Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Iff or sif
Patent
1986-05-30
1994-08-30
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Iff or sif
G01S 1378
Patent
active
053432053
ABSTRACT:
An enemy radar or transmitter transmits a signal at frequency f1. A tag on a friendly forces target receives frequency f1 and, in response thereto, transmits a signal at frequency f2.noteq.f1 modulated by a code unique to the tag. A friendly forces receiver, in response to receiving frequency f2 provides an indication that (a) the tag has received frequency f1, meaning the enemy is operating in the area, and (b) which specific tag has received a signal at frequency f1. The friendly forces can then take appropriate action.
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Checkovich Paul
General Electric Company
Hellner Mark
Young Stephen A.
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