This paper intends to propose a new and simple printed dual-band planar monopole antenna for Wireless Local Area Network (WLAN) applications in IEEE 802.11 a/b/g. The proposed antenna effectively covers both 2.4/5GHz bands. The antenna comprises of a central arm and two side arm monopoles of different sizes, which generate two separate resonant modes for the desired dual-band operations. The smaller side arms resonate at the 5 GHz band while the central larger arm resonates at the 2.4 ? 2.5 GHz band. This antenna can easily be fed by using a 50 ohm probe feed with SMA connector. Prototypes of the proposed antenna designed for WLAN operations in the 2.4 and 5.2 GHz bands have been constructed and successfully tested. The measured VSWR and radiation patterns indicate the suitability of this antenna for WLAN applications.