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Near-field wideband frequency invariant beamformer design for circular antenna arrays based on convex optimization

In this paper, a convex-optimization based design method is proposed to solve the near-field wideband beam former design problem with frequency invariant response. The objective is to find the weight vectors required for a uniform circular array capable of forming a beam with a pre defined side lobe attenuation level with desired frequency invariant response over a frequency band of interest against a particular target frequency for an arbitrary focal point within a given scanning area. Design examples have been provided for simulated results.