G - Physics – 01 – S
Patent
G - Physics
01
S
343/19
G01S 13/78 (2006.01) G01S 13/76 (2006.01)
Patent
CA 1225451
ABSTRACT The conventional way of achieving an identification, friend or foe (IFF) function for a moveable subject requires the subject to carry a transponder that emits a coded return when a radar pulse is received by its receiver. In the present invention, an IFF system is disclosed which departs from the conventional transponder method and employs no radio-frequency power source. Instead, it uses the scattering or reflecting properties of an antenna to modulate, in a distinctive manner, the radar return from a moveable subject.
448362
Aspila Kalevi P.
Her Majesty The Queen In Right Of Canada As Represented By The M
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