The 5G Moto Mod will allow the Moto Z3 to become one of the first commercially 5G-enabled smartphones in the world.
A FCC filing for the add-on has revealed it has a way to limit radiation exposure from millimeter waves.
It shows that the add-on has several sensors to detect fingers around the module.
Antennas close to those fingers will shut down in order to reduce exposure.
“The control mechanism is a simple one in which, if proximity detectors indicate the potential presence of the user within a roughly conical region in front of the module where power density may approach the MPE [maximum permissable exposure – ed] limit, that module is disabled from use by the modem. This terminates and prevents transmission from the module in question until the condition is cleared,” reads an excerpt of the filing.
This document focuses on the mm-wave portion of the assessment only, while the sub-6 GHz and aggregate exposure are treated in a separate document.
The feature seems to imply that radiation is a concern of some kind in the transition to 5G, even if it’s still within the allowed limits. Or it could simply be a case of Motorola being excessively cautious.