Basic RF it seems. I work with HF everyday. I know I can kill a iPhone or any cell phone if it is on in 36hrs or less, if I set it right on the epicenter of a power source we use through out our shop. All this from 100amps of 220v 3ph converted to 30v/600amp pf power.
If it did not exist, cables would not need shielding (would make my life way easier too). I am forever chasing "RF" or "HF" leaks that find their way into drive boards and dc motors and create havoc. Our shop does not have any "real" power and can still cause trouble.
A guy that used to help me track problems on a few of our CNC machines had a few friends who "rebelled" against the power companies and their new smart meters by building Faraday cages around the meters to block the exiting RF signal to the mother hub. They changed their mind about it when the power companies started to "estimate" the bill, wow. It's not like you can switch your power company when you grow tired of them like your phone service or insurance.
Russia banned microwave ovens due to the size of the wave length not the power output. "microwave" has a wave length smaller than your eye socket and other places of entry to your body, not good. Funny, we can use it to free up bandwith and place cordless phones and cell phones on the same band now, just lower wattage, kinda like the smoker in my backyard, might take six hours instead of 15 minutes, but it'll cook that meat so tender!