Communications: directive radio wave systems and devices (e.g. – Radar ew – Ecm
Patent
1991-11-07
1992-10-20
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar ew
Ecm
342 15, 342 21, G01S 738, H04K 300
Patent
active
051574012
ABSTRACT:
A shipborne Electric Countermeasures (ECM) system protects ships against an pproaching missile by transmitting electromagnetic jamming signals directly at the missile's radar in order to disturb its range and angle tracking system sufficiently to prevent the missile from intercepting the ship. Various jamming techniques are transmitted until one is found that causes an angle deflection or "jog" in the radar transmitting antenna of the missile. The ECM's receiver looks for a sudden drop in the strength of the radar signal transmitted by the missile's radar, which indicates that a "jog" may have occurred, in order to determine if a jamming technique is effective. Multipath disturbances due to forward scattering interference also cause drops in the strength of a received radar signal but these types of signal fluctuations are a height dependent phenomenon. This ECM system diferentiates between multipath disturbances and actual "jog" by using a receiving antenna array with a number of antennas located at different heights. The vertically separated antenna measures drops in signal strength at different times if these drops are caused by multipath disturbances. However, any drops in signal strength caused by a "jog" reach all the antennas at the same time and are measured simultaneously providing an indication that a "jog" has occurred.
REFERENCES:
patent: 3618096 (1971-11-01), Schoneborn
patent: 3922676 (1975-11-01), O'Berry et al.
patent: 4126862 (1978-11-01), Simonaire
patent: 4538152 (1985-08-01), Wirth
patent: 4649392 (1987-03-01), Apostolos
patent: 4700191 (1987-10-01), Manor
patent: 5045857 (1991-09-01), Hills
Her Majesty Queen Minister of National Defence Canadian Governme
Sotomayor John B.
LandOfFree
Jog detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Jog detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Jog detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-195182