A coplanar waveguide (CPW) antenna for 5G internet of things (IoT) communication is designed and experimentally verified in this article. The proposed antenna's radiator comprises of a simple microstrip patch with a single slot, along with cylindrical cut, and a 50 Ω microstrip feed line. This design structure with a slot allows it to resonate in upper frequency ranges and enhance the bandwidth. The construction uses the single layered RT5880 substrate, with two coplanar grounded planes positioned on either side. The measured wide impedance bandwidth of the proposed antenna is less than -10 dB of 133.7% (3 GHz to 15.1 GHz). The parametric evaluation of the proposed antenna design is performed utilizing the length and width of the slots Ls, Ws, and radius R for minimal return loss and consistent performance over entire operating frequency band. The proposed antenna produces omnidirectional radiation patterns across the entire working band, with a peak gain of 6.5 dBi. The suggested antenna has been fabricated and measured, where both the simulated and measured results closely match with one another. The physical dimensions of the proposed antenna are 30 × 24 × 0.5 mm3. Due to its low cost, wide impedance bandwidth, and seamless integration, this antenna is well-suited for 5G mobile Internet of Things (IoT) applications