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Motorola’s 5G phone will have proximity shutoff sensors to limit exposure to millimeter waves
USA Created: 19 Feb 2019
Last August, Motorola announced what might still wind up being the world’s first true 5G phone — the Verizon-exclusive Moto Z3 with an optional 5G Moto Mod. It’s a snap-on module that the company promised would give you an insanely fast 5Gbps cellular connection, faster than most landlines these days. But Moto Z3 buyers had to take the company’s word for that, because the 5G Mod wouldn’t be available until “early 2019,” when Verizon’s 5G NR network is due to launch in the United States.

Well, the 5G Moto Mod just crossed the FCC today, and it came with a surprise in tow — a document that has more details about how it’ll work than I thought the company would ever publicly reveal.

And one of those details is sure to surprise some people, even if it’s not necessarily something anyone should actually worry about. Namely, the 5G Moto Mod will feature proximity sensors that shut off any of its four millimeter wave 5G antennas if your fingers get too close.

Here’s a portion of Motorola’s description:

As mentioned in the device description, capacitive and proximity sensors are used to disable transmission from a given mm-wave antenna array module when a user may be located in close proximity to the module and in a direction in which the module may transmit. 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 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.

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Source: The Verge, Sean Hollister, 16 Feb 2019

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