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應用於手機天線之蜿蜒式微帶天線設計 李永群、吳俊德

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應用於手機天線之蜿蜒式微帶天線設計 李永群、吳俊德

E-mail: 9802574@mail.dyu.edu.tw

摘 要

本論文探討兩個應用於現代行動通訊的平面天線:小型雙頻平面天線與雙寬頻印刷單極天線。小型雙頻平面天線由一呈喇 叭形單極天線加上套管所構成,此天線為有限接地之共平面饋入架構,而且能達到雙頻並包含DCS-1900/PCS/PHS

、WCDMA/IMT-2000和WLAN頻帶。寬頻印刷單極天線由矩形單極天線和能使頻寬變寬的梯形背平面導體構成,此天線 應用於無線區域網路(WLAN)和全球互通微波存取系統(WiMAX),並以探討天線各種結構參數下之反射係數、輻射場型及 電場分佈,與模擬和實際量測作比較,其結果證實了天線的寬頻和全向性。

關鍵詞 : 小型天線、雙頻天線、單極天線、DCS-1900、IMT-2000、PCS、PHS、WCDMA、WLAN、WiMAX 目錄

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 ........................ xi

第一章 緒論

1.1前言.....................1 1.2研究動機...................3 1.3章節概要...................3 第二章 小型雙頻平面天線

2.1天線設計...................4 2.2反射損耗...................6 2.3電流分布..................10 2.4輻射場型..................12 2.5天線結果與分析之探討............15 第三章 雙寬頻印刷單極天線

3.1天線設計..................17 3.2反射損耗..................19 3.3電流分布..................27 3.4輻射場型.................28 3.5天線增益.................31 3.6天線結果與分析之探討............33 3.7小型多頻平面天線..............34

第四章 結論......................36 參考文獻........................37 參考文獻

[1] G. Augustin, P.C. Bybi, V.P. Sarin, P. Mohanan, C.K. Aanandan, K. Vasudevan,“A Compact Dual-Band Planar Antenna for DCS-1900/

PCS/PHS, WCDMA/IMT-2000, and WLAN Applications,”IEEE Antennas Wireless Propag. Lett., Vol. 7, pp108-111,2007.

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[2] W. C. Liu and W. R. Chen, “CPW-fed compact meandered patch an- tenna for dual-band operation,” Electron. Lett., vol. 40, no. 18, pp.1094-1095, Sep. 2004.

[3] Y.-L. Kuo and K.-L. Wong, “Printed double-T monopole antenna for 2.4/5.2 GHz dual-band WLAN operations,” IEEE Trans. Antennas Propag., vol. 51, no. 9, pp. 2187–2192, Sep. 2003.

[4] S. H. Choi, J. K. Park, S. K. Kim, and H. Y. S. Kim, “Design of dual-band antenna for the ISM band using a backed microstrip line,”

Microw. Opt. Technol. Lett., vol. 41, no. 6, pp. 457–460, Jun. 2004.

[5] C.-Y. Huang and P.-Y. Chiu, “Dual-band monopole antenna with shorted parasitic element,” Electron. Lett., vol. 41, no. 21, pp. 1154-1155, Oct. 2005.

[6] R. Li, B. Pan, J. Laskar, and M. M. Tentzeris, “A compact Broadband planar antennas for GPS, DCS-1800, IMT-2000 and wlan applications,”IEEE Antennas Wireless Propag. Lett., vol. 6,pp. 25–27, 2007.

[7] C.-Y. Pan, T.-S. Horng, W.-S. Chen, and C.-H. Huang, “Dual wideband printed monopole antenna for WLAN/WiMax applications,”

IEEE Antennas Wireless Propag. Lett., vol. 6, pp.149-151,2007.

[8] V. Zachou, C. G. Christodoulou, M. T. Chryssomallis, D.Anagnostou, and S. Barbin, “Planar monopole antenna with attached sleeves,”

IEEE Antennas Propag. Lett., vol. 5, pp. 286–289, 2006.

[9] W.-C. Liu, “A coplanar waveguide-fed folded-slot monopole antenna for 5.8 GHz radio frequency identification application,” Microw. Opt.

Technol. Lett., vol. 49, pp. 71–74, 2007.

參考文獻

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