Pulse compression radar tracking system

Claim 1

A PULSE RADAR SYSTEM FOR PROVIDING PULSE COMPRESSION COMPRISING: AN OSCILLATOR PRODUCING AN OUTPUT AT A FUNDAMENTAL FREQUENCY; HARMONIC GENERATING MEANS RECEIVING THE OSCILLATOR OUTPUT, THE HARMONIC GENERATING MEANS HAVING AN OUTPUT CONTAINING THE FUNDAMENTAL FREQUENCY AND AT LEAST ONE HARMONIC FREQUENCY OF THE FUNDAMENTAL FREQUENCY; FILTER MEANS RECEIVING THE OUTPUT OF THE HARMONIC GENERATING MEANS, SAID FILTER MEANS FUNCTIONING TO SEPARATE THE FUNDAMENTAL FREQUENCY AND EACH OF THE HARMONIC FREQUENCIES FROM ONE ANOTHER AND TO DELIVER EACH OF THESE FREQUENCIES TO A SEPARATE OUTPUT; GATE MEANS RECEIVING EACH OF THE OUTPUTS OF THE FILTER MEANS, SAID GATE MEANS HAVING A SINGLE OUTPUT AND OPERATING TO CONNECT CONSECUTIVELY AND FOR AN EQUAL DURATION OF TIME EACH OF THE FILTER MEANS OUTPUTS, IN SEQUENCE FROM THE FUNDAMENTAL FREQUENCY TO THE HIGHEST ORDER HARMONIC FREQUENCY, TO THE GATE MEANS OUTPUT, WHEREBY THE SEQUENCE OF OUTPUT FREQUENCIES FORMS A COMPOSITE PULSE AT A DESIRED FREQUENCY, EACH OF TE COMPONENT FREQUENCIES BEING A PULSE SEGMENT OF THIS COMPOSITE PULSE, NONE OF THESE COMPONENT FREQUENCIES BEING IN THE MICROWAVE REGION; A SECOND OSCILLATOR PRODUCING AN OUTPUT SIGNAL AT A DESIRED MICROWAVE FREQUENCY; MIXER MEANS RECEIVING THE COMPOSITE PULSE OUTPUT OF THE GATE MEANS AND THE MICROWAVE OUTPUT SIGNAL FROM SAID SECOND OSCILLATOR AND COMBINING THESE INPUTS; MICROWAVE FILTER MEANS RECEIVING THE OUTPUT OF THE MIXER MEANS AND PERMITTING PASSAGE ONLY OF THOSE FREQUENCIES IN THE MICROWAVE REGION; POWER AMPLIFIER MEANS ACCEPTING THE OUTPUT OF THE MICROWAVE FILTER MEANS AND AMPLIFYING THIS OUTPUT TO A LEVEL SUITABLE FOR RADAR TRANSMISSION; RADAR RECEIVER MEANS FOR RECEIVING A TARGET RETURN PULSE WHICH IS A REFLECTION OF THE TRANSMITTED PULSE FROM AN OBJECT TO BE DETECTED, SAID RECEIVER MEANS INCLUDING; A PLURALITY OF CHANNELS EQUAL IN NUMBER TO THE NUMBER OF OUTPUTS OF SAID FILTER MEANS, WHEREBY THERE IS PROVIDED A RECEIVER HAVING A CHANNEL FOR EACH OF THE PULSE SEGMENTS THAT COMPRISES THE COMPOSITE PULSE, THE TARGET RETURN SIGNAL BEING SUPPLIED TO THE INPUT OF EACH CHANNEL; LOCAL OSCILLATOR SOURCE; RECEIVER MIXER IN EACH OF THE CHANNELS, EACH OF THE RECEIVER MIXER MEANS RECEIVING THE TARGET RETURN SIGNAL AND A SIGNAL FROM A LOCAL OSCILLATOR SOURCE, THE FREQUENCIES OF EACH OF LOCAL OSCILLATOR SIGNALS BEING CHOSEN TO PRODUCE A PREDETERMINED INTERMEDIATE FREQUENCY OUTPUT SIGNAL WHEN MIXED WITH THE PULSE SEGMENT ASSOCIATED WITH A PARTICULAR CHANNEL; INTERMEDIATE FREQUENCY AMPLIFIER MEANS IN EACH OF THE CHANNELS, THE INTERMEDIATE FREQUENCY OUTPUT OF THE RECEIVER MIXER MEANS IN EACH CHANNEL BEING SUPPLIED TO AND AMPLIFIED BY THE INTERMEDIATE FREQUENCY AMPLIFIER MEANS IN THAT CHANNEL; DELAY MEANS IN EACH OF THE CHANNLES EXCEPT FOR THAT CHANNEL CORRESPONDING TO THE LAST-TRANSMITTED PULSE SEGMENT IN THE COMPOSITE PULSE, THE DELAY PERIODS INTRODUCED IN THESE CHANNELS BY THE DELAY MEANS DIFFERING FROM ONE ANOTHER AND BEING CHOSEN SO THAT THE PULSE SEGMENTS OF THE TARGET RETURN PULSES EXIT THEIR RESPECTIVE DELAY MEANS SIMULTANEOUSLY AND COINCIDENT WITH SAID LAST-TRANSMITTED PULSE SEGMENT; DETECTOR MEANS IN EACH CHANNEL RECEIVING THE RESPECTIVE PULSE SEGMENTS AT A TIME OF COINCIDENT OCCURRENCE, EACH DETECTOR MEANS DELIVERING AT ITS OUTPUT A VIDEO PULSE SEGMENT; AND ADDING MEANS RECEIVING THE OUTPUT OF ALL OF THE DETECFOR MEANS AND DELIVERING AN OUTPUT WHICH IS A SUMMATION OF THE COINCIDENT VIDEO PULSE SEGMENTS RECEIVED WHEREBY THE OUTPUT OF THE ADDING MEANS CONSTITUTES A VIDEO PULSE OF REDUCED WIDTH RELATIVE TO THE COMPOSITE PULSE.