Adaptive system for suppressing interferences from directional j

Details Adaptive system for suppressing interferences from directional j Adaptive system for suppressing interferences from directional j

1982-08-02

1986-02-25

Tarcza, Thomas H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343384, 343781P, 343914, G01S 736

Patent

active

045730512

ABSTRACT:
A radar antenna with a collector of microwave energy incident along the main lobe of its radiation pattern, feeding a processor whose principal channel generates a raw output signal, is provided within the effective area of that collector with one or more ancillary radiation receivers intercepting energy from side lobes encumbered by interfering signals from directional jammers. The output signals of auxiliary channels connected to the ancillary radiation receivers are subtracted in the processor, at an intermediate-frequency level, from the raw output signal of the principal channel to produce a useful signal which is fed back to an adaptive cancellation loop in each of these auxiliary channels. The collector may be an electronically scanning phased array of elemental radiators, in which case the ancillary receivers are formed by respective subgroups of some of these radiators; alternatively, the collector could be a mechanically scanning reflector provided with apertures accommodating the ancillary radiation receivers.

REFERENCES:
patent: 3435453 (1969-03-01), Howard
patent: 3938153 (1976-02-01), Lewis et al.
patent: 3938154 (1976-02-01), Lewis
patent: 4044359 (1977-08-01), Applebaum et al.
patent: 4204211 (1980-05-01), Cavelos
patent: 4367472 (1983-01-01), Hauptmann et al.
patent: 4370655 (1983-01-01), Masak
patent: 4434424 (1984-02-01), Old

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