Range tracking apparatus in a doppler radar

Details Range tracking apparatus in a doppler radar Range tracking apparatus in a doppler radar

1976-05-14

1977-12-13

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 5DP, G01S 906

Patent

active

040632385

ABSTRACT:
A first variable tracking gate is generated which activates a sample and hold circuit connected to receive incoming signals from a doppler radar receiver and apply output signals therefrom to a threshold circuit which in turn supplies a signal to a range counter each time the signal from the sample and hold circuit exceeds a predetermined threshold, whereupon an output from the range counter decreases the range at which the tracking gate is generated. A second tracking gate, generated a short time after the beginning of the first tracking gate, activates a second sample and hold circuit connected to receive signals from the radar receiver and supplies signals through a second threshold circuit to the range counter to increase the range of the first gate when the signal from the second sample and hold exceeds a predetermined threshold and signals from the first sample and hold circuit are below the predetermined threshold.

REFERENCES:
patent: 3056128 (1962-09-01), Ball et al.
patent: 3383681 (1968-05-01), Bryant
patent: 3875549 (1975-04-01), Stenersen et al.

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