English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 51510/86705 (59%)
造訪人次 : 8272683      線上人數 : 97
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/102657


    題名: 一種應用非對稱結構提升MIMO天線隔離度的研究
    其他題名: A research of improving MIMO antenna isolation by the use of non-symmetrical structure
    作者: 邱恩農;Chiu, En-Nung
    貢獻者: 淡江大學電機工程學系碩士班
    李慶烈;Li, Ching-Lie
    關鍵詞: 隔離度;非對稱結構天線;雙頻;多輸入多輸出天線;dual-band;non-symmetrical-structure;MIMO-antenna
    日期: 2014
    上傳時間: 2015-05-04 10:01:15 (UTC+8)
    摘要: 針對一個小型行動裝置的MIMO天線(e.g.2X2),在空間有限的情況下,本論文提出一種雙頻的MIMO天線,且利用非對稱的結構來提高其隔離度的設計。 此MIMO天線由兩個具有類似結構(但有差異)的天線元件組成,天線元件的結構為一個以偶極天線當負載的狹縫(slit),其中激發槽狹縫將負責高頻帶(5GHz-6GHz)的輻射,偶極負載則負責低頻帶(2.4GHz)的輻射,另一個天線元件則反其道而行,其激發狹縫負責低頻帶的輻射,偶極負載則負責高頻帶的輻射。
    本論文針對厚度為0.8mm的FR4基板(相對介電係數為4.4)進行天線設計,模擬與實驗結果皆顯示,此一創新結構將可使隔離度更加提升(相較於對稱結構),其原因在於負責相同頻率輻射的兩個天線輻射體,具有不同的幾何結構(分別為狹縫及偶極金屬導線),導致輻射體之間的互耦量減少之故;此外,針對此一雙頻的MIMO天線,吾人使用一種系統化的天設計流程,此一流程是結合了直交表(orthogonal array; OA)和響應表面模型(response surface modeling ; RSM)的技術,非常適合針對此一非對稱高隔離度MIMO天線進行優化設計。
    For the design of MIMO antennas (2x2 for examples) of a small mobile device with limited space, this thesis proposes a dual-band MIMO antenna design, and the use of non-symmetrical structure to improve the isolation of the elements. The proposed MIMO antenna consists of two similar (but yet different) elements. Both elements are in the form of the slit loaded with a dipole antenna. For one element the slit is responsible for the high-band (5GHz-6GHz) radiation, and the dipole is responsible for the low-band (2.4GHz) radiation. For the other element, the design logic is the opposite, of which the slit is responsible for the low-band (2.4GHz) radiation, and the dipole is responsible for the high-band (5GHz-6GHz) radiation.

    In this thesis, the above MIMO antenna is assumed to reside on an FR4 board of the thickness of 0.8mm (relative dielectric constant of 4.4). Both simulated and experimental results show that the innovative structure can improve the isolation (as compared to the symmetric structure). Since the antenna radiators that are responsible the same frequency band have different geometries, and they are slit and dipole wire, respectively, such that the mutual coupling between them is reduced. Furthermore, for the proposed dual-band MIMO antenna, a systematic scheme is employed to carry out the antenna design instead of trial and error. The design scheme utilizes both the technology of orthogonal array (OA) and response surface model (RSM) and is well suited for the optimization design process to achieve the high isolation for the asymmetric MIMO antenna.
    顯示於類別:[電機工程學系暨研究所] 學位論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    index.html0KbHTML164檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋