While it's known that Google has been testing its Project Loon Wi-Fi balloons in New Zealand, it appears the company is also secretly conducting tests in its own backyard, according to PCWorld.
Google has gotten permission from the US Federal Communications Commission to test its Loon balloons in the northern Nevada desert, according to PCWorld. And, with these tests, the company is also purportedly assessing whether it can tap into licensed radio spectrum to broadcast Wi-Fi.
So far, Loon has used the unlicensed 2.4GHz band for its Wi-Fi testing. But, according to FCC filings obtained by PCWorld, Google is testing two types of radio spectrum, along with a broad class signal that could possibly mean it's looking into using 4G LTE for Project Loon.
Using LTE could mean a faster Wi-Fi experience with less interference. But, it also means Google would have to work harder to get regulatory approval from several countries.
Google has hoped for absolute secrecy in regards to its alleged new testing in Nevada, according to PCWorld. In its filing to the FCC, Google reportedly asked the government agency to keep the tests under wraps.
"The technology is under development and highly sensitive and confidential in nature," Google wrote, according to PCWorld. Publicizing these tests would "jeopardize the value of the technology" and enable others to "utilize Google's information to develop similar products in a similar timeframe."
CNET contacted Google for comment. We'll update the story when we get more information.