The tests were organised by the Federal Aviation Administration, Department of Defense, Department of Homeland Security and Department of Energy, and assessed by the Massachusetts Institute of Technology Lincoln Laboratory.
Aveillant, Raytheon and Lockheed Martin took part in the trials, which were done for both civil aviation and security purposes.
Numerous test flights were conducted close to the the extensive Indian Mesa Wind Farm in Iraan, West Texas.
UK firm Aveillant’s radar successfully observed a wide range of flights without any degradation from the wind farm.
Gordon Oswald, chief technology officer at Aveillant, said: “We don't know exactly what was flown overhead but we're talking about the most sophisticated government in the world here, and they will be out to test us.
“But we can confirm that several different types of aircraft were detected above and around the wind farm, and that our radar easily distinguished between wind farms and different types of aircraft.”
Aveillant is not taking part in the UK Ministry of Defence trials taking place this summer.