Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1983-10-19
1985-11-12
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343853, G01S 316, G01S 328
Patent
active
045531463
ABSTRACT:
A directional antenna system having a passive arrangement for reducing the amplitude of signals received in the direction of one of the side lobes of the antenna pattern. The system includes a main directional antenna and two or more auxiliary antennas, each of which has less directivity than the main antenna. The auxiliary antennas are aimed in the direction of a selected side lobe of the main antenna whose effect is to be diminished. The outputs of all the antennas are combined in a network having appropriate amplitude and phasing adjustments to cause the combined outputs of the auxiliary antennas to interfere destructively with the energy received by the main antenna in the direction of the selected side lobe.
REFERENCES:
patent: 3177489 (1965-04-01), Saltzberg
patent: 3982245 (1976-09-01), Soule, Jr. et al.
patent: 4060807 (1977-11-01), Barton
patent: 4313116 (1982-01-01), Powell et al.
Blum Theodore M.
Etlinger Louis
Sanders Associates Inc.
Weinstein Stanton D.
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