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研究生:郭昌鑫
研究生(外文):Chang-Hsin Kuo
論文名稱:應用於現代行動通訊終端之多極帶通屏蔽體設計
論文名稱(外文):A Multi-pole Bandpass Shielding Enclosure for Mobile Communication Terminals
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:95
中文關鍵詞:屏蔽頻率選擇表面電磁干擾週期性結構
外文關鍵詞:ShieldingFrequency selective surfacesEMIPeriodic structures
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本篇論文針對在現代無線通訊系統,提出一多極 (Multi-pole)形式的帶通屏蔽體 (Bandpass shielding enclosure, BPSE)。首先研究二維的頻率選擇表面 (Frequency selective surface, FSS),了解其設計的步驟與重點。之後,再探討分析三維的屏蔽體結構。其中探討了數個多極的週期性元件 (Periodic elements),比較各個元件的優劣以及適用性,進而深入探討多極元件加上負載 (End-loading)對於此種幾何結構造成的影響。最後,設計出之屏蔽體在無線區域網路的通訊頻帶內 (2.4 GHz-2.484 GHz),具有極高的穿透率,而且在此頻帶之外有很好的屏蔽效益,有如濾波器的效果。另外,在屏蔽體內部之天線的阻抗匹配頻寬與天線輻射場型,並不會因為加了此屏蔽體而受到太大的影響。論文中將呈現以全波數值模擬軟體分析,所得到之最佳化設計;並且將最適合的元件,依照設計做出原型,然後實驗量測與驗證,由模擬與量測的結果顯示,這個新的帶通屏蔽體未來有很大的發展性與應用價值。
This paper proposes a new design for mobile communication terminals called the multi-pole bandpass shielding enclosure (BPSE). The purpose of the BPSE is to shield electromagnetic interference (EMI) except for communicational signals. First, multi-pole frequency selective surfaces (FSS) are studied in order to understand the key points of design. Then, the 3D shielding enclosure structure is analyzed and several multi-pole periodic elements are considered. Finally, the multi-pole elements with end-loading are studied in depth. The BPSE features high transmittance at the WLAN (2.4 GHz to 2.484 GHz) band and high shielding effectiveness (SE) outside of this band, which likes a filter and little influence on the radiation performance of an internal linear dipole antenna. A prototype was created, simulated, and measured. The results demonstrate promising performance for this newly proposed shielding enclosure.
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.........................xiv

第一章 緒論
1.1 無線區域網路概述..............1
1.2 研究動機..................4
1.3 文獻回顧..................5
1.4 論文架構..................7

第二章 頻率選擇表面
2.1 頻率選擇表面概述..............8
2.2 頻率選擇表面理論..............9
2.3 頻率選擇表面元件形式............14
2.4 電磁屏蔽理論................17
2.5 微帶傳輸線理論...............21

第三章 WLAN 頻段的頻率選擇表面設計
3.1 週期性元件的設計..............24
3.2 頻率選擇表面模擬方法............25
3.3 偶極槽孔形式................27
3.4 三極槽孔形式................30
3.5 十字槽孔形式................32

第四章 WLAN 頻段的帶通屏蔽體設計
4.1 帶通屏蔽體的模擬方法............35
4.2 偶極槽孔形式的帶通屏蔽體..........37
4.3 三極槽孔形式的帶通屏蔽體..........42
4.4 十字槽孔形式的帶通屏蔽體..........45

第五章 終端負載多極形式之帶通屏蔽體設計
5.1 前言....................49
5.2 終端負載垂直槽孔形式的帶通屏蔽體......49
5.3 終端負載三極槽孔形式的帶通屏蔽體......53
5.4 終端負載十字槽孔形式的帶通屏蔽體......57
5.5 改變屏蔽體高度的影響............64
5.6 實作與量測.................68

第六章 結論......................77
參考文獻........................78
參考文獻

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