Millimeter-wave (MMW) imaging has a wide prospect in application of concealed weapons detection. We propose a circular-arc multiple-input multiple-output (MIMO) array scheme with uniformly spaced transmit and receive antennas along the horizontal-arc direction, while scanning along the vertical direction. The antenna beams of the circular-arc MIMO array can provide more uniform coverage of the imaging scene than those of the linear or planar MIMO arrays. Further, a near-field three-dimensional (3-D) imaging algorithm, based on the spatial frequency domain processing, is presented with analysis of sampling criteria and resolutions. Numerical simulations, as well as comparisons with the back-projection (BP) algorithm, are provided to show the efficacy of the proposed approach.
@article{arxiv.2102.13418,
title = {Near-Field Millimeter-Wave Imaging via Circular-Arc MIMO Arrays},
author = {Shiyong Li and Shuoguang Wang and Guoqiang Zhao and Houjun Sun},
journal= {arXiv preprint arXiv:2102.13418},
year = {2021}
}
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arXiv admin note: text overlap with arXiv:2101.08982