Range or time-delay determining subsystem for use in certain rad

Details Range or time-delay determining subsystem for use in certain rad Range or time-delay determining subsystem for use in certain rad

1977-09-19

1978-11-14

Buczinski, S. C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

340 1C, 343 73, 356 5, G01S 906, G01S 902

Patent

active

041258355

ABSTRACT:
Complicated range gate radar systems are known for determining distance to a target, the target sometimes being centered in the range gate which may have a predetermined width equivalent to a predetermined distance. For example, the range gate may extend from 10,000 to 11,000 yards. The present invention provides a new and simple system for determining range to a target. A series of pulses of energy capable of being reflected from a target is transmitted. Consecutive pulses in the series are spaced apart in time by a predetermined interval and echo-pulses from the target are listened for for a time after each of a plurality of the transmitted pulses. The listening time for consecutive transmitted pulses is varied in a substantially linear manner from substantially zero to a maximum time less than the predetermined interval between transmitted pulses. The transmitted pulses are counted from the beginning of the measurement interval. When an echo is received, counting is stopped and the number of pulses counted is proportional to the distance to the target.

REFERENCES:
patent: 3305862 (1967-02-01), Samuel et al.
patent: 3309703 (1967-03-01), Ammon et al.
patent: 3503680 (1970-03-01), Schenkerman
patent: 3516051 (1970-06-01), Arberman et al.
patent: 3630616 (1971-12-01), Everest
patent: 3723002 (1973-03-01), Everest et al.
patent: 3947119 (1976-03-01), Bamberg et al.

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