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J Electromagn Eng Sci > Volume 14(4); 2014 > Article
Journal of Electromagnetic Engineering and Science 2014;14(4):367-375.
DOI: https://doi.org/10.5515/JKIEES.2014.14.4.367   
A Circular-Ring Monopole Antenna with a Half-Circular Ring and Ground Slot for WLAN/WiMAX Triple-Band Operations
Joong Han Yoon1, Dae Soo Im1, Sung Jae Ha2, Young Chul Rhee3
1Department of Electronics Engineering, Silla University
2Department of Information and Communication Engineering, Korea Polytechnics College
3Department of Information and Communication Engineering, Kyungnam University
Abstract
In this paper, a novel triple-band circular-ring monopole antenna with a half-circular ring and ground slot for wireless local area network/Worldwide Interoperability of Microwave Access (WLAN/WiMAX) applications is proposed. The proposed antenna consists of one circular ring, a half-circular ring and a rectangular slot in the ground plane. Based on the concept, a prototype of the proposed triple-band antenna was designed, fabricated and tested. The numerical and experiment results demonstrated that the proposed antenna satisfied the -10 dB impedance bandwidth requirement while simultaneously covering the WLAN and WiMAX bands. Furthermore, this paper presents and discusses the 2D radiation patterns and 2D gains according to the results of the experiment.
Key words: Antenna, WLAN/WiMAX, Triple-Band Operation, Circular Ring Antenna

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