應用於4G行動通訊裝置之天線設計｜國立中央大學博碩士論文系統

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研究生：	簡鳳吟 FONG-YIN JIAN
論文名稱：	應用於4G行動通訊裝置之天線設計 Design of the Antenna for 4G Mobile Devices
指導教授：	丘增杰
口試委員:
學位類別：	碩士 Master
系所名稱：	資訊電機學院 - 電機工程學系 Department of Electrical Engineering
論文出版年：	2016
畢業學年度：	104
語文別：	中文
論文頁數：	66
中文關鍵詞：	行動通訊裝置、天線
相關次數：	點閱：11 下載：0
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本研究主要探討4G LTE頻段手機天線的小型化，故提出適用於手機裝置之天線設計，其可涵蓋LTE之操作頻寬。製作過程中主要會利用HFSS軟體來進行天線模擬與設計，並藉用網路分析儀測量實作天線的特性。
本天線設計於FR-4基板上，天線尺寸為15×30×1 mm3，目標天線以50毆姆同軸電纜做為天線之饋入結構，藉由加入適當SMD(表面黏著貼片)所構成的饋入網路以達成匹配效果的單極天線，接著從接地面延伸一條strip 透過電容耦合目標天線，以涵蓋低頻寬頻頻帶，而高頻路徑主要是饋入天線與短支的接地strip所產生。
使天線頻寬以-6dB以下反射損失的定義下達成在低頻帶可以涵蓋 698 MHz 至 990 MHz，可滿足LTE700/GSM850/GSM900之頻段要求。而高頻部分以-6dB以下反射損失定義下，使高頻頻帶部分為 1.64GHz 至 3.15 GHz，滿足GSM1800/GSM1900/UM-
TS/ LTE2300/LTE2500之頻寬範圍。

This study is mainly focused on the miniaturization of 4G-LTE band mobile phone antenna, and also a mobile device antenna for the LTE operation. The main production process will use HFSS software for antenna simulation and design, and the network analyzer for measuring the characteristics of the antenna.
Proposed antenna is designed is with FR-4 substrate. Antenna size is of 15×30×1 mm3, with 50 ohm coaxial cable as the antenna feed-in structure. Feeding network with the SMD (Surface Mount Device) is constituted to achieve the matching. A strip extending from the ground surface results in the capacitive coupling effect, so the low frequency band of the antenna is broadened. A feeding structure and a short strip provide the high-frequency path.
The low frequency band denotes the range from 698 MHz to 990 MHz. It can provide the requirements of the LTE700/GSM850/GSM900 applications. And the high frequency band is referred to the range from 1.64 GHz to 3.15 GHz. It can provide the requirements of the GSM1800 / GSM1900 / UMTS/LTE2300/LTE2500 applications.

目錄
摘要    v
Abstract    vi
致謝    vii
目錄    viii
圖目錄    x
表目錄    xiii
第一章 緒論    1
1-1 研究背景    1
1-2 研究動機與目的    2
1-3 文獻回顧    3
1-4 本文架構    5
第二章 天線理論    6
2-1 概述    6
2-2 天線特性參數    6
2-2-1 天線效率    6
2-2-2 輻射增益    7
2-2-3 指向性    8
2-2-4 天線極化    9
第三章 平面式4G天線之設計與分析    10
3-1 概述    10
3-2 具有匹配電路平面式天線之設計流程    10
3-2-1 初始天線之架構選定    10
3-2-2 前端匹配電路之選定流程    13
3-2-3 前端匹配電路之選定    17
3-3 低頻天線之架構與設計分析    18
3-4 高頻天線之架構與設計分析    21
3-5 相關參數探討    25
3-5-1 平面式4G天線隨a參數變化    26
3-5-2 平面式4G天線隨b參數變化    27
3-5-3 平面式4G天線隨c參數變化    29
3-5-4 平面式4G天線隨d參數變化    30
3-5-5 平面式4G天線隨e參數變化    31
3-5-6 平面式4G天線隨f參數變化    32
3-5-7 平面式4G天線隨C1參數變化    33
3-5-8 平面式4G天線隨L1參數變化    34
3-5-9 平面式4G天線隨L2參數變化    35
3-6 結語    36
第四章 模擬與量測結果及討論    37
4-1    概述    37
4-2 平面式4G天線之模擬與量測    39
4-2-1 返回損耗之分析    39
4-2-2 輻射場型    40
4-2-3 增益與輻射效率    46
4-3 結論    48
第五章 總結    49
參考文獻    50
附錄    52


                                

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