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研究生:李柏均
研究生(外文):LI, BO-JUN
論文名稱:新式交叉式偶極天線在5G小基站的性能分析
論文名稱(外文):The study of new cross-dipole antenna at 5G small cells
指導教授:洪東興洪東興引用關係
指導教授(外文):HUNG, DUNG-SHING
口試委員:高誌陽紀俞任
口試委員(外文):KAO, CHIH-YANGCHI, YU-JEN
口試日期:2022-07-28
學位類別:碩士
校院名稱:銘傳大學
系所名稱:電腦與通訊工程學系碩士班
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:2022
畢業學年度:110
語文別:中文
論文頁數:71
中文關鍵詞:5G小基站圓極化(CP)交叉偶極天線雙層反射腔電抗片
外文關鍵詞:5G small cellCP(circular polarization)cross-dipole antennadouble-layer reflector cavitymetal reactance sheets
相關次數:
  • 被引用被引用:1
  • 點閱點閱:184
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  • 下載下載:29
  • 收藏至我的研究室書目清單書目收藏:0
本研究是針對符合頻段位於第五代行動通訊規範內1.7 ~ 3.8 GHz頻段的5G小基站天線進行拓寬軸比(axial ratio@AR)的性能分析。研究之天線為具有雙層反射腔的平面型交叉偶極天線(cross-dipole antenna),該天線總體尺寸為0.86 λ0 × 0.86 λ0 × 0.36 λ0,其中λ0是CP(circular polarization)工作頻段中間值(3 GHz)的自由空間波長,測得的3 dB軸比頻寬為66.7% (2.0 ~ 4.0 GHz),-10 dB阻抗頻寬為79.4% (1.9 ~ 4.4 GHz)。本研究將其修改為商用基板材質FR4並在原天線上增加金屬電抗片使得3 dB軸比頻寬百分比增加至89.9% (1.59 ~ 4.19 GHz),-10 dB阻抗頻寬百分比增加至81.8% (1.56 ~ 3.72 GHz),目標頻段內增益皆在6 dBi以上,輻射場型為指向性。本文將詳細說明該天線之設計、模擬與改善過程、相關性能分析與結果。
This project is to analyze the performance of the axial ratio (axial ratio@AR) of 5G small cell antenna in the 1.7 ~ 3.8 GHz frequency band within the specification of the fifth-generation mobile communication. The antenna consist of a planar cross-dipole antenna with a double-layer reflector cavity. The overall size of the antenna is 0.86 λ0 × 0.86 λ0 × 0.36 λ0, where λ0 is the free-space wavelength of the middle value (3 GHz) of the CP (circular polarization) operating frequency band. The impedance bandwidth of the original cross-dipole antenna is 79.4% (1.9 ~ 4.4 GHz) at -10 dB, and the 3 dB axial ratio bandwidth is 66.7% (2.0 ~ 4.0 GHz). In this study, the material of the commercial substrate was changed to FR4 and a series of metal reactance sheets were added to the original cross-dipole antenna in order to improve their performance. The results show that the percentages of the -10 dB impedance bandwidth and 3 dB axial ratio bandwidth were increased to 81.8% (1.56 ~ 3.72 GHz) and 89.9% (1.59 ~ 4.19 GHz), respectively. The gain in the target frequency band is more than 6 dBi. The new design modified planar cross-dipole antenna also demonstrates a high-directivity performance. This article will explain in detail the improvement process, related performance analysis and also results of the new antenna.
摘要 i
Abstract ii
目錄 1
圖目錄 3
表目錄 6
第一章 研究動機與目的 7
1.1 研究動機 7
1.2 研究目的 7
1.3 論文架構 8
第二章 文獻探討 9
第三章 理論分析 16
3.1 偶極天線 16
3.2 印刷偶極天線 16
3.3 交叉偶極天線 18
第四章 研究方法 21
4.1 無電抗片 22
4.1.1 基板材質 22
4.1.2 基板長寬 25
4.2 內側電抗片 28
4.2.1 新增金屬電抗片(一片) 28
4.2.2 修改電抗片大小Wb(一片) 30
4.2.3 修改電抗片間隙Wg(一片) 32
4.2.4 修改電抗片方位Loc(一片) 33
4.2.5 兩片金屬電抗片 35
4.2.6 四片金屬電抗片 37
4.2.7 各參數統計圖 39
4.2.8 實測與模擬值的比對 43
4.3 外側電抗片 47
4.4 反射器 51
4.4.1反射器類型 51
4.4.2雙層反射腔的大小H2&W2 54
4.4.3雙層反射腔的高度Hf 56
4.5 天線實測 58
4.5.1 六電抗片天線的第一次實測 58
4.5.1 加大基板後的第二次實測 61
第五章 結論與未來展望 66
參考文獻 67
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