A Simplified Technique for Phase Control of Conformal Arrays
NAVAL RESEARCH LAB WASHINGTON DC
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One of the most important problems to be overcome in implementing conformal arrays is controlling the element phases for beam steering. A simplified approximate technique for controlling steering phases of conformal arrays on a general surface was developed. The technique is to divide the array into several subarrays and to judiciously locate the elements on the curved surface so that the conventional row -- column phase setting can be used in each subarray. Because of the approximate nature of the technique, some phase errors are introduced. However, for a given array size and shape of the conformal surface, the number of subarrays can be chosen such that phase errors are within a specified limit. Analytical and computed results are presented for the techniques application to arrays on circular and parabolic curves. The results show that in many practical cases the approximate technique can be used with negligible degradation in performance.
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