臺灣博碩士論文加值系統

本論文以傳統行進波天線理論為基礎，提出一種新穎的印刷式寬頻天線架構，此天線是利用四分之一波長的非平衡傳輸線作為輻射主體，並在非平衡傳輸線末端加載一個平衡的傳輸線終端，用以進行天線阻抗匹配的調整。本天線的輻射場型具有全向性，在LTE/WiMax系統中，電壓駐波比(V.S.W.R.)為 2:1的情況時，天線頻寬利用率皆能達到80%以上，可滿足目前無線通訊產品所需的寬頻天線設計需求。論文中將對天線的原理與設計流程進行詳述，並提供特性的模擬與實測結果做為比對分析用。

This paper present a novel compact wide-band planar antenna,the antenna designed by the traveling wave basic theory. The antenna is used by the Unbalanced Transmission line of quarter-wavelength and adding a balanced Transmission line terminal to match the Unbalanced Transmission line.
This antenna radiation pattern is omni-directional. Under the voltage standing wave ratio (V.S.W.R.) 2:1 of LTE/WiMax system, bandwidth effectiveness is up to 80 %. The method presented in this paper is applicable for current wireless communication system and future development.The design details and experimental results are presented and discussed in this paper, to provide the characteristics of the simulated and measured
results as the analysis.

摘要 i
ABSTRACT ii
致謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章　緒論 1
1.1研究動機與目的 1
1.2 常用的商業用頻段規格 3
1.3 內容大綱 4
第二章　天線的基本原理與特性 5
2.1 簡介 5
2.2 天線輻射場特性分析 5
2.2.1 電偶極輻射場 5
2.2.2 磁偶極輻射場 7
2.3 偶極天線 9
2.4單極天線 10
2.5 TAB 單極天線 12
2.6行進波天線 15
第三章 印刷式行進波天線探討 18
3.1 簡介 18
3.2 印刷式行進波天線實驗結果與分析 19
3.2.1 行進波天線高度之影響研究與分析 19
3.2.2 行進波天線長度之影響研究與分析 21
3.2.3行進波天線不平衡之地面影響研究與分析 23
3.2.4行進波天線末端平衡加載影響研究與分析 25
第四章 天線效能最佳化之設計 34
4.1 簡介 34
4.2 最佳化天線 35
4.2.1基本尺寸最佳化 35
4.2.2增加開路殘段尺寸調整 47
4.2.3增加TAB饋入和末端阻抗匹配尺寸調整 50
4.2.4最佳化印刷式行進波天線 55
第五章 結論 62
參考文獻 63

[1] C. A. Balanis, “Antenna Theory Analysis and Design,” John Wiley &; Sons, Inc.1982
[2] J. D. Kraus and R. J. Marhefka, “Antennas: for All Applications,” 3rd Edition,McGraw-Hill, 2003
[3] D.M. Pozar , “Microwave Engineering,” 2nd ed. New York: Wiley, 1998.
[4] David K.Cheng, “Field and Wave Electromagnetics 2/e, ” Prentice Halll, 1996.
[5] J. Michael Johnson and Yahya Rahmat-Samii, “The tab monopole,”IEEE Transactions on Antennas and Propagation , Volume 45, Issue 1, Jan. 1997 Page(s):187 – 188.
[6] I-Fong Chen and Ching-Wen Hsue, “Modified Tab Monopole for Triple-band Cellular Phone Antenna”, IEICE Trans. On Communications, Vol.E85-B, No.8,pp. 2135~2137, Aug. 2002.
[7] Jieh-Sen Kuo; Chih-Yu Huang; Jen-Yea Jan; “Planar monopole antenna for mobile phones on triple-frequency operation”, Antennas and Propagation Society International Symposium 2006, IEEE 9-14 July 2006 Page(s):1663 – 1666
[8] Kin-Lu Wong and Yi-Fang Lin, “Stripline-fed printed triangular monopole,”Electronics Letters, Vol 33, Issue 17, 14 Aug. 1997 Page(s):1428 – 1429.
[9] 劉佳泓,”具槽孔之非對稱三角形單極天線於筆記型電腦之應用”台灣科技大學碩士學位論文,2006年.
[10] Shyh-Tirng Fang and Jyh-Wen Sheen, “A planar triple-band antenna forGSM/DCS/GPS operations,” Antennas and Propagation Society International Symposium, 2001. IEEE, Vol 2, 8-13 July 2001 Page(s):136 – 139.
[11] R.B. Waterhouse and D. Novak,“Printed folded flared monopole antenna,”Electronics Letters, Vol 42, Issue 3, 2 Feb. 2006 Page(s):141 – 142.
[12] H.-C. Go and Y.-W. Jang, “Multi-band modified fork-shaped microstrip monopole antenna with ground plane including dual-triangle portion,” Electronics Letters,
Vol 40, Issue 10, 13 May 2004 Page(s):575 – 577.
[13] Clement T.H. Lim, Asim Ali and Jeffrey S. Fu, “A broadband printed triangular monopole,” Microwave Conference Proceedings, APMC 2005, Vol 4, 4-7 Dec.2005
Page(s):3 pp.
[14] K.P. Ray and Y. Ranga, “Ultra-wideband printed modified triangular monopole antenna,” Electronics Letters, Vol 42, Issue 19, Sept. 2006 Page(s):1081 – 1082
[15] John D. Kraus Ronald J. Marhefka, “Antennas For All Applications”, McGraw Hill Book Company, November, 2001
[16] R. D. Straw. “The ARRL Antenna Book, ” 20th Ed. American Radio Relay League, Inc., 2003.
[17] S. J. Orfanidis “Electromagnetic Waves and Antenna, ” 2008 :Rutgers Univ. Press
[18] 沈素梅,“適用於與非理想接地面平行之天線結構研究(以筆記型電腦為例)＂,碩士論文,景文科技大學電腦與通訊研究所,台北,2009.
[19] 梁勝傑,“天線效能與非理想接地效應之相關性研究＂,碩士論文,景文科技大學電腦與通訊研究所,台北,2009.
[20] 王文祥,“天線隔離度與非理想接地面效應之相關研究＂,碩士論文,景文科技大學電腦與通訊研究所,台北,2011.
[21] Zhengwei Du, Ke Gong, Member, IEEE, and Jeffrey Shiang Fu, Senior Member, IEEE“A Novel Compact Wide-Band Planar Antenna for Mobile Handsets”IEEE Transactions on Antennas and Propagation,Vol.54,No.2,February 2006