In this work a compact dual-band microstrip patch antenna for WLAN applications is presented. The two operative frequency ranges are 2.40 ? 2.50 GHz and 5.15 ? 5.35 GHz. The proposed antenna is made of two stacked patches printed on different layers, thus resulting in a planar, light structure, suitable for lowcost mass production. The reduced antenna size allows for the integration in conformal or planar 2-D arrays, the maximum dimension of the resulting elementary cell being smaller than 0.75 ?0 at the higher frequency (5.25 GHz). Measurements and design procedure are provided.