Sound Crazy
This may sound crazy, but is anyone else worried we will run out of wireless frequencies someday?
I mean with all the cell phones, Wi Fi routers, remote car door unlockers, garage door openers and radio stations, it seems there must be limit to how many frequencies can exist.
Perhaps when we use up the last one, something weird might happen to our brain waves or something.
RF spectrum allocation has been in issue of interest and intense competition for decades. Governmental bodies like the FCC and the ITU have been managing the spectrum. Much UHF TV spectrum has already been diverted to other uses. The move to digital transmission will make better use of what is allocated, and perhaps will free up more. Alternative technologies have already reduced out need for spectrum for the fixed services. Spread spectrum and frequency hopping technologies have greatly increased the utilization of spectrum.
Everything you mentioned except radio stations is very localized. That means the same spectrum can be reused wherever geographic isolation eliminates interference. Most happen in the gigahertz range where propagation distances are quite small. Most digital modes already use time division multiplexing. We still have a lot of room to get smarter before we run out of spectrum.
Of all these, the only one demonstrated to be detrimental to health is extensive use of cell phones right next to the head (RF heating), and especially driving while cellular. The latter kills and injures far more people than the RF heating.
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