In this article, the design and experimental characterization of a transparent MIMO fractal antenna compatible with 5G communications are presented. An Indium Tin Oxide (ITO) film with a thickness of 150 nm deposited over a glass substrate was used to fabricate the proposed antenna. This antenna is conformed by a pair of CPW-fed octagonal patch. Both patches were modified using a fractal structure, based on a Minkowsky geometry. The antenna was designed to operate in the frequency range from 3 to 5 GHz, which covers the C-band 5G-NR standard frequency assigment. As a result of the experimental characterization, and parameters are below 10 dB, meanwhile the transmission coefficients and are under 20 dB in the desired band. The Envelope Correlation Coefficient (ECC) is between 0.02 and 0.45, and a Diversity Gain (DG) over 9.05 in the frequency range from 3 to 6 GHz. These experimental results agree with the MIMO system in the required band.