臺灣博碩士論文加值系統

本論文提出三支代表性之天線(非平衡式T型天線、平衡式帶線T型天線、平衡式微帶線T型天線)，將此三支天線分別放入機殼內部，分析機殼對於此天線的影響。三支天線均為T型結構，是以四分之一波長單極(monoploe)天線方式，分別作在相同玻璃纖維(FR4)基材上。製作的首要步驟先以電磁場數值方法軟體進行模擬，使三支天線能產生2 GHz之共振頻率。再分別將三支天線放入相同尺寸機殼內部，改變機殼尺寸，研究機殼設計於此三種天線之影響。另外，經由實作量測之驗證，來強化模擬結果之真實性。最終，可得到一些重要結論，來做為將天線放置於機殼中之設計參考。

In the thesis, three T-type antennas (unbalanced T-type antenna, microstrip-fed T-type balanced antenna, and strip-fed T-type balanced antenna) are proposed. These three antennas were placed inside a metal enclosure, and then the enclosure influence on the antenna performance were studied. Both simulated and measured results obtained confirm their accuracy.In addition, the discussion for the results may provide many useful guide-lines for practical applications.

封面內頁
簽名頁
授權書．．．．．．．．．．．．．．．．．．．．．．．．．iii
中文摘要．．．．．．．．．．．．．．．．．．．．．．．．iv
英文摘要．．．．．．．．．．．．．．．．．．．．．．．． v
誌謝．．．．．．．．．．．．．．．．．．．．．．．．．．vi
目錄．．．．．．．．．．．．．．．．．．．．．．．．．．vii
圖目錄．．．．．．．．．．．．．．．．．．．．．．．．． ix
表目錄．．．．．．．．．．．．．．．．．．．．．．．．． xii

第一章 緒論
1.1 前言．．．．．．．．．．．．．．．．．．．．1
1.2 研究動機與目的．．．．．．．．．．．．．．．4
1.3 章節概要．．．．．．．．．．．．．．．．．．5
第二章 Balun 電路
2.1 Balun 簡介．．．．．．．．．．．．．．．．．．6
2.2 平衡式元件優點．．．．．．．．．．．．．．．10
2.3 Marchand balun．．．．．．．．．．．．．．．12
2.4 新型Marchand balun．．．．．．．．．．．．．13
2.5 Broadside-edge coupled balun．．．．．．．．．．15
2.6 Coupled-line balun．．．．．．．．．．．．．．．17
2.7 DCL balun．．．．．．．．．．．．．．．．．．23
第三章 微帶天線與天線設計
3.1 微帶天線介紹 ．．．．．．．．．．．．．．．25
3.2 微帶傳輸線．．．．．．．．．．．．．．．．．25
3.3 天線基本理論 ．．．．．．．．．．．．．．．28
3.4 非平衡式T型天線設計．．．．．．．．．．．．34
3.5 平衡式帶線天線設計 ．．．．．．．．．．．．36
3.6 平衡式微帶線天線設計．．．．．．．．．．．．37
第四章 機殼對天線的影響
4.1 金屬平面對天線的影響 ．．．．．．．．．．．39
4.2 機殼對天線的影響．．．．．．．．．．．．．．46
第五章結論．．．．．．．．．．．．．．．．．．．．．．．52
參考文獻．．．．．．．．．．．．．．．．．．．．．．．．53

[1] 東名，“行動通訊發展＂，文魁資訊股份有限公司，2002.
[2] Min Sze Yap, Lenna Ng, and Sheel Aditya, “A Triple Band Antenna for GSM and GPS Application,” IEEE vol. 2 pp. 1119-1123, December 2003.
[3] Hyronjin Lee, Hun Nam, Yeongseog Lim, “A Design of Printed Square Loop Antenna for Omni-directional Radiation Patterns, “ IEEE Radio and Wireless Conference, pp. 253-256, August 2003
[4] M.A. Salah-Eddin and A.M.E Safwat, "Defected-ground coupled microstrip lines and its applican in wideband balun", IET Microw. Antennas Propag., Vol. 1, No. 4, August 2007
[5] 鍾順時, "微帶天線倫理與應用",西安出版社,1991
[6] 陳泓瑞, "應用在現代行動通訊之平衡式饋入平面天線",碩士 論文,大葉大學電信工程研究所, 2007
[7] 林雅菁, "應用於現代行動之平衡式饋入寬頻圓盤天線",碩士論文, 大葉大學電機工程研究所,2009
[8] Steven Yu，“網路分析儀於平衡/非平衡/多埠/內箝元件的量
測”，2005.
[9] B.Bhat and S.K. Koul, Stripline like transmission lines for Microwave Integrated Circuits. New Youk, NY: John Wiley Sons, 1989.
[10] Jong-Wook Lee, Kevin J. Webb, “Analysis and design of low-loss planar microwave baluns having having three symmetric coupled lines,” IEEE Microwave Symposium Digest, vol. 1, pp. 117-120, June 2002.
[11] Stephen H. Hall, Garrett W. Hall, James A. McCall, “High-Speed Digital System Design,” John Wiley & Sons, 2000, Ch. 3.
[12] “Agilent E5070A/E5071A ENA Series RF Network Analyzers
User’s Guide,” Second Edition, Agilent Part No. E5070-90010,Agilent Technologies, April 2002.
[13] 張盛富、戴明鳳，“無線通信之射頻被動電路設計”，全華科技圖書股份有限公司，2003.
[14] Cheng-Nan Chiu and Wen-Chang Hsu, “A balanced T-shaped antenna foe 3G mobile handsets foe WLAN,” Microwave and Optical Technology Letters, vol. 48, pp. 131-133, January 2006.
[15] Constantine A. Balanis, “Antenna Theory Analysis and Design,” Third edition, John Wiley & Sons, Inc., 2005.
[16] David K. Cheng, “Field and Wave Electromagnetics,” Secondedition, Addison-Wesley, 1989