Simplified monopulse radar receiver

Claim 1

APPARATUS COMPRISING A RADAR O THE SIMULTANEOUS LOBING TYPE, SAID RADAR TRANSMITTING A POSITIONABLE DIRECTIVE BEAM OF ELECTROMAGNETIC ENERGY AND PRODUCING FIRST AND SECOND MICROWAVE TARGET ECHO SIGNALS OF THE SAME FREQUENCY, SAID FIRST ECHO SIGNAL HAVING AN AMPLITUDE REPRESENTING THE DEVIATION OF THE TARGET FROM THE DIRECTIVE AXIS O SAID BEAM AND HAVING A PHASE RELATIVE TO SAID SECOND ECHO SIGNAL REPRESENTING THE SENSE O SAID DEVIATION, A MICROWAVE MODULATOR FOR AMPOLITUDE MODULATING SAID FIRST ECHO SIGNAL AT A PREDETERMINED FREQUENCY, A HYBRID JUNCTION HAVING FIRST AND SECOND INPUTS, SAID FIRST INPUT BEING CONNECTED TO THE OUTPUT O SAID MICROWAVE MODULATOR, SAID SECOND ECHO SIGNAL BEING APPLIED TO SAID SECOND INPUT, SAID HYBRID JUNCTION PRODUCING FIRST AND SECOND OUTPUT SIGNALS RESPECTIVELY REPRESENTING THE SUM OF AND THE DIFFERENCE BETWEEN THE MICROWAVE SIGNALS APPLIED TO RESPECTIVE ONES OF SAID INPUTS, A PAIR OF DETECTORS MEANS OR APPLYING SAID FIRST OUTPUT SIGNAL TO ONE OF SAID DETECTORS, MEANS FOR APPLYING SAID SECOND OUTPUT SIGNAL TO THE OTHER OF SAID DETECTORS, MEANS CONNECTED TO BOTH SAID DETECTORS OR DIFFERENTLY COMBINING THE SIGNALS PRODUCED AT THE RESPECTIVE OUTPUTS THEREO, A PHASE COMPARISON CIRCUIT HAVING FIRST AND SECOND INPUTS, SAID FIRST INPUT BEING CONNECTED TO THE OUTPUT OF SAID MEANS FOR DIFFERENTIALLY COMBINING, A SOURCE OF ALTERNATING SIGNALS HAVING SAID PREDETERMINED FREQUENCY CONNECTED TO SAID SECOND INPUT, AND MEANS FOR POSITIONING SAID DIRECTIVE BEAM, THE OUTPUT OF SAID PHASE COMPARISON CIRCUIT BEING COUPLED TO SAID LAST-NAMED MEANS.