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Jammer reference target measurement system

  • US 5,359,329 A
  • Filed: 03/18/1981
  • Issued: 10/25/1994
  • Est. Priority Date: 03/18/1981
  • Status: Expired due to Fees
First Claim
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1. A system for cancelling signals from a jammer entering the mainlobe of the antenna of a monopulse radar and for providing target locations with respect to the location of the jammer comprising:

  • means for notching the antenna response at the jammer location with the antenna pointing so that the jammer is positioned within the 3 dB points of the mainlobe of the antenna;

    means for shifting the effective orientation of said antenna by a small amount and notching the antenna response at the jammer location at the new effective orientation, said new orientation being such that the jammer is still located approximately within the 3 dB points of the new mainlobe orientation; and

    means for determining the ratio between echo signals from the same targets in these two notched antenna responses, said ratio being proportional to the angle separating the target in the response from the jammer.

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