EP 0035439 B1 19841024 - METHOD AND ANTIJAMMING DEVICE FOR A RADAR WITH AN ANTENNA FOR ELECTRONIC SCANNING, AND RADAR COMPRISING SUCH A DEVICE
Title (en)
METHOD AND ANTIJAMMING DEVICE FOR A RADAR WITH AN ANTENNA FOR ELECTRONIC SCANNING, AND RADAR COMPRISING SUCH A DEVICE
Publication
Application
Priority
FR 8004836 A 19800304
Abstract (en)
[origin: EP0035439A1] 1. Antijamming process for deviation measurement meter radar associated to an electronic scanning plane antenna (1) comprising, a network, having a symmetry center (o), elementary sources with their address dephaser-attenuator i, j with respect to two orthogonal directions OX and OY of the antenna plane, consisting in making a calculation intended for the determination of an equiphase plane Z corresponding to the target direction vector (OP) of the antenna, the said antenna emitting signals at wavelength lambda and receiving in a direction (cation) with respect to its axis of symmetry (OZ) the signals emitted by a jamming source (Bi ), characterized in that the procedure occurs according to the following steps : - an antenna scanning allowing the radar deviation measurement receiver (66) to log the directions of the different jamming sources (Bi) ; - calculation of a periodic phase disturbance law (3) in the equiphase plane 2 corresponding to the target direction vector OP of the antenna of spatial period lambda/sin (cation) defined parallelwise to the plane intersection (lambda) of the antenna and of the plane OZ, OBi and of which the equiphase points form in the plane of the antenna (1) lines that are approximately straight and parallel between them to the directions vector OX and vector OY ; - calculation and selection of the number of address dephasers-attenuators i, j and modification of the phase and/or the amplitude by these dephaser-attenuator in order to obtain this disturbance law, determining a gain reduction of the antenna in the direction (cation) of the jammer involved, for the target direction vector OP of the antenna.
IPC 1-7
IPC 8 full level
H01Q 3/26 (2006.01)
CPC (source: EP)
H01Q 3/2617 (2013.01)
Citation (examination)
- US 4189733 A 19800219 - MALM ROBERT [US]
- US 3453623 A 19690701 - BLACKBAND WILLIAM THOMAS, et al
- EP 0014650 A1 19800820 - RADANT ETUDES [FR]
- US 3964065 A 19760615 - ROBERTS EUGENE L, et al
Designated contracting state (EPC)
DE GB IT NL
DOCDB simple family (publication)
EP 0035439 A1 19810909; EP 0035439 B1 19841024; CA 1177565 A 19841106; DE 3166762 D1 19841129; DK 94881 A 19810905; FR 2477784 A1 19810911; FR 2477784 B1 19831223; NO 153072 B 19850930; NO 153072 C 19860108; NO 810731 L 19810907
DOCDB simple family (application)
EP 81400286 A 19810224; CA 372172 A 19810303; DE 3166762 T 19810224; DK 94881 A 19810303; FR 8004836 A 19800304; NO 810731 A 19810303