Array antennas with low sum and difference pattern side lobes an

Details Array antennas with low sum and difference pattern side lobes an Array antennas with low sum and difference pattern side lobes an

1998-06-16

1999-12-21

Pihulic, Daniel T.

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

Return signal controls radar system

Antenna control

G01S 1344

Patent

active

06005512&

ABSTRACT:
A radar system and method for obtaining low sum and difference side lobe patterns from a phased array antenna comprising radiators distributed amongst four quadrants A, B, C, and D. The quadrants are arranged in a clockwise order of A, B, D, and C. Each quadrant is further divided into an inner portion and an outer portion. The monopulse sum pattern is determined by adding signals received by radiators in the A quadrant, B quadrant, C quadrant, and D quadrant. The elevation difference pattern is determined by subtracting a CD sum consisting of signals received by radiators in the C outer portion and the D outer portion from an AB sum consisting of signals received by radiators in the A outer portion and the B outer portion. The azimuth difference pattern is determined by subtracting a BD sum consisting of signals received by radiators in the B outer portion and the D outer portion from an AC sum consisting of signals received by radiators in the A outer portion and the C outer portion.

REFERENCES:
patent: 3860934 (1975-01-01), Cheo et al.
patent: 3965475 (1976-06-01), Deerkoski et al.
patent: 4754286 (1988-06-01), Brunner et al.
patent: 4792805 (1988-12-01), Miglia
patent: 4882587 (1989-11-01), Vodopia
patent: 5068671 (1991-11-01), Wickes et al.
patent: 5148182 (1992-09-01), Gautier et al.

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