Communication system with automatic antenna beam steering

Claim 1

A METHOD OF AUTOMATICALLY ROTATING A DIRECTIVE BEAM PRODUCED FROM AN ANTENNA ARRAY AND AUTOMATICALLY FIXING IT TO THE DIRECTION FROM WHICH AN UNKNOWN SIGNAL EMANATES COMPRISING THE STEPS OF RECEIVING SAID SIGNAL BY A FIRST ANTENNA, RECEIVING SAID SAME SIGNAL BY A SECOND ANTENNA, MODULATING THE SIGNAL RECEIVED FROM SAID FIRST ANTENNA AT A PREDETERMINED FREQUENCY BY A FIRST MODE OF MODULATION, COMBINING THE MODULATED SIGNAL WITH THE SIGNAL RECEIVED FROM SAID SECOND ANTENNA WHEREBY SAID COMBINED SIGNAL WILL HAVE A MODULATION COMPONENT DEPENDENT UPON THE MODULATING SIGNAL AND WHEREBY SAID MODULATING COMPONENT WILL HAVE A PHASE SHIFT AS COMPARED WITH THE MODULATING SIGNAL EQUAL TO THE PHASE SHIFT BETWEEN THE SIGNALS RECEIVED AT THE RESPECTIVE ANTENNAS, DEMODULATING SAID COMBINED SIGNALS BY A SECOND MODE OF MODULATION TO DETECT THE STRENGTH OF SAID MODULATING SIGNAL, AND COMPARING THE MODULATING SIGNAL AND THE SAID DEMODULATED SIGNAL AND THEREAFTER CONTROLLING THE AMOUNT OF PHASE SHIFT APPLIED TO SAID RECEIVED SIGNAL IN ACCORDANCE WITH THE COMPARED SIGNALS, WHEREBY SAID DIRECTIVE BEAM IS ROTATED IN A MANNER TO ELIMINATE THE PHASE SHIFT BETWEEN RECEIVED SIGNALS.