Antenna Associates' Model FAI-22S's function is to provide identification and position detection data for civil Air Traffic Control or Military Identification Friend or Foe (IFF) Applications.

It is an 7 foot open planar array antenna that can be utilized in a stand-alone configuration or in combination with a primary surveillance radar.

At the heart of the FAI 22S is its eleven radiation columns. Each column is comprised of high strength composites vacuum sealed to a printed circuit board. This process hermetically seals the column from the elements while adding significant rigidity, durability, and weather resistance.