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研究生:賴威廷
研究生(外文):Wei-Ting Lai
論文名稱:應用在行動通訊的環狀形式帶通屏蔽體
論文名稱(外文):Loop-type Bandpass Shielding Enclosures for Mobile Applications
指導教授:邱政男邱政男引用關係
指導教授(外文):Cheng-Nan Chiu
學位類別:碩士
校院名稱:大葉大學
系所名稱:電信工程學系碩士班
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:2007
畢業學年度:95
語文別:中文
論文頁數:64
中文關鍵詞:頻率選擇面屏蔽週期性電磁干擾無線通訊帶通結構環型迴圈
外文關鍵詞:frequency-selective surfaceshieldingshieldingelectromagnetic interferencewireless communication
相關次數:
  • 被引用被引用:1
  • 點閱點閱:95
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  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本篇論文設計一應用於手持無線通訊裝置之帶通屏蔽體(Bandpass Shielding Enclosure, BPSE),並將頻帶操作於IEEE 802.11b/g 無線區域網路(Wireless Local-Area Network, WLAN)之頻帶2.4 – 2.484 GHz。
本篇論文主要是參考前人所設計的二維頻率選擇表面(Frequency Selective Surface, FSS),將之進一步設計為三維的屏蔽體,利用迴圈型式的元件設計出三維的屏蔽體,使其能被廣泛的應用於一般常用的手持無線通訊系統,例如:手機、PDA、筆記型電腦等。
本篇設計目標在於設計能屏蔽通訊頻帶以外的電磁雜訊,並且對於通訊頻帶內的穿透率,必須維持在100 %左右,才不至於影響原本通訊器的傳輸功能。對於內部天線阻抗匹配頻寬與輻射場型,也必須盡量保持天線原本的特性,不能有太大的改變。
最後以實作佐證模擬的結果,證實利用迴圈型式的元件所設計出來的BPSE,能達到帶通的效果,且能有效屏蔽頻帶以外的雜訊;對於內部天線阻抗匹配頻寬與輻射場型的影響也不大,達到設計的目標。
This paper presents a bandpass shielding enclosure (BPSE) design for handheld wireless communication devices having IEEE 802.11 b/g wireless local-area network (WLAN) module.
This design is mainly based well-known frequency selective surfaces which are further designed to construct a three-dimensional shielding enclosure. The loop-type apertures are used to design the BPSE. The BPSE is required to provide high transmittance at the specified communication band and high shielding effectiveness outside this band, and to have little influence on the radiation characteristics of an internal antenna located inside the enclosure.
The simulated and measured results obtained demonstrate that the BPSE designed by using the loop-type apertures can have bandpass property and can shield interference outside the band. Besides, there is little influence on the impedance-matching bandwidth and radiation patterns of the internal antenna. Consequently, the objectives of this design are achieved.
封面內頁
簽名頁
授權書.........................iii
中文摘要........................iv
英文摘要........................v
誌謝..........................vi
目錄..........................vii
圖目錄.........................ix
表目錄.........................xii
第一章 緒論
1.1 研究動機與目的...............1
1.2 帶通屏蔽體概論...............1
1.3 本論文架構.................3
第二章 帶通屏蔽體
2.1 電磁屏蔽理論................4
2.2 頻率選擇面理論...............9
2.3 各種常見的幾何元件.............13
2.4 迴圈形式的設計原理.............14
第三章 設計迴圈形式的BPSE操作於WLAN
3.1 迴圈形式重要參數之影響...........17
3.2 四種迴圈結構的尺寸介紹...........21
3.3四種迴圈結構的結果與討論..........24
3.3.1 圓形迴圈之結果與討論..........24
3.3.2 四角負載元件之結果與討論........27
3.3.3 六角形迴圈之結果與討論.........29
3.3.4 方形迴圈之結果與討論..........31
3.4四種迴圈結構的綜合比較...........33
第四章 探討六角形迴圈形式之排列方式
4.1 元件的排列方式...............37
4.2 不同排列方式之結果.............40
4.3 探討元件排列方式之優劣以及實作結果.....44
第五章 結論......................49
參考文獻........................50
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