A quad-element multiple input multiple output (MIMO) antenna arrangement for UWB and cellular (C-band) communication is suggested in this paper. Initially, a single component is constructed and reconfigured into a 4 element MIMO architecture. The introduced MIMO antenna is constructed on an FR4 material (ɛ = 4.3 and tanδ = 0.025) and has an overall dimension of 40×40×1.6 mm3 for a working band of 4.08 to 9.77 GHz. It possesses a peak gain of 4.37 dBi and an average isolation of -26 dB, with a maximum value of -39 dB. With an ECC of 0.002 and a diversity gain of 9.998 dB, the designed MIMO array exhibits exceptional diversity performance over the entire operational spectrum. The antenna's maximum radiation efficiency is greater than 83%, and its radiation patterns are consistent across the operational spectrum. The predicted MIMO's fantastic qualities make it a perfect fit for UWB and C-band wireless communications.