A planar monopole antenna for dual-band Wi-Fi application is disclosed. The antenna has a ground copper and a radiation copper. The radiation copper is adhered to a substrate and has a conductive layer attached to a first surface of the substrate wherein the conductive layer further comprises a first radiation control section operating at a first bandwidth and connected in series via a central post with a second radiation control section operating at a second bandwidth different than the first bandwidth, and a ground section having a rectangularly-shaped pattern with a U-shaped opening at one end thereof positioned around a portion of the second radiation control section, wherein the planar antenna has a current distribution that is higher along the central post and a squared end of the rectangularly shaped ground section. Reception of the radiation copper into the opening of the ground copper forms an U-shaped separation that is approximately 0.6 mm wide. The antenna has a gross span of approximately 45 mm and a width of approximately 7 mm.