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A novel compact wideband antenna with T‐shaped strips inside square ring is proposed. By stacking a pair of T‐shaped strip one above another, the antenna covers the WIMAX (3.3‐3.8 and 5.25‐5.85 GHz), WLAN (2.41‐2.54, 5.15‐5.35, and 5.72‐5.85 GHz), and lower band of future 5G communications (3.6‐6 GHz). The antenna is fabricated on mm³ FR‐4 substrate. UWB operation is achieved using a rectangular shaped slot in the ground plane. The designed antenna has been fabricated and measured. Simulation results and measured results are in good agreement.