This research article develops and evaluates a patch antenna for wireless network applications at 3.5 GHz. Rogers RT5880 materials was used as the substrate. It has a dielectric constant of 2.2, a loss tangent of 0.0009, and a thickness of 0.6 mm. Computer Simulation Technology (CST) software is used to design, simulate, and optimize antennas. The simulations for S11 show that the reflectance is − 43.681 dB, the VSWR is 1.045, the gain is 7.81 dBi, the directivity is 8.75 dBi, the surface current is 66.8 A/m, and the efficiency is 89.25%. The main new thing about this research is that it aims to get a significant reflection coefficient (S11), higher gain, lower VSWR, better directivity, and overall higher operational efficiency. Furthermore, good impedance matching (50.15 Ω) is achieved in the model. If the antenna’s impedance matching is 50 Ω, the fabrication process will also yield excellent results, which will align perfectly with the simulation results. Applications for 5G wireless networks may utilize the developed antenna.