Zhao Xiaowen

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The design of a non-uniform circular array with the minimum number of antenna elements for a desired sidelobe level (SLL) under the constraint of a fixed beam width is presented. The related synthesis is formulated and relaxed to a convex problem. The convex optimization method is proposed to determine an optimum set of weights and locations of the(More)
Sparse concentric ring arrays composed of aperiodic rings with elements equally spaced in each ring are capable of achieving circularly symmetric patterns with low sidelobe level (SLL) compared with the thinning concentric ring arrays. Here teaching learning based optimization (TLBO) algorithm which is based on stochastic optimization is first applied to(More)
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