Improved radar receiver system

Details Improved radar receiver system Improved radar receiver system

1973-11-02

1994-04-26

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Radar ew

Eccm

G01S 736

Patent

active

053070690

ABSTRACT:
An improved radar receiver having side lobe blanking and coherent side lobe cancellation circuits in the main receiver channel and a control arrangement that overcomes the conventional problem that the side lobe blanking circuit will also blank a noise jammer signal even after the coherent side lobe canceller circuits have acquired the jamming energy. In this system, the side lobe blanking circuits are mechanized with a logarithmic amplifier and with a fast time constant circuit in an auxiliary receiver channel. The fast time constant is selected to match or be slightly longer than the acquisition time constant of the coherent side lobe cancellers. This implementation allows the side lobe blanking circuits to be energized at all times, thus simplifying the operational control of the system. In some arrangements in accordance with the invention the fast time constant may be varied as a function of the amplitude of the jamming signal in the main channel.

REFERENCES:
patent: 3094695 (1963-06-01), Jahn
patent: 3164832 (1965-01-01), Varela
patent: 3167761 (1965-01-01), Le Parquier
patent: 3349402 (1967-10-01), Foster
patent: 3706389 (1972-12-01), Taylor, Jr.
patent: 3781883 (1973-12-01), Effinger

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