Distributed jammer system
View Patent ↗According to some embodiments of the invention a laser directed infrared countermeasures system (hereinafter: “LDIRCM system”) is mountable on a platform. According to some embodiments of the invention, a LDIRCM system may include a plurality of sector units. Each sector unit may include at least one laser unit and a laser guidance module. The laser unit may be adapted to generate a laser beam or laser energy that is intended for jamming a guidance system of a threat. The laser unit may be coupled to the laser guidance module. The laser guidance module may be adapted to steer at least a laser beam generated by the laser unit towards a threat.
1. A LDIRCM system mountable on a platform, comprising:
a sector unit, comprising:
a laser unit adapted to generate a laser beam;
a controller for controlling operation of the laser unit; and
a laser guidance module adapted to cause the laser beam to steer towards a threat within a certain sector relative to the sector unit;
a staring array MWS module adapted to provide a pixilated frame representing a specific sector relative to the MWS module for enabling detection and tracking of the threat within the sector relative to the MWS module,
wherein the staring array MWS module comprises a plurality of staring sensors that are each configured to provide a pixilated representation of an IFOV of the staring sensor, such that the IFOV of each pixel in the pixilated frame meets a accuracy criterion that is related to an optical property of the laser beam, and
wherein the staring array MWS module is rigidly attachable to the sector unit, such that data provided by the staring array MWS module to the sector unit is substantially unaffected by physical distortions of the platform and is maintained in compliance with the accuracy criterion.
2. The system according to claim 1 , wherein the accuracy criterion requires that the IFOV of each pixel in the pixilated frame be smaller than a FWHM far field divergence angle of the laser beam that is omitted by the respective sector unit.
3. The system according to claim 2 , wherein the MWS is rigidly attachable to the sector, such that the IFOV each pixel in the pixilated frame is stabilized relative to the sector unit.
4. The system according to claim 1 , wherein the MWS is rigidly attachable to the sector unit, such that an angular error between a location of the threat as represented by tracking data provided by the MWS and a centerline of the laser beam directed by the sector unit towards the threat based on the tracking data is smaller than a far field divergence angle of the laser beam.
5. The system according to claim 1 , further comprising a radar detection unit which is configured to detect a threat in proximity of the platform.
6. The system according to claim 5 , wherein the radar detection unit is used in combination with the MWS module.
7. The system according to claim 6 , wherein the radar detection unit is configured to provide data that can be used for detecting and/or tracking the threat, and wherein the data from the radar detection unit is cross referenced with data from the MWS module.
8. The system according to claim 7 , wherein the data from the radar detection unit is used to identify a false alarm from the MWS module.
9. The system according to claim 1 , wherein the MWS module is adapted to:
implement a first mode of operation for locating a signal that includes a signature of the threat at a first frame rate and within a first frame, and
implement a second mode operation for tracking the threat that was detected during the first mode of operation, the second mode of operation including:
defining a subframe within the first frame around the signature of the threat that was detected during the first mode of operation, and
sampling the subframe at a second frame rate that is substantially higher than the first frame rate.
10. The system according to claim 1 , wherein the laser guidance module includes one or more beam steering elements rotatable about a first and a second axes for steer at least the laser beam generated by the laser unit towards the threat, and wherein the sector unit is mountable on the platform such that a motion of the one or more beam steering elements about the first axis does not cause an orientation of the second axis of the one or more beam steering elements to change with respect to the platform and vice versa.
11. The system according to claim 1 , comprising a plurality of sector units, and for each one of the plurality of sector units, the system comprises a respective staring array MWS module that is rigidly attachable to the sector unit, such that data provided by the staring array MWS module to the sector unit to which it is rigidly attached is substantially unaffected by physical distortions of the platform, and is maintained in compliance with the accuracy criterion.
12. The system according to claim 11 , wherein at least one of the plurality of sector units is operable independently of the operation of any of the other sector units.
13. The system according to claim 11 , wherein each one of the plurality of sector units when mounted on the platform is configurable to provide a jamming capability within a sector that is approximately 90° horizontal to the platform and tens of degrees vertical to the platform.
14. The system according to claim 11 , wherein each one of the plurality of sector units when mounted on the platform is configurable to provide a jamming capability within a sector that is approximately 60° horizontal to the platform and tens of degrees vertical to the platform.
15. An airborne platform, comprising:
a LDIRCM system mounted on the platform, comprising:
a sector unit, comprising:
a laser unit adapted to generate a laser beam;
a controller for controlling operation of the laser unit; and
a laser guidance module adapted to cause the laser beam to steer towards a threat within a certain sector relative to the sector unit;
a staring array MWS module adapted to provide a pixilated frame representing a specific sector relative to the MWS module for enabling detection and tracking of the threat within the sector relative to the MWS module,
wherein the staring array MWS module comprises a plurality of staring sensors that are each configured to provide a pixilated representation of an IFOV of the staring sensor, such that the IFOV of each pixel in the pixilated frame meets a accuracy criterion that is related to an optical property of the laser beam, and
wherein the staring array MWS module is rigidly attached to the sector unit, such that data provided by the staring array MWS module to the sector unit is substantially unaffected by physical distortions of the platform and is maintained in compliance with the accuracy criterion.
16. The airborne platform according to claim 15 , wherein the accuracy criterion requires that the IFOV of each pixel in the pixilated frame be smaller than a FWHM far field divergence angle of the laser beam that is omitted by the respective sector unit.
17. The airborne platform according to claim 15 , where said LDIRCM system comprises a plurality of sector units, and for each one of the plurality of sector units, the LDIRCM system comprises a respective staring array MWS module that is rigidly attached to the sector unit, such that data provided by the staring array MWS module to the sector unit to which it is rigidly attached is substantially unaffected by physical distortions of the platform, and is maintained in compliance with the accuracy criterion.
18. The system according to claim 15 , further comprising a radar detection unit which is configured to detect a threat in proximity of the platform.
19. The system according to claim 18 , wherein the radar detection unit is used in combination with the MWS module.
20. The system according to claim 19 , wherein the radar detection unit is configured to provide data that can be used for detecting and/or tracking the threat, and wherein the data from the radar detection unit is cross referenced with data from the MWS module.
21. The system according to claim 20 , wherein the data from the radar detection unit is used to identify a false alarm from the MWS module.