Presently, advancement in 5G wireless communication system demands sub 6 GHz frequency band antennas, for its numerous applications in wireless communication devices. In this communication, a rectangular shape patch antenna with partial defected ground plane is suggested. The antenna structure is designed on Rogers RT Duroid 5880 dielectric substrate having 0.787 mm thickness, dielectric constant 2.2, and loss tangent 0.0009. The design structure has an overall size of \(20\, \times \,20\,{\text{ mm}}^{2}\) . The −10 dB return loss performance of the suggested antenna covers a wide frequency range of 3.14–10 GHz, with 3.01 dB maximum gain. The proposed antenna also has circular radiation characteristics over a frequency range of 5.3–5.8 GHz. The suggested antenna is more suitable for 5G sub 6 GHz frequency bands such as n77 (3.3–4.2 GHz), n78 (3.5–3.7 GHz), n79 (4.4–5.0 GHz), n96 (5.925–7.125 GHz), n102 (5.925–6.425 GHz), and n104 (6.425–7.125 GHz).