Antenna switching system

Claim 1

A DOPPLER NAVIGATION SYSTEM FOR A VEHICLE COMPRISING AN ANTENNA ARRAY FIXED RELATIVE TO SAID VEHICHLE, FOUR WAVEGUIDE COUPLINGS FOR INDIVIDUALLY ENERGIZING SAID ARRAY TO PRODUCE FOUR DISTINCT BEAM POSITIONS EXTENDING AT PREDETERMINED ANGLES FROM SAID VEHICLE, A MICROWAVE TRANSMITTER, A PAIR OF FOUR-PORT CIRCULATORS EACH HAVING AN ISOLATED INPUT AND OUTPUT SWITCHABLE BETWEEN THE REMAINING PAIR OF TERMINALS OF THE FOUR-PORT, A FIRST MICROWATE SWITCH OPERABLE ALTERNATELY TO COUPLE SAID TRANSMITTER TO SAID INPUTS OF SAID PAIR OF CIRCULATORS, A MICROWAVE RECEIVER, A SEFOND MICROWAVE SWITCH OPERABLE ALTERNATELY TO COUPLE SAID RECEIVER TO SAID OUTPUTS OF SAID PAIR OF CIRCULATORS, COUPLING CONNECTIONS BETWEEN THE REMAINING PAIRS OF TERMINALS OF BOTH OF SAID CIRCULATORS AND SAID FOUR WAVEGUIDE COUPLINGS RESPECTIVELY, MEANS FOR SWITCHING SAID FIRST AND SECOND SWITCHES IN UNISON TO CONNECT SAID TRANSMITTER AND SAID RECEIVER TO THE SAME CIRCULATOR, AND MEANS FOR SWITCHING SAID CIRCULATORS.