In this study, the implication of this change is investigated in terms of the maximum possible radiated power (Pmax) from a device used in close proximity to the human body. The results show that the existing exposure limits will lead to a non-physical discontinuity of several dB in Pmax as the transition is made from SAR to power density based basic restrictions. As a consequence, to be compliant with applicable exposure limits at frequencies above 6 GHz, Pmax might have to be several dB below the power levels used for current cellular technologies. Since the available power in uplink has a direct impact on the system capacity and coverage, such an inconsistency, if not resolved, might have a large effect on the development of the next generation cellular networks (5G).
Davide Colombi, Björn Thors, Christer Törnevik.
Published 2015-02-04 in IEEE Antennas and Wireless Propagation Letters, volume 14.
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