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研究生: 林柏宏
Bo-Hong Lin
論文名稱: 應用於金屬機殼筆電環境之無線區域網路與行動通訊網路天線設計
WLAN and WWAN Antenna Designs for Laptops with Metal Enclosures
指導教授: 廖文照
Wen-Jiao Liao
口試委員: 馬自莊
Tzyh-Ghuang Ma
侯元昌
Yuan-Chang Hou
鍾明桉
Ming-An Chung
學位類別: 碩士
Master
系所名稱: 電資學院 - 電機工程系
Department of Electrical Engineering
論文出版年: 2023
畢業學年度: 111
語文別: 中文
論文頁數: 85
中文關鍵詞: Wi-Fi 6E開槽孔天線LTEWWAN可重置天線筆電天線
外文關鍵詞: Wi-Fi 6E, open-ended slot antenna, LTE, WWAN, reconfigurable antenna, notebook antenna
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  • 本篇論文提出兩款適用於筆電環境的天線,一款操作於Wi-Fi 6E頻段,天線結構簡單且美觀,在未使用集總元件的條件下,就能涵蓋Wi-Fi 6E頻段。另一款天線操作於LTE、N77、N78的WWAN頻段,運用集總元件與射頻開關做切換,可涵蓋多個頻段。兩款天線皆符合筆電環境的需求。
    論文中的第一款天線為應用於金屬筆電環境之Wi-Fi 6E一字形開槽孔天線,天線尺寸為31.5 × 7.6 × 3 mm3。該設計利用開槽孔架構,使用0.25波長共振提供2.45 GHz模態,並且用環型結構饋入,增加高頻模態。以側邊加入的寄生槽孔與2.45 GHz之三倍頻共同涵蓋WLAN高頻。天線外觀上為完整的一字型,擁有簡單結構且兼具美觀外型。
    第二款天線為應用於筆電環境之多頻段開槽孔天線,天線尺寸為78.65 × 6 × 6 mm3。天線主要透過槽孔並聯之電感形成虛短路,使槽孔天線的0.5波長雙端開路共振模態變成0.25波長的單端開路槽孔共振模態,一側做為單純單端開路槽孔共振,另一側則做為T型槽孔引發多模態。在兩開口處以導通並聯電容與否的方式,對操作頻段做切換,可達到涵蓋大部分之4 G / 5 G頻段。


    This thesis proposes two antenna designs applicable to laptop environments. The first antenna operates in the Wi-Fi 6E frequency band and no lumped elements are used. The simple structure consists of an open slot. and its performance satisfies the design requirements for laptop antennas. The second antenna operates in the LTE (Long Term Evolution), N77, N78, and WWAN frequency bands. It uses lumped elements and an RF switch to cover multiple frequency bands. This antenna also meets the design requirements for laptop antennas.
    The first antenna sizes are 31.5 × 7.6 × 3 mm3. The slot structure provides a quarter-wavelength resonant mode that covers the 2.45 GHz band. A loop-feeding structure is used to generate higher frequency modes. A parasitic slot is placed on the side to excite an additional mode in the 6.04 GHz band. The slot antenna has a relatively simple structure that can be easily integrated into the laptop enclosure.
    The second antenna is a multi-band open slot antenna. The sizes are 78.65× 6 × 6 mm3. The slots are connected in parallel with an inductor to form a virtual short circuit, transforming the half-wavelength mode into a quarter-wavelength mode. One side acts as a simple single-ended open slot, while the other side acts as a T-shaped slot that hosts multiple modes. The frequency band can be switched by selecting different capacitor loading, which are connected in parallel at the two openings. Most of the 4G/5G frequency bands can be covered with this antenna.

    摘要 I Abstract II 目錄 III 圖目錄 V 表目錄 VIII 第一章 緒論 1 1.1 研究背景 1 1.2 論文組織 2 第二章 應用於筆電環境之Wi-Fi 6E之一字型開槽孔天線設計 4 2.1研究動機 4 2.2一字型開槽孔天線設計 6 (a) 天線架構與設置環境 6 (b) 一字型開槽孔結構 9 2.3天線設計參數分析 13 (a) 環形結構L4、W4 14 (b) 寄生槽孔長度L9 16 (c) 調整金屬W6、W7、W8寬度降低高階模態頻率 17 2.4筆電環境對天線的效能影響分析 19 2.5天線實作與效能驗證 23 (a) 金屬鋁機殼轉為FR4基板 23 (b) 天線實作 26 2.6小結 35 第三章 應用於筆電環境之LTE / WWAN開槽孔天線設計 36 3.1 研究動機 36 3.2 可重置多頻開槽孔天線設計 37 (a) 天線架構與設置環境 37 (b) 可重置多頻開槽孔天線結構 39 3.3 可重置多頻開槽孔天線設計參數化分析 48 (a) 槽孔長度L1與L7 48 (b) 短路金屬路徑長L11 50 (c) T型槽孔開口寬L5 51 (d) 二極體與電容位置L6 52 (e) 射頻開關擺放位置L8 54 3.4 筆電環境對槽孔天線影響之效能分析 55 3.5 天線實作與效能驗證 56 3.6 小結 65 第四章 結論 66 參考文獻 69 附錄一 75 附錄二 83

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