I dunno... 3 Gigs is 10 cm, the range in which long range mobile radar
operates.

In my 55+ years of work on comm and nav gear; land, sea, and air; military and
civilian, I've worked from lab to factory to field on everything from dc to
light. I'd never felt anything except when standing close to the transmitting
antennas, and then only in the microwaves from 3 GHz and up. And then only with
relatively high power in the kilowatts peak.

Bill, K5BY