Much of Google's application with the FCC is redacted.
Here's a summary of what can be gleaned, according to Popular Mechanics:
It will work in ranges typically utilized for communications devices (the 2.5 GhZ and 5.8 GhZ band), but includes higher millimeter bands.
As Benchoff points out, there's a transmitter in the 70-80 GHz band. That band isn't regulated much by the FCC, and is typically used for high-bandwidth communications, and frequencies just under that range (60 GHz) may indeed be utilized for high-bandwidth wireless routers. But whereas those devices will use power in the watts, Google wants a 96.4 kilowatt transmitter. AM radio stations top out at 50 KWs, which can reach at least 38 states. But whereas that's omnidirectional, Google wants something that also concentrates on very narrow widths.
Considering the company's cozy relationship to government spy agencies and the Bilderberg Group, its infatuation with AI and The Singularity à la its Director of Engineering and Futurist Ray Kurzweil, and the patenting of gadgets such as this creepy child's toy that spies on anyone who comes near it, there's every reason to question what Google is really up to here.