Transponder reply limiting by means of recognition of fixed inte

Details Transponder reply limiting by means of recognition of fixed inte Transponder reply limiting by means of recognition of fixed inte

1971-06-10

1980-04-15

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 956

Patent

active

041986326

ABSTRACT:
It is shown that the interrogation repetition period (IRP) of an interrogr can be recognized by a transponder and then used by it to both determine when the interrogator has elicited a predetermined number of replies called an adequate response and limit the interrogator to that number during each scan. This form of reply limiting by a transponder requires absolutely no change in the type of signals transmitted. Logic circuits that perform the required functions are provided.

REFERENCES:
patent: 2777059 (1957-01-01), Stites
patent: 2821705 (1958-01-01), Wachtell
patent: 3054103 (1962-09-01), DeFaymoreau
patent: 3187258 (1965-06-01), Zolnik
patent: 3241137 (1966-03-01), Smoll
patent: 3508260 (1970-04-01), Stein
Skolnik, Radar Handbook, McGraw--Hill, 1970, pp. 38-4 and 38-6.

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