Range gating system with narrow band filtering

Claim 1

A RADAR RECEIVER FOR FILTERING AND GATING PULSES OF RADIO FREQUENCY SIGNALS RECEIVED AT VARYING TIMES FROM AN ANTENNA, SAID RADIO FREQUENCY SIGNALS HAVING CHARACTERISTICS INDICATIVE OF DIRECTIONAL INFORMATION, SAID RECEIVER COMPRISING: A MIXER COUPLED TO SAID ANTENNA FOR DEVELOPING PULSES OF INTERMEDIATE FREQUENCY SIGNALS FROM SAID PULSES OF RADIO FREQUENCY SIGNALS; GATING MEANS COUPLED TO SAID MIXING MEANS FOR DEVELOPING FIRST AND SECOND SIGNALS HAVING AMPLITUDE CHARACTERISTICS INDICATIVE OF THE TIME OF RECEPTION OF SAID PULSES BY SAID ANTENNA; FILTERING MEANS COUPLED TO SAID GATING MEANS FOR DEVELOPING THIRD AND FOURTH SIGNALS IN RESPONSE TO SAID FIRST AND SECOND SIGNALS RESPECTIVELY, AND COUPLED TO SAID MIXER FOR DEVELOPING FIFTH SIGNALS FROM THE PULSES OF INTERMEDIATE FREQUENCY SIGNALS; COMBINING MEANS COUPLED TO SAID FILTERING MEANS FOR COMBINING SAID THIRD, FOURTH AND FIFTH SIGNALS INTO A COMMON SIGNAL; AND DETECTING AND PULSE FORMING MEANS COUPLED TO SAID COMBINING MEANS FOR DEVELOPING SIXTH SIGNALS INDICATIVE OF THE DIRECTIONAL INFORMATION, SAID DETECTING MEANS AND PULSE FORMING MEANS COUPLED TO SAID GATING MEANS TO CONTROL THE TIME OF GATING OF SAID PULSES RECEIVED FROM SAID ANTENNA.