Patent attributes
A dipole based decoy system provides an inexpensive alternative to chaff. A non-conductive filament patterned with lengths of conductive material that form dipole antennas at one or more radar frequencies is stored on the air vehicle and attached to a projectile. In response to a RWR warning, a programmed time or location or a time-to-target, a mechanism releases the projectile(s) to deploy the filament with its dipole antennas at a speed greater than or equal to the speed of the air vehicle to present an extended target or a separate false target to enemy radar. The projectile is either towed behind the air vehicle or launched away from the air vehicle. Either approach is effective to overcome Doppler and moving range gating by presenting coherent signal returns and ranges and velocities consistent with the air vehicle during a threat interval posed by the radar defense systems.
