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US 4,233,605 AGranted
Helicopter radar decoy
AssigneeNorthrop Corporation
InventorJohn R. Coleman
Life of this patent
Estimating the term…
Abstract
A Doppler radar signature simulator decoy for protecting a helicopter under attack by hostile weapons which home in on a Doppler radar return signal from the helicopters rotors. The decoy returns a strong radar signal which duplicates a relatively weaker signal emitted from the helicopter rotors, leading hostile weapons to the decoy.
Claims6
A Doppler radar decoy comprising:
- (a) a body portion including a disk and keel member depending therefrom;
- (b) rotor shaft means mounted on said body portions;
- and
- (c) rotor means including an internal retro-directive spar mounted to rotate on said shaft means.
1 more element
A Doppler radar decoy comprising
- (a) a body portion having a hollow cylindrical shape;
- (b) rotor shaft means mounted on said body portion;
- and
- (c) rotor means including an internal retro-directive spar to rotate on said shaft means.
1 more element
Dependencies are inferred from the claim text.