Geographic gain time control

Details Geographic gain time control Geographic gain time control

1977-03-02

1978-07-04

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343100LE, G01S 956

Patent

active

040991806

ABSTRACT:
Apparatus is provided for modifying a conventional target locating system in which targets respond to an interrogation signal by transmitting a reply, and the target location is deduced from the azimuth from which a reply is received and the delay between the interrogation signal and the reply. The improvement includes a controllable attenuator coupling the receiving antenna to the target locating system which is controlled to selectively discriminate against selected range cells at selected azimuths. In a preferred embodiment, digital circuitry is relied upon to control the attenuator, and the identication of the range cells to be discriminated against is stored in a digital memory.

REFERENCES:
patent: 3349402 (1967-10-01), Foster
patent: 3680095 (1972-07-01), Evans
patent: 3836964 (1974-09-01), Evans
patent: 3860924 (1975-01-01), Evans
patent: 4021805 (1977-05-01), Effinger et al.
patent: 4050070 (1977-09-01), Beno et al.

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