ANTI-JAMMING CIRCUIT FOR ANGLE TRACKING RADARS

• US 3,838,423 A
• Filed: 10/15/1958
• Issued: 09/24/1974
• Est. Priority Date: 10/15/1958
• Status: Expired due to Term

• Current Assignee: Paul L. Di Matteo
• Original Assignee: Paul L. Di Matteo
• Inventors: Di Matteo, Paul L.
• Primary Examiner(s): Hubler, Malcolm F.
• Application Number:
  US03/767,479
• Time in Patent Office: 5,823 Days
• Field of Search: 343/5,7,7.3,7.4,16.1,18,16M
• US Class Current: 342/80
• CPC Class Codes: G01S 13/4445 amplitude comparisons monopulse, i.e. comparing the echo signals received by an antenna arrangement with overlapping squinted beams
• CPC Class Codes: G01S 13/66 Radar-tracking systems; Analogous systems

Abstract

1. In a pulsed radar signal tracking receiver, first, second and third means for tracking received signals in the respective polar coordinates of range, elevation and azimuth, said second and third means for tracking being adapted to be actuated solely during the occurrence of a control signal, said first means for tracking in range producing a first output pulse positionable in range and a second output pulse upon the coincidence of said first output pulse and received signal, means resettable at the radar pulse repetition rate for deriving an auxiliary pulse in response to the first signal received during each radar pulse repetition interval, switching means for selectively applying when actuated said first output pulse as said control signal to said second and third means and for selectively applying when deactuated said auxiliary pulse as said control signal to said second and third means, and means for applying said second output pulse to said switching means for actuating said switching means.

Claims

1. In a radar signal tracking receiver, first and second means for tracking received signals in the respective polar coordinates of range and angle, said second means for tracking in angle being adapted to be actuated solely during the occurrence of a control signal, said first means for tracking in range producing a first output pulse positionable in range and a second output pulse upon the coincidence of said first output pulse and received signal, means for deriving an auxiliary pulse in response to received signal, switching means for selectively applying when actuated said first output pulse as said control signal to said second means and for selectively applying when deactuated said auxiliary pulse as said control signal to said second means, and means for applying said second output pulse to said switching means for actuating said switching means.

2. In a pulsed radar signal tracking receiver, first and second means for tracking received signals in the respective polar coordinates of range and angle, said second means for tracking in angle being adapted to be actuated solely during the occurrence of a control signal, said first means for tracking in range producing a first output pulse positionable in range and a second output pulse upon the coincidence of said first output pulse and received signal, means resettable at the radar pulse repetition rate for deriving an auxiliary pulse in response to the first signal received during each radar pulse repetition interval, means for selectively applying when actuated said first output pulse as said control signal to said second means and for selectively applying when deactuated said auxiliary pulse as said control signal to said second means, and means for applying said second output pulse to said selectively applying means for actuating said selectively applying means.

3. In a pulsed radar signal tracking receiver, first, second and third means for tracking received signals in the respective polar coordinates of range, elevation and azimuth, said second and third means for tracking being adapted to be actuated solely during the occurrence of a control signal, said first means for tracking in range producing a first output pulse positionable in range and a second output pulse upon the coincidence of said first output pulse and received signal, means resettable at the radar pulse repetition rate for deriving an auxiliary pulse in response to the first signal recEived during each radar pulse repetition interval, switching means for selectively applying when actuated said first output pulse as said control signal to said second and third means and for selectively applying when deactuated said auxiliary pulse as said control signal to said second and third means, and means for applying said second output pulse to said switching means for actuating said switching means.

4. Apparatus as defined in claim 3 wherein said means for deriving said auxiliary pulse includes bistable means responsive to received signals and radar pulse repetition rate triggers for producing an output waveform having a leading edge determined by the occurrence of the first signal received during each radar pulse repetition interval and a trailing edge coherent with a respective one of said triggers, and means responsive to the leading edge of said output waveform for producing said auxiliary pulse.