Target detection device

Details Target detection device Target detection device

1978-12-22

1980-11-25

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

102214, G01S 1342, F42C 1304

Patent

active

042361575

ABSTRACT:
A target detection device which functions a warhead at a predetermined het above the surface of the earth. A frequency modulated, pseudo-noise coded signal reflects from the surface of the earth to provide Doppler signals to a dual gate Doppler amplifier system. The voltage outputs of the two gates are compared; and a signal is sent to a threshold circuit to ascertain when a predetermined relationship exists between the two voltage outputs to decide when the target detection device is at a predetermined height, at which time a trigger signal actuates a time delay circuit using the Doppler frequency to generate a time delay that is dependent upon the vertical velocity of the target detection device. After the time delay, a signal is sent to a firing circuit which produces a firing pulse to function the warhead.

REFERENCES:
patent: 3858207 (1974-12-01), Macomber et al.
patent: 3868686 (1975-02-01), Magorian
patent: 4135452 (1979-01-01), Kinsey et al.
patent: 4159476 (1979-01-01), Kohler
patent: 4185560 (1980-01-01), Levine

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