Nice simulation results shared by Katerina G.
Total beam envelope of three 5G antenna arrays in mobile phone near human head.
12 beam positions were simulated in total, switching between 27.5GHz and 28.35GHz, as well as several scanning angles. All of that results in the envelopes shown in the video.
It is worth noting, that human body makes a quite good barrier for propagation of mm-wave signal.
Total simulation time for this model is approximately 18 hours, using Time Domain solver and GPU acceleration.