臺灣博碩士論文加值系統

　　本論文利用共平面波導饋入結構，設計分別應用於WLAN與UWB頻段的天線。利用電感式槽孔混合單極天線作法，分別達到WLAN所需的頻段，單極天線主要用來激發出WLAN所需的低頻部份，而電感式槽孔則是激發高頻部份，且均有良好的阻抗匹配，激發出兩個頻段2.4/5.5GHz，涵蓋WALN所需要的範圍2.4GHz ~ 2.475GHz與5.15GHz ~ 5.85GHz，天線最大輻射增益達到2.84dBi/5.85dBi。另外在UWB部份，由一個六邊形的寬槽孔與一個梯形單線天線所組成。50 線饋入一個梯形單極天線，再藉由調整六邊形槽孔的參數設定，可以達到UWB所要求3.1GHz ~ 10.6GHz的要求，具有超寬頻、良好增益與輻射場形等優點。

　　In this paper, the use of coplanar waveguide feed structure, a design used in WLAN and UWB band antenna. The use of inductive Slot-Monopole hybrid antenna to achieve WLAN band, monopole antenna is mainly used to stimulate the low-frequency part of the required of WLAN, and inductive slot is to stimulate high-frequency part of WLAN, have a good impedance matching, 2.4/5.5GHz dual-band excitation, WALN needed to cover the scope of 2.4GHz ~ 2.475GHz and 5.15GHz ~ 5.85GHz, maximum radiation gain of the antenna 2.84dBi/5.85dBi. Another part of the UWB, composed of a hexagonal slot and a wide trapezoidal monopole. A hexagonal slot antenna is excited by a 50-Ω CPW with a wide trapezoidal monopole, adjusting the parameters of hexagonal slot configuration, can achieve the required UWB requirements 3.1GHz ~ 10.6GHz, with ultra-wideband, good gain and radiation field.

中文摘要...............................................................................................................IV
英文摘要................................................................................................................V
誌謝.................................................................................................................. VI
目錄.................................................................................................................VII
圖目錄.............................................................................................................. IX
表目錄.............................................................................................................. XI
第一章 序論..................................................................................................... 1
1.1 前言...................................................................................................... 1
1.2 相關研究.............................................................................................. 4
1.3 論文概要.............................................................................................. 5
第二章 基本理論............................................................................................... 6
2.1 共平面波導的輸入阻抗匹配................................................................. 6
2.2 天線的特性與參數的介紹.................................................................... 9
2.2.1 輻射場型(radiation pattern) ......................................................... 9
2.2.2 天線指向性和增益....................................................................11
2.2.3 天線的輻射效率、品質因素和頻寛......................................... 15
2.3 單極天線理論..................................................................................... 18
2.4 槽孔天線............................................................................................ 20
2.4.1 槽孔天線簡介........................................................................... 20
2.4.2 槽孔天線設計理論................................................................... 21
第三章 設計應用於WLAN 頻段共平面波導饋入天線.................................... 23
3.1 概述.................................................................................................... 23
3.2 天線設計............................................................................................ 25
3.2.1 天線設計概念........................................................................... 25
3.2.2 天線結構.................................................................................. 25
3.2.3 設計電感式槽孔....................................................................... 27
3.2.4 L 形單極天線............................................................................ 29
3.2.5 F 形單極天線............................................................................ 32
3.2.6 L 形單極天線外加寄生元件...................................................... 35
3.3 實驗及量測結果................................................................................. 39
3.3.1 電感式槽孔F 形單極天線........................................................ 39
3.3.2 電感式槽孔L 形天線附加寄生元件......................................... 43
3.4 結論.................................................................................................... 47
第四章 設計應用於UWB 共平面波導饋入天線.............................................. 48
4.1 概述.................................................................................................... 48
4.2 天線設計............................................................................................ 49
4.2.1 天線設計概念............................................................................ 49
4.2.2 天線架構.................................................................................. 50
4.2.3 設計梯形單極天線................................................................... 51
4.2.4 設計六邊形寬槽孔................................................................... 53
4.3 實驗及模擬結果................................................................................. 56
4.4 結論.................................................................................................... 61
第五章 結論..................................................................................................... 62
參考文獻.......................................................................................................... 63

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