Radar interference rejection

Claim 1

IN A RADAR RECEIVER OF THE TYPE RECEIVING A FIRST INPUT SIGNAL CONSISTING OF SYNCHRONIZING PULSES AND A SECOND INPUT SIGNAL CONSISTING OF TARGET RETURN PULSES AND UNWANTED INTERFERENCE SIGNALS, INTERFERENCE REJECTION APPARATUS COMPRISING: FILTER MEANS FOR RECEIVING THE INPUT SIGNALS, THE OUTPUTS OF SAID FILTER MEANS CONSISTING ESSENTIALLY OF SYNC PULSES AND TARGET RETURN PULSES; RANGE STORAGE MEANS RECEIVING THE OUTPUTS OF SAID FILTER MEANS AND GENERATING RANGE VOLTAGES WHOSE MAGNITUDES ARE A FUNCTION OF THE TIME SEPARATION BETWEEN A SYNC PULSE AND ITS ASSOCIATED TARGET RETURN PULSE; VOLTAGE COMPARISON MEANS FOR COMPARING THE MAGNITUDE OF SAID RANGE VOLTAGES WITH THE RANGE SWEEP VOLTAGE OF THE RADAR RECEIVER, SAID VOLTAGE COMPARISON MEANS PRODUCING AN OUTPUT PULSE AT THE TIME WHEN THE RANGE SWEEP VOLTAGE EQUALS SAID RANGE VOLTAGE; COINCIDENCE GATE MEANS CONTROLLING THE PASSAGE OF THE SECOND INPUT SIGNAL TO OTHER SECTIONS OF THE RADAR RECEIVER, SAID COINCIDENCE GATE CONTROLLED BY THE OUTPUT OF THE VOLTAGE COMPARISON MEANS, PASSAGE OF THE SECOND INPUT SIGNAL THROUGH THE COINCIDENCE GATE BEING PERMITTED ONLY UPON THE SIMULTANEOUS OCCURRENCE OF THE SECOND INPUT SIGNAL AND AN OUTPUT PULSE FROM THE VOLTAGE COMPARISON MEANS; MEANS RESPONSIVE TO THE OUTPUT OF SAID COINCIDENCE GATE RENDERING SAID FILTER MEANS NON-CONDUCTIVE FOR A PREDETERMINED PERIOD OF TIME AFTER SAID COINCIDENCE GATE PASSES AN INPUT SIGNAL.