Triple-band monopole planar antenna designed for WLAN/WiMAX application

This paper designs a small and triple-band printed monopole antenna for wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX). The proposed antenna by working in different frequency bands of monopole antenna adds together and consists of two L-shaped patch and a semicircle patch on the front side of the substrate and an irregular rectangular patch on the back side of substrate, which is fed by a 50Ω microstrip line. The structure is simple and each frequency band can be individually controlled by each corresponding branch. Simulation indicates that all performance parameters of the antenna are achieved. The structure of antenna with smaller size is 40 mm×40 mm×1.5 mm. Finally, the proposed antenna is fabricated and measured. The measured results are in good agreement with simulated ones.