H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
343/45
H01Q 3/22 (2006.01) H01Q 1/28 (2006.01) H01Q 3/24 (2006.01) H01Q 3/26 (2006.01) H01Q 25/02 (2006.01)
Patent
CA 1337569
An angular position determining system utilizing an electronically scanned, linear phased array antenna radar system. The teachings of the present invention are applicable to airborne, ground or sea based radar systems for determining either elevation of azimuth. In one disclosed embodiment mounted in an aircraft for determining elevation, the linear phased array antenna is formed by a conformal wing array of radiating and receiving elements, wherein the phase front of the antenna beam can be controlled to steer the antenna beam by individually controlling the gain and phase excitation of each radiating element. The array comprises a left portion of the array and a right portion of the array, and each of the left and right portions is formed by a first plurality of elements tilted downwardly in elevation and a second plurality of elements tilted upwardly in elevation. The output signals from the left upwardly tilted plurality of elements are summed to form an up left sum signal, and the output signals from the left downwardly tilted plurality of elements are summed to form a down left sum signal. Similarly, the output signals from the right upwardly tilted plurality of elements are summed to form an up right sum signal, and the output signals from the right downwardly tilted plurality of elements are summed to form a down right sum signal. Additionally, the up left sum signal and the up right sum signal are summed to form a composite up sum signal and the down left sum signal and the down right sum signal are summed to form a composite down sum signal. Finally, the difference is taken between the composite up sum signal and the composite down sum signal to form a delta elevation signal representing the measured elevation output of the system.
609968
Benz Kenneth D.
Lory John
Grumman Aerospace Corporation
Mcfadden Fincham
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