Multiple beam antenna feed arrangement for generating an arbitra

Details Multiple beam antenna feed arrangement for generating an arbitra Multiple beam antenna feed arrangement for generating an arbitra

1981-06-25

1983-10-04

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343368, G01S 1300, H04B 1500

Patent

active

044082053

ABSTRACT:
A directive antenna feed arrangement providing for multiple selectable beam locations and with the ability to provide multiple and independently locatable nulls in specific angular directions in the sidelobe structure of the radiation pattern. An antenna having a plurality of independent antenna elements linearly deployed is coupled to a beam-forming network such as a Rotman lens feed. Main beam directivity is controlled by selection of the Rotman lens ports corresponding to the desired beam direction. Other angles corresponding to the directions of unwanted signals, especially those received on the major sidelobes, are effectively nulled by a phasing network discretely connected to the Rotman lens port at the appropriate angle, the phase control receive signals being mixed with the main beam signal energy. Angle tracking and beam-steering circuits are depicted and described for control of the main beam angle and positioning of the nulls generated.

REFERENCES:
patent: 3670335 (1972-06-01), Hirsch
patent: 3964065 (1976-06-01), Roberts et al.
patent: 4088970 (1978-05-01), Fassett et al.
patent: 4316190 (1982-02-01), Cole
patent: 4338605 (1982-07-01), Mims

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