Communications: directive radio wave systems and devices (e.g. – Radar ew – Eccm
Patent
1984-10-24
1990-06-19
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Radar ew
Eccm
342379, G01S 736, H04K 300
Patent
active
049357433
ABSTRACT:
Anti-jamming apparatus and method for a radar system having a main antenna utilizes a single electronic-scan auxiliary antenna having a plurality of radiating elements each coupled to appropriate phase shift means. The auxiliary antenna is successively sighted in directions of each of a plurality of jammers. First and second receiving chains respectively coupled to the main and auxiliary antennas supplies a processor with components of the signals received by the antennas. The computer supplies control signals to control the sighting of the auxiliary antenna so that it radiates in the direction of each jammer maximum radiation values, the components of which are those of the field radiated by the main antenna in the direction of the sighted jammer. The processor also provides an output signal comprising a vectorial combination of the signals received by the main and auxiliary antennas. The auxiliary antenna is thus successively used as an auxiliary adjusting antenna, and then used as an anti-jamming antenna.
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IEEE Transactions on Aerospace and Electronic Systems, vol. AES 16, No. 5, "A Combined Programmed and Adaptive Null Steering Technique", pp. 639-646.
Guilhem Robert
Muller Francois
Sotomayor John B.
Tarcza Thomas H.
Thomson - CSF
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