  This paper addresses a drawback of massive multiple-input multiple-output
Maximum Ratio Transmission beamforming. In some propagation conditions, when
the base station serves the same target user equipment for a long period, it
reduces the transmit power (and degrades the received power) to avoid creating
high exposure regions located in the vicinity of the antenna and concentrated
in few directions (corresponding to the best propagation paths between the
antenna and the receiver). In this paper, we propose a novel electromagnetic
field aware beamforming scheme, which (i) spreads the beamforming radiation
pattern in the angular domain by adding artificial propagation paths thanks to
reconfigurable intelligent surfaces, (ii) truncates the pattern in strong
directions, and (iii) boosts it in weak directions. Compared to existing
solutions, it maximizes the received power. However, it also consumes more
power. Finally, truncation alone is the best trade-off between received power
and energy efficiency, under exposure constrain.
