The new work focuses instead on cold, dense masses of gas that have markedly less random motion, and which emit their radiation in the microwave part of the electromagnetic spectrum.
Wi-Fi exploits the spectrum used by such gadgets as cordless telephones and microwave ovens--airwaves that haven't been auctioned or allocated to an exclusive user.
Yet despite high costs of entry and regulatory limits on spectrum availability and infrastructure investment, new technologies (LTE, satellite, microwave, and higher-frequency communications) and new competitors continue to enter the market all the time.
But it uses a lot of battery power, and the 2.4 GHz spectrum is also widely in use by devices like Wi-Fi networks--and cordless phones and microwave ovens can cause interference in that range.