The 2D Linearly Polarized Near-Field Focusing Based on Angularly Discretized Slot Arrays
Chen, Menglin · Gupta, Shulabh · Ma, Zilong · Jiang, Lijun
Original · EN
A 2-D near-field focusing design is proposed based on the circular slot array waveguide structures, synthesized using the array-factor theory, and demonstrated by full-wave simulations. The principle of beam-focusing is extended to the 2-D angularly discretized configuration using regular center-fed linear slots arranged in a circular pattern. By the mirror image arrangement of the slots, a linearly polarized focus in the near-field of the antenna, with negligible cross-polarization is achieved. Its beam-focusing properties are discussed in details and demonstrated by simulations.
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