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    Please use this identifier to cite or link to this item: http://ccur.lib.ccu.edu.tw/handle/A095B0000Q/425

    Title: 應用於第五代行動通訊之領結陣列天線與電磁平面鏡設計;Design of Bow-tie Phased Array Antennas and Electromagnetic Surfaces for 5th-Generation Mobile System
    Authors: 吳誌偉;WU, CHIH-WEI
    Contributors: 電機工程研究所
    Keywords: 反射型陣列天線;波束成形;相位陣列天線;領結天線;第五代行動通訊;電磁平面鏡;beamforming;phased array;bow-tie antenna;5th-generation mobile communication system;reflectarray;electromagnetic surface
    Date: 2017
    Issue Date: 2019-07-17
    Publisher: 電機工程研究所
    Abstract: 本論文設計一應用於第五代行動通訊之相位陣列天線,參考華為(Huawei)提出的5G系統原型將陣列天線之操作頻率設計於3.5 GHz,天線單元採領結天線,並將其擴展為由64個天線單元組成之4×16相位陣列天線,以增加波束指向性與提升陣列增益。利用掃描單元場型量測法(Scanning Element Pattern Measurement Approach)經由量測陣列中各天線單元場型進而合成出陣列波形,其量測結果分別為:陣列最大增益為20 dBi,此外,當相位差改變範圍從?160度至+160度時,波束掃描範圍可從?57度至+57度。論文另一主題為印刷電路板電磁平面鏡設計,採用擁有寬可調反射相位範圍之具延遲線微帶電磁單元來增進電磁平面鏡的設計彈性,利用電磁模擬軟體驗證可降低交叉極化的子陣列中電磁單元擺放模式。基於印刷電路板反射面陣列天線的設計理論獲取每一單元所需之反射相位,藉由改變電磁單元之延遲線長度實現對應之反射相位,而達到波束成形之效果,並通過電磁模擬軟體驗證實際整體電磁平面鏡之特性。最後為檢測所研製電磁平面鏡可用性,針對選定之入射角度(30度與45度)進行不同反射角度之電磁平面鏡實現與量測。量測與電磁模擬結果呈現相當一致的吻合度。
    In this thesis, the phased array antennas applicable to the fifth generation (5G) mobile systems are designed. Based on the 5G radio prototype implemented by Huawei, the operation frequency of the proposed phased array antennas is selected at sub-6GHz (i.e. 3.5 GHz). The bow-tie antenna is utilized as the antenna element constituting the 4×16 phased array antenna to enhance the beam directivity and increase the array gain required by 5G communication.Through measuring the gain pattern of individual element composing the array, the beam-forming and beam-steering characteristic can then be synthesized by scanning element pattern measurement approach. The measurement results show the maximum array gain is 20 dBi. In addition, when the progressive phase shift between the adjacent antenna is adjusted from ?160° to +160°, the corresponding beam directions can be scanned from +57° to ?57° thus validating the beam-steering. The other topic of this thesis is the design and implementation of printed-circuit board electromagnetic surfaces. The microstrip electromagnetic elements with delay lines possessing wide adjustable reflection phase range are utilized to improve the design flexibility of the electromagnetic surfaces. Based on the theory of the reflectarray, the phase distribution of elements can be acquired and the required reflection phase shift can be fulfilled by adjusting the physical delay lines thereby achieving the beam-forming capability. The characteristics of the electromagnetic surfaces are verified by full-wave electromagnetic simulator. Finally, to validate the practicality of the designed electromagnetic surfaces, several surfaces with different reflection angles are designed under two predetermined incident angles (30° and 60°). The measurement and simulation results show satisfactory agreement.
    Appears in Collections:[電機工程研究所] 學位論文

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