臺灣博碩士論文加值系統

智慧型基地台已經成為未來的主流，如何提升良好的室內覆蓋率，達到良好的通訊品質與資料傳輸速率，為各界共同努力的目標。廣設小型基站雖可提升網路速率，但會相互干擾使效能打折，又會增加成本等問題，造成5G網路發展的瓶頸，這些問題的解決是刻不容緩的。因此更進一步探究的原因。
本文提出三組小型天線，第一組天線的反射板不需要隔著空氣層即可提升天線的增益及效率，以緩變阻抗結構來擴大偶極天線的阻抗帶寬。後端將單極天線金屬面作為反射板，前端搭配導向器以提升天線的增益，形成端射型結構。使天線的反射器、激發源、導向器間距小於一般八木天線尺寸。第二組天線使用槽孔與單極結構，達到單輻射體共平面雙激發功能，反射板可提升天線的增益、指向性以及貼片天線的效率。第三組天線利用漸變式阻抗來擴大阻抗帶寬，而蜿蜒微帶線可延伸電流路徑，激發低頻共振有效縮小體積，採用八木天線形式可提升天線指向性與增益，當中利用偶極天線型式設計，分別搭配蝕刻L形狹槽以及指叉型結構達成共振雙頻段性能，最後加入數位相移晶片並搭配邏輯電路控制，可調整天線單元相位狀態，達成波束成形效果，其中亦改良結構為金字塔狀，並運用傾斜配置提升天線單元間距及隔離度。
本文置重點於設計並整合小型基地台內部天線，期望達成波束成形效果滿足未來趨勢，提出多天線均具有增加隔離度配置設計、訊號覆蓋率提升與波束集中優勢，達高效率、節能效果。

The prevalence of smart small cell for 5G wireless network, improving indoor coverage to achieve communications quality and data rate, that has become an important challenge for wireless communication.However,Array antenna usually use limited size, which in expensive cost and huge nembers of device. Thus, this thesis can investigate by three usage of end fire antennas. A signal on a antenna element that director is poor does not reflecter to improve the gain. The dipole is used to antenna exciter, Define a slow impedance for design parabolic exciter structure that attractive for narrow bandwidth. It is fed from connected to a monopole ground strip by mounting the parasitic for uniplanar antenna conformally on exciter structure to enhance the gain which obtain a end fire performance of the proposed antenna. The resonance as a microstrip fed slot shaped antenna and another slot sharp, respectivity. The slot and monopole antenna of coplanar double resonates could be attributed air layer between the slot and reflecter to improve the gain superposed electric field. A novel etch fork like meandering conducting antenna resonance could be shifting the original resonant mode in addition to the generation of a new resonance. To futher wide the impedance bandwidth and impove the directivity at parasitic strip. Adding the parasitic strip brings a capacitive coupling between the exciter and directer. The corn structure is employed to relies isolation between the two antenna ports Which demonstrates a compact size. According to the antenna array dimention set to be about 0.5  to obtained impedance matching.

中文摘要 i
英文摘要 ii
致 謝 iii
目 錄 iv
表 目 錄 vi
圖 目 錄 vii
第一章 序論 1
1.1研究背景 1
1.2研究目的 5
1.3文獻導覽 7
1.4論文題要 8
第二章 曲折狹縫雙頻偶極天線 9
2.1前言 9
2.2基地台架構 10
2.3天線原理與設計 15
2.4實驗結果與討論 22
2.5結論 37
第三章 多頻C形槽孔天線 38
3.1前言 38
3.2天線原理與設計 38
3.3實驗結果與討論 46
3.4結論 53
第四章 指叉形狹槽漸變式阻抗雙頻天線 54
4.1前言 54
4.2天線原理與設計 54
4.3實驗結果與討論 62
4.4結論 76
第五章 相控陣列天線設計 77
5.1前言 77
5.2微帶線與相控陣列天線設計 77
5.3相移器操作與規劃 81
5.4實驗結果與討論 86
第六章 結論與未來發展 109
參考文獻 111

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