折型天線
★ 印刷電路板
★ 雙頻天線.關鍵字(英) ★ 802.11a/b/g
★ WLAN
★ monopole antenna
★ meander-line antenna.論文目次 目 錄
摘 要................................................... I
ABSTRACT ...............................................II
誌 謝................................................. III
目 錄.................................................. IV
圖 目 錄.............................................. VII
表 目 錄................................................ X
第一章 序論.............................................. 1
1.1 前言............................................ 1
1.2 研究動機........................................ 2
1.3 研究目的........................................ 3
1.4 論文架構........................................ 3
第二章 無線網路簡介和天線理論及其參數介紹................ 5
2.1 無線網路簡介.................................... 5
2.1.1 無線網路的由來................................ 5
2.1.2 通訊協定802.11 的發展......................... 7
2.2 天線理論及其參數介紹............................ 9
2.2.1 天線的定義.................................... 9
2.2.2 天線的基本理論............................... 10
2.2.3 天線的分類................................... 12
2.2.4 天線的基本參數介紹........................... 14
2.2.5 微帶天線介紹................................. 22
2.2.6 雙極天線和單極天線的介紹..................... 26
第三章 WLAN DONGLE 之曲折型單極天線設計流程..............29
3.1 天線的基本設計流程圖........................... 29
3.2 WLAN DONGLE 之曲折型單極天線設計介紹........... 30
3.2.1 產品規格和天線可規劃區域..................... 30
3.2.2 依可用區域選擇天線樣式及饋入方式............. 32
3.3 天線模擬軟體介紹............................... 34
第四章 WLAN DONGLE 之曲折型單極天線設計與改良........... 36
4.1 前言........................................... 36
4.2 曲折型單極天線A 設計........................... 36
4.2.1 天線A 設計結構圖............................. 38
4.2.2 天線A 模擬結果............................... 39
4.2.3 天線A 分析與討論............................. 45
4.3 曲折型單極天線B 設計........................... 46
4.3.1 天線B 設計結構圖............................. 47
4.3.2 天線B 模擬結果............................... 49
4.3.3 天線B 分析與討論............................. 55
4.4 曲折型單極天線A 與天線B 的比較分析............. 56
4.4.1 設計面積的比較............................... 56
4.4.2 反射系數的比較............................... 57
4.4.3 使用頻寬的比較............................... 59
4.4.4 天線增益的比較............................... 60
第五章 結論與未來研究方向............................... 62
5.1 結論........................................... 62
5.2 未來研究方向................................... 62
參考文獻................................................ 64
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指導教授 林嘉慶、蔡木金
(JIA-CHIN LIN、MU-KING TSAY)審核日期 2009-7-9 推文 facebook plurk twitter funp google live udn HD myshare reddit netvibes friend youpush delicious baidu 網路書籤 Google bookmarks del.icio.us hemidemi myshare