Synthesizing Uniform Sum and Difference Patterns by Controlling Steer Angle and Using Sub-Arrays
Synthesizing sum and difference patterns are usually achieved by controlling two separate sets of the amplitude and phase excitations of the radar antenna elements. In this paper, an alternative and effective approach is proposed.First, by equally partitioning the uniform array elements into two sub-arrays andthen by suitably controlling the steered angle of the beam pattern of each sub-array individually, it is possible to generate the required sum and difference patterns.Since the steering angle parameter is the most important in the proposed method, a general strategy is shown for the selection process of its value. Unlike the existing techniques, the feeding network in the proposed approach is much simpler in practical implementation.
