Coherent focusing radar system

Claim 1

A SYSTEM FOR FOCUSING ON A MOVING OBJECT COMPRISING A FIRST TRANSMITTING CHANNEL MEANS FOR TRANSMITTING FIRST SIGNAL, A SECOND TRANSMITTING CHANNEL MEANS FOR TRANSMITTING A SECOND SIGNAL, A FREQUENCY SOURCE MEANS PROVIDING A CARRIER FREQUENCY COUPLED TO EACH OF SAID CHANNEL MEANS, A TAG FREQUENCY OSCILLATOR, MEANS FOR APPLYING THE OUTPUT FROM SAID TAG FREQUENCY OSCILLATOR TO SAID FIRST TRANSMITTING CHANNEL TO PROVIDE A TAG FREQUENCY MODULATION TO SAID FIRST SIGNAL, SAID SECOND TRANSMITTING CHANNEL INCLUDING DUPLEX MEANS TO ALLOW RECEPTION, AM MEANS COUPLED TO SAID SECOND TRANSMITTING CHANNEL THROUGH SAID DUPLEX MEANS IN SAID SECOND TRANSMITTING CHANNEL TO PROVIDE DETECTION OF AM COMPONENTS FROM THE RECEIVED SIGNAL, FM MEANS COUPLED TO SAID SECOND TRANSMITTING CHANNEL THROUGH SAID DUPLEX MEANS IN SAID SECOND TRANSMITTING CHANNEL TO PROVIDE DETECTION OF FM COMPONENTS FROM THE RECEIVED SIGNAL, PHASE DETECTOR MEANS RESPONSIVE TO SAID AM COMPONENTS, FIRST REFERENCE MEANS TO COUPLE SAID TAG FREQUENCY OSCILLATOR TO SAID PHASE DETECTOR MEANS, SECOND REFERENCE MEANS TO COUPLE THE OUTPUT FROM SAID FM MEANS TO SAID PHASE DETECTOR MEANS, AND SWITCH MEANS TO SELECT ONE OF SAID FIRST AND SECOND REFERENCE MEANS AND APPLY THE OUTPUT THEREOF TO SAID PHASE DETECTOR MEANS, AND MEANS RESPONSIVE TO THE OUTPUT OF SAID DETECTOR MEANS TO VARY THE PHASE OF SAID FIRST SIGNAL.