obvious application is obvious
It's a radar to be integrated into cell phones, so that your phone can warn you of incoming lamp posts!
Google has asked the United States Federal Communications Commission (FCC) for permission to conduct radio tests in the 76-77 GHz bands, probably as part of its ongoing autonomous vehicles research. Mountain View's application to the FCC has been published here, and was turned up by sharp-eyed Google-watcher Steven Crowley. …