Delay control for a pulse repeat-back jamming system

Details Delay control for a pulse repeat-back jamming system Delay control for a pulse repeat-back jamming system

1958-08-27

1982-05-04

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 738

Patent

active

043284965

ABSTRACT:
1. In a repeat-back jammer of the type used to deceive range tracking radar ystems, wherein tracking is accomplished by a gate at the input of said radar system and a servo system which adjusts the relative time position of the input gate to coincide with echo pulses returning from a distant target, and wherein said jammer includes a repeat-back amplifier which transmits a jamming pulse for each said echo pulse the initial jamming pulse being so delayed with respect to said echo pulse that only a minor portion of said jamming pulse coincides with said input gate, said jamming pulse being of sufficient amplitude that said minor portion obscures the echo pulse, the improvement which comprises; time delay means to increase said initial delay of said jamming pulse with respect to said echo pulse in response to a control signal, wave generating means to supply a control signal for said time delay means and a multiplier means for multiplying said signal by 1-.mu..sub.o .beta..sub.o interconnecting said time delay means and said wave generating means, wherein .mu..sub.o .beta..sub.o is the open loop transfer function of said servo system.

REFERENCES:
patent: 2989744 (1961-06-01), Pettit
patent: 3113268 (1963-12-01), Horak
patent: 3624652 (1971-11-01), Haeff
patent: 3760417 (1973-09-01), Haeff et al.
patent: 3983482 (1976-09-01), Doherty

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