Development of a High-Throughput Microwave Imaging System for Concealed Weapons Detection
MIT Lincoln Laboratory Lexington United States
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A video-rate microwave imaging aperture for concealed threat detection can serve as a useful tool in securing crowded, high foot traffic environments. Realization of such a system presents two major technical challenges 1 implementation of an electrically large antenna array for capture of a moving subject, and 2 fast image reconstruction on cost-effective computing hardware. This paper presents a hardware-efficient multistatic array design to address the former challenge, and a compatible fast imaging technique to address the latter. Prototype hardware which forms a partition of an imaging aperture is also discussed. Using this hardware, it is shown that the proposed array design can be used to form high-fidelity 3D images, and that the presented image reconstruction technique can form an image of a human-sized domain in less or equal to 0.1s with low cost computing hardware.
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