適用於2.4GHz無線區域網路系統可重置圓極化陣列天線之研究

Study of reconfigurable circular polarized array antenna for 2.4GHz WiFi system

顏崇育(Chung-Yu Yen)

指導教授 ： 王曙民

義守大學/電機資訊學院/電機工程學系/碩士(2014年)

https://doi.org/10.6343/ISU.2014.00009

摘要

本論文提出三支適用於無線區域網路(WiFi)2.4GHz頻段之可重置圓極化陣列天線設計。論文中所研究的天線皆為單饋入架構設計。第一支天線設計是利用圓弧槽控制輻射體的表面電流流向，使天線擁有雙圓極化特性。第二支天線是利用環形微帶線控制輻射體的表面電流流向，以達成雙圓極化特性。第三支天線是採用(第二支天線架構)以及180°相位差的饋入網路所構成陣列天線，如同上述第二支天線，此陣列天線保有雙圓極化之特性。
本論文所設計的天線特點為具有雙圓極化特性、雙方向圓極化輻射場型以及單饋入架構，其優點除了可以提高天線接收能力，亦可以減少系統的天線數量需求以及縮小天線整體大小。詳細的天線設計與特性分析以及量測將會在各章節探討。

關鍵字

圓極化天線 ； 陣列天線 ； 槽孔天線 ； 無線區域網路 ； 環形微帶線

並列摘要

The thesis presents three different reconfigurable and circular polarized antennas which are operated at 2.4GHz and targeted for wireless local area network system. All the proposed antennas have single feed structure. The first antenna uses circular arc to control the surface current direction on the antenna so that dual circular polarization can be achieved. The second antenna applies annular line to control the surface current direction on the antenna and, hence, the dual circular polarization is obtained. The third one is a two-element array antenna which consists of two annular line antennas (the second one mentioned above) feeding with 180 degrees out of phase. Again, the array antenna maintains the dual directional circular polarized property of the second antenna.
The characteristics of the three antennas are controllable dual circular polarization with simple single feed structure. These antennas are compact and can improve the receiving quality as well as reduce the circuit size. The detail of the antenna design, simulation, and measurement are presented and discussed thoroughly in the thesis.

並列關鍵字

Circular polarization antenna ； Array antenna ； Slot antenna ； WLAN ； Wi-Fi ； Annular line

參考文獻

Antennas for GSM, WLAN, and WiMax Applications,” IEEE Transactions on Consumer Electronics, vol. 56, no. 3, pp. 1235-1240, August 2010.

[1]. Jen-Yea Jan and Liang-Chih Tseng, “Small planar monopole antenna with a shorted parasitic inverted-L wire for wireless communications in the 2.4-, 5.2-, and 5.8-GHz bands,” IEEE Trans. Antennas Propagat., vol. 52, no. 7, pp. 1903-1905, July 2004.

[2]. Gary C.-Y. Chen, K. K.-M. Chan, and K. Rambabu, “Miniaturized Yagi Class of Antennas for GSM, WLAN, and WiMax Applications,” IEEE Transactions on Consumer Electronics, vol. 56, no. 3, pp. 1235-1240, August 2010.

[3]. Joong Han Yoon, In Gi Jeong, Sung Jae Ha and Young Chul Rhee, “Design of a Microstrip-fed Monopole Antenna with a Rectangular Slit Ground and a Rectangular Projection Strips for Dual-Band WLAN Operations,” Asia-Pacific Microwave Conference, pp.1039-1044, June 2011.

[4]. Kuo-Liang Wu, Guan-Yu Chen, Jwo-Shiun Sun and Chen, Y.D, “Wire antenna for dual band WLAN application,” Advanced Technologies for Communications (ATC),2011 International Conference on, pp. 283-286, Aug, 2011.