Side-lobe blanking arrangement for a radar system

Details Side-lobe blanking arrangement for a radar system Side-lobe blanking arrangement for a radar system

1977-09-29

1979-03-06

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343100LE, G01S 922, G01S 766

Patent

active

041433726

ABSTRACT:
The invention relates to an arrangement for suppressing the echos received in the side lobes of a main antenna of a radar system. An auxiliary antenna, whose diagram overlaps with the side lobes of the main antenna, supplies a signal B which is compared with the signal A from the main antenna. The comparison is performed between microwave signals or intermediate frequency signals by means of an operating circuit which emits signals S.sub.1 = A + k.sub.1 B and S.sub.2 = k.sub.2 (A - k.sub.1 B) where k.sub.1 and k.sub.2 are amplitude and phase modifying complex coefficients, and an amplitude and phase demodulating circuit which receives S.sub.1 and S.sub.2, one of which may possibly be in phase quadrature. The presence of an off-center echo, for example, results in a threshold being exceeded by the filtered demodulated signal.

REFERENCES:
patent: 3167761 (1965-01-01), Parquier
patent: 3343166 (1967-09-01), Poinsard
patent: 3747100 (1973-07-01), Gulick, Jr.

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