Also, if they wanted to utilize these same frequencies that we commonly use, such as the 1.6GHz for their own personal gain, we probably wouldn't even notice their activity because of so many signals going back and forth.

If its true that higher technologies can hack, surpass and even alter a computer's current database, then they could possibly be (tapping into or) using our own technology to monitor us including how and what technologies we commonly use.

So, where might this radiation be coming from? There's a number of possible sources to consider
 

Their own cell-phones

Wireless microphones (they are all wired for sound with lavalier microphones )

Walkie-talkies

Nearby radio stations

Nearby airports (and airplanes)

Nearby cell-phone towers

1.6 GHz radio signal is just a military communication signal

US military has a flying data hub that communicates with line of sight transmissions at the 1.6 GHz frequency with ground assets. This allows two units without line of sight to communicate securely with each other.

Range is about 150 miles.

Skinwalker Ranch sits almost directly between Hall Air Force Base and NORAD (Or the Space Force Complex).

If there was a flying hub 40 miles or so east of the ranch. Hill AFB could communicate to the hub and the message be securely relayed to NORAD or Space Force.

It could be range improvement testing, some military exercise, who knows. But the 1.6 GHz range would light up over the ranch anytime this kind of communication was being made.

Mystery solved. Not aliens... Air Force

Have Dragon in new Season walk into Helicopter blade when his boss comes to visit and make it an Alien mystery for six episodes.