Ram air inflated passive radar decoy and chaff package therefor

摘要

A passive radar decoy for deployment from an aircraft in flight comprises a substantially hemispherical body having its inner surface coated with an RF reflective material and its forward end connected to a weighted nose piece. The decoy is ram-air inflatable and is packaged with a plurality of chaff in the aircraft within a radar countermeasures ejection tube. Upon ejection from the aircraft, the decoy achieves RF coverage at millimeter wave frequencies and improves chaff dispersion and an increased period of doppler frequency return to a ground-based radar. The decoy may also include a second hemispherical body mounted at the approximate focus within the inflatable body and having its outer surface RF reflective so as to retroreflectively return RF energy impinging on the decoy and the combined returns from the decoy provide a scintillating signal return to the ground-based radar.