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研究生:鄒敏
研究生(外文):ZOU MIN
論文名稱:緊湊布局之多天線解耦合技術開發
論文名稱(外文):Development of Decoupling Techniques for Compactly Deployed Antennas
指導教授:廖文照
指導教授(外文):Wen-Jiao Liao
口試委員:林丁丙周良哲劉適嘉朱輝南
口試委員(外文):Ding-Bing LinLiang-Zhe ChouShi-Jia LiuHuy Nam Chu
口試日期:2019-07-08
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電機工程系
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:2019
畢業學年度:107
語文別:中文
論文頁數:81
中文關鍵詞:WLAN天線天線分集技術傳導電流天線雙頻解耦合
外文關鍵詞:WLANantenna diversityconduction emission currentdual-band decoupling technique
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由於行動裝置傳輸速率提升的要求,為支援高階無線通訊技術,須將多支天線擺放於有限的空間之內,因此需解決天線之間的耦合問題。
本論文提出一款緊湊式布建之雙天線解耦合架構,可以在筆電基底或平板側邊設置槽孔環境來進行解耦合。首先利用雙天線場型分集的特性,微調天線間平行錯位的距離,減少輻射耦合的影響;再來搭配建構之槽孔環境,延長天線的傳導電流路徑,使其相互抵消,達到降低傳導耦合的效果。使緊湊放置之雙天線隔離度提升。吾人透過實作,量測S參數與輻射效率,驗證解耦合架構的效果。
以上述解耦合技術為基礎,吾人設計一款適用於解耦合槽孔的WLAN雙頻段IFA天線,並在槽孔內新增高頻傳導電流路徑的不連續點,使高頻段的電流也能經由解耦合槽孔延長傳導路徑,達到抵消的效果。因此於WLAN雙頻段中,皆能觀察到耦合零點,驗證雙頻解耦合的效果。實做的反射係數、隔離度與輻射效率皆達到筆電產品應用的標準。
Due to the increased requirements of wireless transmission rate, multiple antennas on mobile devices must be placed in a limited space to support advance wireless communication technologies. Therefore, the coupling issue between antennas must be resolved.
This paper proposes a compact dual-antenna decoupling architecture that can work at a slot environment set up at the notebook’s side. In order to increase the isolation of two compactly displaced antennas, pattern diversity is first used to reduce radiation coupling. Then, to reduce conduction emission coupling, conduction currents are canceled by extending their paths in the loop environment. Measured S-parameter and radiation efficiency spectra verify that the decoupling architecture can effectively improve the isolation.
Based on the propose decoupling technique, a dual-band WLAN IFA antenna is designed, which is suitable for decoupling uses in slot environment. Furthermore, by adding geometric discontinuities for the high-frequency conduction current path in the slot, the currents can achieve a mutual canceling effect. Therefore, decoupling nulls can be observed in both WLAN bands. Through implementation, the performance of the compact antenna built in the decoupling slot is verified. The reflection coefficient, isolation and radiation efficiency performances can satisfy the application specifications of notebook products.
摘要
Abstract
目錄
圖目錄
表目錄
第一章 緒論
第二章 緊湊布局之多天線解耦合技術開發
第三章 雙頻天線設計與雙頻解耦合技術開發
第四章 結論
參考文獻
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