Ram air inflated passive radar decoy and chaff package therefor

A passive radar decoy for deployment from an aircraft in flight comprising:

• a substantially hemispherical upper body portion having an inner surface coated with an RF reflective material;
• a weighted nose piece;
• a tapered lower body portion connected to the weighted nose piece;
• a plurality of cords interconnecting the tapered lower body portion to the upper hemispherical body portion to provide a circumferential opening into the decoy that effects ram-air inflation of the decoy;
• and
• a second smaller hemispherical body mounted within the upper body portion at the approximate focus of the upper body;
• said second hemispherical body having its outer surface coated with an RF reflective material;
• said decoy capable of reflectively returning RF energy at a particular GHZ frequency range by reason of the hemispherical upper body portion and retroreflectively returning RF energy at the same frequency by reason of the second hemispherical body to effect a scintilating signal by reason of the phase difference between the returns.

A configuration for a radar countermeasures package for deployment from an aircraft in flight having a radar countermeasures system including an ejection tube having a force driven piston therein to effect expulsion of the contents of the ejection tube into the atmosphere in response to a radar countermeasures requirement comprising in combination:

• a segmented tube mounted coaxially within the ejection tube;
• a passive radar decoy having a weighted nose piece and a ram-air inflatable body, the inner surface of the body coated with an RF reflective material, said inflatable body packaged within the segmented tube;
• and
• a plurality of chaff dipoles positioned within the ejection tube, between it and the segmented tube;
• said segmented tube, passive decoy, and chaff dipoles being expelled from the ejection tube by the force-driven piston.