Determination of jammer directions using multiple antenna beam p

Details Determination of jammer directions using multiple antenna beam p Determination of jammer directions using multiple antenna beam p

1998-07-20

2000-07-04

Gregory, Bernarr E.

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

Radar ew

Eccm

342 13, 342 16, 342147, 342175, 342195, 34235701, 342378, 342379, G01S 736, G01S 502, H04B 7185

Patent

active

060845406

ABSTRACT:
A radar or GPS receiving system uses an antenna array to produce multiple antenna beams directed toward multiple targets or spacecraft. Stand-off jammers produce signals which tend to be received on the sidelobes of the antenna beams and to disrupt system operation. An array of autonomous or adaptive nullers process the received signals to produce weights which adjust the antenna nulls to direct them toward the jammers. The antenna nulls of one beam pattern are compared with the nulls of other beam patterns. Normal between-sidelobe nulls will not occur at the same angle on all of the patterns, but those nulls generated by the nullers will occur at the same angle. The directions to the jammers are deemed to be those directions in which all beam patterns have nulls.

REFERENCES:
patent: 5101209 (1992-03-01), Martin
patent: 5940033 (1999-08-01), Locher et al.

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