Automatic frequency control circuit for frequency agile radar

Details Automatic frequency control circuit for frequency agile radar Automatic frequency control circuit for frequency agile radar

1975-10-17

1977-05-10

Farley, Richard A.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325418, G01S 728

Patent

active

040231690

ABSTRACT:
An automatic frequency control circuit for frequency agile radar systems. Fundamentally, the invention utilizes two oscillators of different frequencies and which are controlled by the IF pulse envelope. The outputs of the oscillators are monitored until such time that corresponding transition points of the outputs coincide. A counter, receiving the output of one of the oscillators, is then decoded at the time of coincidence and the resulting value, being a function of deviation of the IF pulse from a desired frequency, is applied to the radar system as an error correction signal.

REFERENCES:
patent: 3707718 (1972-12-01), Ames
patent: 3725935 (1973-04-01), Alpers

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