MODIFIED THREE-CIRCULAR-RING MONOPOLE ANTENNA FOR WLAN/WIMAX TRIPLE-BAND OPERATIONS

摘要

In this article, a novel triple-band-modified three-circular-ring monopole antenna with a rectangular slot in the ground plane for wireless local area network (WLAN)/worldwide interoperability of microwave access (WiMAX) applications is proposed. The proposed antenna consists of two circular rings and one open-ended circular ring. Based on the concept, a prototype of the proposed triple-band antenna was designed, fabricated, and tested. The numerical and experimental results demonstrated that the proposed antenna satisfied the -10-dB return loss for impedance bandwidth requirement while simultaneously covering the WLAN and WiMAX bands. Furthermore, this article presents and discusses the two-dimensional radiation patterns and gains according to the results of the experiment.