臺灣博碩士論文加值系統

本論文的內容提出適用於在超寬頻通訊系統的新式天線設計，利用偶極天線為主要的設計構思。在主體結構上採用上下對稱的方式設計，並且將天線結構印刷在雙面的微波基板（FR4）上。本研究對新式的天線結構，找出控制天線效能的參數並且分析與調整天線結構的參數，了解超寬頻在新式的偶極天線中如何被實現。第一個設計中將提到，根據偶極天線的理論，設計ㄧ新式雙偶極天線；實驗結果顯示此設計可以被實現，其具有3~11GHz的操作頻寬以及1.7~4.6dBi的增益。第二個設計則是使用V型偶極天線為主要探討對象。根據V型偶極的高增益特性，設計ㄧ雙面印刷式V型偶極天線，操作頻寬為3.08~11GHz以及最大增益7.4 dBi。

Two novel designs, printed ultra-wideband (UWB) dipole antennas are presented in this article. Unlike the conventional traditional antennas, the proposed antenna had one half of radiating element dipole antenna printed on each side of a microwave substrate respectively. The proposed antenna which were fed by a 50Ω microstrip line, generate the desired ultra-wideband operation. One of proposed designs is a double dipole antenna for operations bandwidth over 3~11 GHz. Antenna gain of this design is between 1.7~4.8dBi. The second design is proposed by using Vee dipole structure. The operation bandwidth is over 3.08~11GHz and its maximum gain is 7dBi. The experimental results indicate the both designs are suitable for ultra-wideband communication systems.

中文摘要…………………………………………………………………Ι
英文摘要…………………………………………………………………Π
誌謝……………………………………………………………………III
文字目錄………………………………………………………………IV
圖形目錄………………………………………………………………VI
表格目錄…..………………………………………………………VIII
第一章 序論（Introduction）
1.1概述…………………………………………………………….1
1.2研究動機……………………………………………………….4
1.3文獻導覽……………………………………………………….4
1.4內容提要……………………………………………………….5
第二章 適用於超寬頻通訊系統之俱有串接饋入雙面印刷式雙偶極天線
（A Double-Sided Printed Double Dipole Antennas With Series Feed for UWB Communication Systems）
2.1 概述……………………………………………………………8
2.2 微帶線特性……………………………………………………8
2.3 天線設計………………………………………………………9
2.4分析與討論…………...…………………………………….11
第三章 適用於超寬頻通訊系統之雙面印刷式V型天線
（A Double-Sided Printed Vee Dipole Antenna for UWB Communication Systems）
3.1概述…………………………………….……………......27
3.2 V型偶極天線特性…………………………….…………….27
3.3 天線設計..……………………………………………..28
3.4 分析與討論…………………………………………… ...29
第四章 結論……………………………………………………...42
參考文獻（References）……………………………………………44
論文著作表（Publication List）…………………………………50
圖形目錄
Fig. 1-1 無線通訊技術傳輸特性比較圖…………………………7
Fig. 2-1 微帶傳輸線（a）幾何結構（b）電力線分佈…………13
Fig. 2-2 天線製作流程圖…………………………………………14
Fig. 2-3 雙面印刷式雙T型偶極天線結構………………………15
Fig. 2-4 長臂（l1）反射係數圖………………………………..16
Fig. 2-5 短臂（l2）反射係數圖………………………………..17
Fig. 2-6 間距（D）反射係數圖………..............................................18
Fig. 2-7 實驗與模擬之反射係數圖……………………………….19
Fig.2-8 天線增益圖……………………………………………..20
Fig.2-9 4GHz 遠場輻射場型圖…………………………………...21
Fig.2-10 7GHz 遠場輻射場型圖…………………………………22
Fig.2-11 10GHz遠場輻射場型圖……………………………23
Fig.2-12 (a) 4GHz 模擬場型(b) 7GHz 模擬場型(c) 10GHz 模擬場型.......24
Fig.2-13 電流分佈圖……………………………………………..25
Fig.3-1 V型偶極天線示意圖………………………………..32
Fig.3-2 V型偶極天線結構圖…………………………………..33
Fig.3-3 L1變化曲線圖………………………………………..34
Fig.3-4 W2變化曲線圖……………………………………35
Fig.3-5 W1變化曲線圖.................................36
Fig.3-6 L2變化曲線圖……………………………….37
Fig.3-7 實作與模擬圖…………………………………………38
Fig.3-8 天線增益圖…………………………………39
Fig.3-9 4GHz 遠場輻射場型圖………………………………...40
Fig.3-10 7 GHz 遠場輻射場形圖…………………………………..41
Fig.3-11 10 GHz 遠場輻射場形圖…………………………….42
表格目錄
Table. 1-1 耗電量比較表………………………………………….7
Table. 2-1 無線通訊標準所適用的頻段表…………………….26
Table. 2-2 基板板材規格..............................27
Table. 2-3 天線最佳參數表………………………….28
Table. 3-1天線最佳化參數…………………………..32

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