臺灣博碩士論文加值系統

本篇論文研究的天線是應用於WLAN/WiMAX頻段的共平面波導單極天線。最先由一根漏斗狀的單極天線為基礎，並在天線上挖出兩條倒L型挖槽以及一條V型挖槽，並藉由這兩條倒L型挖槽以及V型挖槽來產生我們所需的三個頻段。應用頻段為2.4-2.48 GHz, 3.44-3.94 GHz, 5.15-5.8.5 GHz，覆蓋2.4 G/5.2 -GHz WLAN頻段以及3.5/5.5-GHz WiMAX。

In this paper, a coplanar waveguide (CPW) tri-band monopole antenna with slits is designed for WLAN/WiMAX applications. The antenna is based on a funnel shape monopole antenna with two inverted-L slots and a V-shape slot. We focus on those three slots to create tri-band frequencies. The required frequency bands are 2.4-2.48 GHz, 3.44-3.94 GHz, and 5.16-5.68 GHz, which cover the 2.4 G/5.2 GHz WLAN band and 3.5/5.5 GHz WiMAX.

目錄
封面內頁
簽名頁
中文摘要 .............iii
Abstract............. iv
誌謝.............v
目錄.............vi
圖目錄.............viii
表目錄.............x
第一章 緒論.............1
1.1 前言.............1
1.2 無線通訊發展.............1
1.3研究動機.............3
1.4 文獻回顧.............3
第二章 天線基本原理.............4
2.1 天線概論.............4
2.2 天線參數.............5
2.2.1 反射係數(Reflection Coefficient).............5
2.2.2 天線增益(Gain)...6
2.2.3 輻射場型.............7
2.3 天線類型.............7
2.3.1 偶極天線.............7
2.3.2 單極天線.............8
2.3.3 槽孔天線.............9
2.3.4 貼片天線.............9
2.3.5 八木天線.............10
2.3.6 迴路天線.............11
第三章 應用於WiMAX/WLAN之挖槽三頻單極天線.............12
3.1 天線結構與分析.............12
3.2天線分析流程.............14
3.3 天線分析.............15
3.4 天線變寬.............17
3.5 以漏斗形分析寬頻天線.............19
3.6 倒L挖槽分析.............24
3.7 V型挖槽分析.............29
3.8 最終結構.............33
第四章 量測結果.............36
4.1 第一次量測.............36
4.2 加長接地面長度.............37
4.3 輻射場型的模擬與測量.............39
第五章 結論.............42
參考文獻.............43

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