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In this work, we present a highly compact multi-branch structure multi-band antenna with a grounded coplanar waveguide (GCPW)-fed structure printed on 26 ×13 ×1.6 mm3 sized FR-4 substrate having dielectric constant r of 4.3 and loss tangent of 0.02. In the proposed antenna, ve branches are extended from the main radiator to provide multi-band behavior. Two branches are introduced at the upper end of the main radiator, eectively covering the lower bands, while the other three branches are introduced near the center of the main radiator to extend operation to higher bands. e designed antenna covers ve dierent bands: 2.4 GHz, 4.5 GHz, 5.5 GHz, 6.5 GHz, and 7.8 GHz, with respective gain values of 1.34, 1.60, 1.83, 1.80, and 3.50 dBi and respective radiation eciency values of 90, 88, 84, 75, and 89%. e antenna shows a good impedance bandwidth, ranging from 170MHz to 3070 MHz. e proposed antenna is simulated in CST Microwave Studio, while its performance is experimentally validated by the fabrication and testing process. e antenna has potential applications for IoT, sub-6 GHz 5G and WLAN (both enablers for IoT), C-band, and X-band services.