Abstract
A millimeter-wave self-progressive near-field-focused (NFF) 2-D frequency scanning array antenna is presented in this paper. A compact self-progressive phase-shift network without additional area is proposed to generate the desired high phase progression. The ridge-gap waveguide is applied to build the compact double-layer folded transmission line with the contactless structure. Simulation results present a good focusing performance in the near-field (NF) region, showing good prospects in NF fast-scanning applications, e.g., electromagnetic imaging and detecting systems.
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