Application of antenna design for wireless local area network 彭智成、吳俊德
E-mail: [email protected]
ABSTRACT
An open slot antenna is proposed for WLAN applications in 2.4 – 2.484 / 5.15 – 5.825 GHz bands and WIMAX applications in 2.5 – 2.69 GHz band to gain more than 4GHz bandwidth [1]. It occupies an area of 30 × 35 mm when printed on a FR4
substrate with a thickness of 0.8 mm. The proposed structure applies the open slot antenna to fit the bands for WLAN applications in 2.4 – 2.484 / 5.15 – 5.825 GHz bands and WIMAX applications in 2.5 - 2.69 / 3.3 – 3.8 GHz [2-6]. The volume of propose antenna is smaller than the original one about 30%.The band of this antenna can be adjusted by changing the geometry parameters and matching. But we can not get the necessary bandwidth preciously by this method. So we will add a bandnotch design
besidechanging the geometry parameters and obtain the band more preciously by this design. The EMC problems are also reduced.
We perform an experiment to verify the result of the simulation. This antenna design achieves the desired requirement by the simulated and measured result.
Keywords : Open slot、Miniaturized、EMC
Table of Contents
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 研究動機．．．．．．．．．．．．．．．．．．．．．．1 1.2 研究目的．．．．．．．．．．．．．．．．．．．．．．3 第二章 基本架構
2.1 天線種類．．．．．．．．．．．．．．．．．．．．．．4 2.2 天線結構．．．．．．．．．．．．．．．．．．．．．．5 第三章 變數探討
3.1 變數提出．．．．．．．．．．．．．．．．．．．．．．9 3.2 變數整理及模擬．．．．．．．．．．．．．．．．．．．9 第四章 無線區域網路天線設計及模擬
4.1 無線區域網路之頻率．．．．．．．．．．．．．．．．．22 4.2 無線區域網路天線之幾何結構．．．．．．．．．．．．．22 4.3 無線區域網路天線之模擬結果．．．．．．．．．．．．．24 4.3.1 反射損耗．．．．．．．．．．．．．．．．．．．．．24 4.3.2 輻射場形．．．．．．．．．．．．．．．．．．．．．29 第五章 無線區域網路天線實作及量測
5.1 天線實作．．．．．．．．．．．．．．．．．．．．．．35 5.2 天線量測．．．．．．．．．．．．．．．．．．．．．．36 第六章 結論．．．．．．．．．．．．．．．．．．．．．．．44 參考文獻．．．．．．．．．．．．．．．．．．．．．．．．．46
REFERENCES
[1] W. S. Chen and K. Y. Ku, “Broadband design of non-symmetric ground λ=4 open slot antenna with small size,” Microw. J., vol. 50,pp.
110–121, 2007.
[2] W. S. Chen and K. Y. Ku, “Band-Rejected Design of the Printed Open SlotAntenna for WLAN/WiMAX Operation,” IEEE Trans.
Antennas Propag.,VOL. 56, NO. 4, APRIL 2008[3] N. Behdad and K. Sarabandi, “A compact dual-/multi-band wireless lan antenna,” in IEEE Antennas Propag. Soc. Int. Symp. Digest, 2005,pp. 527–530.
[4] Y. L. Kao 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, pp. 2187–2192, 2003.
[5] J. S. Row, “Dual-frequency triangular planar inverted-F antenna,” IEEE Trans. Antennas Propag., vol. 53, pp. 874–876, 2005.
[6] S. I. Latif, L. Shafai, and S. K. Sharma, “Bandwidth enhancement and size reduction of microstrip slot antenna,” IEEE Trans. Antennas Propag., vol. 53, pp. 994–1003, 2005.
[7] A. P. Zhao and J. Rahola, “Quarter-wavelength wideband slot antennafor 3–5 GHz mobile applications,” IEEE Antennas Wireless Propag.
Lett., vol. 4, pp. 421–424, 2005.
[8] J. Y. Jan and J. W. Su, “Bandwidth enhancement of a printed wide-slotantenna with a rotated slot,” IEEE Trans. Antennas Propag., vol. 53, pp. 2111–2114, 2005.
[9] Y. F. Liu, K. L. Lau, Q. Xue, and C. H. Chen, “Experimental studies ofprinted wide-slot antenna for wide-band applications,” IEEE Antennas Wireless Propag. Lett., vol. 3, pp. 273–275, 2004.
[10] I. J.Yoon, H. Kim, H. K.Yoon, Y. J.Yoon, and Y. H. Kim, “Ultra-widebandtapered slot antenna with band cutoff characteristic,” Electron.
Lett., vol. 41, pp. 629–630, 2005.
[11] K. H. Kim, Y. J. Cho, S. H. Hwang, and S. O. Park, “Band-notchedUWB planar monopole antenna with two parasitic patches,” Electron.
Lett., vol. 41, pp. 783–785, 2005.
[12] K. H. Kim and S. O. Park, “Analysis of the small band-rejected antennawith the parasitic strip for UWB,” IEEE Trans. Antennas Propag., vol.54, pp. 1688–1692, 2006.
[13]鄧聖明,蔡慶龍,柏小松,”天線設計與應用-使用Ansoft HFSS模擬器,”鼎茂圖書出版有限公司,2009.
