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A 2-D near-field focusing design is proposed based on the circular slot arraywaveguide structures, synthesized using the array-factor theory, anddemonstrated by full-wave simulations. The principle of beam-focusing isextended to the 2-D angularly discretized configuration using regularcenter-fed linear slots arranged in a circular pattern. By the mirror imagearrangement of the slots, a linearly polarized focus in the near-field of theantenna, with negligible cross-polarization is achieved. Its beam-focusingproperties are discussed in details and demonstrated by simulations.

The 2D Linearly Polarized Near-Field Focusing Based on Angularly Discretized Slot Arrays