A CPW antenna with overall dimensions of 30 mm × 25 mm × 2 mm is designed using FR4 as the substrate material. Two rectangular ground planes, each having dimensions of 12 mm × 9.5 mm, are printed on the top surface of the substrate. A signal strip of width 5 mm is used to excite the antenna, and the gap between the signal strip and the ground planes is maintained at 0.5 mm. The proposed antenna structure consists of an elliptical patch connected to the central signal strip along with two rectangular CPW ground planes on the top side of the FR4 substrate. The elliptical patch, which is united with the signal strip, resonates at 6.25 GHz. The designed antenna operates over several wireless communication bands, including 5.15–5.35 GHz (5.2 GHz WLAN), 5.725–5.825 GHz (5.8 GHz WLAN), 5.25–5.85 GHz (5.5 GHz WiMAX), 5.725–5.875 GHz (ISM band), and 5.15–5.85 GHz (5.5 GHz Wi-Fi). The impedance (Z) and VSWR characteristics demonstrate good radiation performance at the resonant frequency of 6.25 GHz. Furthermore, the gain plot of the CPW radiator indicates efficient radiation across various wireless bands. The co-polarization level is significantly higher than the cross-polarization level at 6.25 GHz, confirming that the proposed antenna is suitable for multiple wireless communication applications.