Pulse compression radar system

Claim 1

AN ELECTRONIC ECHO-RANGING SYSTEM, COMPRISING MEANS FOR GENERATING AND TRANSMITTING CARRIER WAVE PULSES OF A GIVEN AMPLITUDE AND DURATION, EACH OF SUCH PULSES BEING MODULATED IN FREQUENCY OVER A GIVEN FREQUENCY RANGE; MEANS FOR RECEIVING ECHO PULSES CORRESPONDING TO SUCH TRANSMITTED PULSES; MEANS FOR CONVERTING SUCH RECEIVED PULSES OF CARRIER WAVE FREQUENCY INTO CORRESPONDING PULSES OF INTERMEDIATE FREQUENCY; A PLURALITY OF DELAY LINE MEANS OF INCREMENTALLY DIFFERENT LENGTH; MEANS FOR APPLYING EACHOF SUCH INTERMEDIATE FREQUECY PULSES TO THE INPUT OF ALL OF SAID DELAY LINE MEANS SIMULTANEOUSLY; MEANS INTERCONNECTING THE OUTPUTS OF SAID SEVERAL DELAY LINE MEANS IN ORDERED INCREMENTAL SEQUENCE, WITH THE OUTPUTS OF EACH PAIR OF ADJACENT DELAY LINE MEANS BEING CONNECTED IN PHASE OPPOSITION TO PROVIDE RESPECTIVE HYBRID INTERMEDIATE FREQUENCY SIGNALS EACH CONSTITUTING A TIMEDISPLACED PAIR OF OUTPUT SIGNALS FROM SUCH RESPECTIVE ADJACENT DELAY LINE MEANS; A PLURALITY OF NARROW-BAND FILTER MEANS TO EACH OF WHICH A RESPECTIVE ONE OF SUCH HYBRID SIGNALS IS APPLIED, EACH OF SAID FILTER MEANS BEING TUNED TO A RESPECTIVELY DIFFERENT PORTION OF SAID MODULATION FREQUENCY RANGE; MEANS FOR COMBINING THE OUTPUTS OF SAID SEVERAL FILTER MEANS FOR PROVIDING AN OUTPUT, AND MEANS ATIVE OF THE SUMATION OF SUCH FILTER OUTPUTS, AND MEANS FOR DETECTING THE OUTPUT OF SAID SUMMATION MEANS TO PROVIDE AN OUTPUT CORRESPONDING TO THE MODULATION EMPLOYED IN SAID TRANSMITTING MEANS, WHEREBY THE PULSES CONSTITUTING THE OUTPUT OF SAID SUMMATION MEANS ARE OF SHORTER DURATION AND GREATER AMPLITUDE THAN SUCH RECEIVED ECHO PULSES.