Radar system for determining angular position utilizing a linear phased array antenna

A system for determing angular position utilizing an electronically scanned, linear phased array antenna radar system, comprising:

• a. an electronically scanned, linear phased array antenna comprising an array of radiating and receiving elements positioned along an array axis, wherein the phase front of the antenna beam can be controlled to steer the antenna beam by individually controlling the phase excitation of each radiating element, said array of elements comprising a left portion of the array having a first plurality of elements pointing in a first direction, and a second plurality of elements pointing a second direction angularly displaced with respect to said first direction, and further comprising a right portion of the array having a first plurality of elements pointing in said first direction, and a second plurality of elements pointing in said second direction;
• b. means for summing the output signals from the left second direction pointing plurality of elements to form a second direction left sum signal, and means for summing the output signals from the left first direction pointing plurality of elements to form a first direction left sum signal;
• c. means for summing the output signals from the right second direction pointing plurality of elements to form a second direction right sum signal, and means for summing the output signals from the right first direction pointing plurality of elements to form a first direction right sum signal;
• d. means for summing the second direction left sum signal and the second direction right sum signal to form a composite second direction sum signal, and means for summing the first direction left sum signal and the first direction right sum signal to form a composite first direction sum signal;
• and
• e. means for taking the difference between the composite second direction sum signal and the composite first direction sum signal to form a delta angular position signal representing the measured angular position output of the system.