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International Journal of Antennas and Propagation
Volume 2013, Article ID 109450, 9 pages
Research Article

A Rectangular Ring, Open-Ended Monopole Antenna with Two Symmetric Strips for WLAN and WiMAX Applications

1Department of Electronic Engineering, Silla University, San 1-1 Gwaebeop-Dong, Sasang-Gu, Busan 617-736, Republic of Korea
2Department of Information and Communication Engineering, Kyungnam University, 449 Wolyong-Dong, Masan, Kyungnam 631-701, Republic of Korea
3School of Electrical and Computer Engineering, Georgia Institute of Technology, North Avenue, Atlanta, GA 30332, USA

Received 13 November 2012; Accepted 21 January 2013

Academic Editor: Stefano Selleri

Copyright © 2013 Joong-Han Yoon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A triple-band rectangular ring, open-ended monopole antenna with symmetric L strips for wireless local area network (WLAN)/Worldwide Interoperability of Microwave Access (WiMAX) applications is proposed. The proposed antenna consists of two symmetric folded arms and L strips. Based on the concept, a prototype of the proposed triple antenna has been designed, fabricated, and tested. The numerical and experimental results demonstrated that the proposed antenna satisfied the −10 dB impedance bandwidth requirement while simultaneously covering the WLAN and WiMAX bands. Furthermore, this paper presented and discussed the 2D radiation patterns and 3D gains according to the results of the experiment. The proposed antenna’s peak gain varied between 2.17 and 4.93 dBi, and its average gain varied between −2.97 and −0.53 dBi.