Each N4 system utilizes two center-fed, half-loops and a cable harness, enabling “closed loop” current flow. This provides better signal-to-noise ratios and higher rejection of cross-polarized signals. In terms of system performance, this means that smaller signals can be received and bearing errors, particularly those induced by banking, are greatly reduced.
The loop halves are horizontally mounted on opposite sides of the aircraft, normally on the vertical stabilizer.
These rugged antennas have been selected and service proven on such aircraft as the Lockheed Jet-star, P-3A, and C-141 Starlifter, Bell UH1B helicopter, Sikorsky H34 helicopter, Convair 340, Aero Commander, North American Sabreliner, Douglas DC-3, Beech King Air and many other corporate and commercial aircraft.
