The Pacific Northwest National Laboratory (PNNL) has recently developed an active 3D microwave/millimeter-wave shoe scanner. This system is designed to detect threats concealed within the soles of common footwear. The system operates over the 10-40 GHz frequency range for excellent penetration of common materials. The system presents several challenges for efficient image reconstruction, including the thick dielectric window, multi-row linear arrays, and focusing close to the antenna elements. In this paper, an efficient back-projection reconstruction algorithm is presented that overcomes these challenges. Experimental imaging results are shown that demonstrate high-resolution imaging performance for this new scanner.
Revised: May 5, 2020 |
Published: April 23, 2020
Citation
Sheen D.M., R.T. Clark, J.R. Tedeschi, J.D. McCall, T.S. Hartman, and A.M. Jones. 2020.Efficient Image Reconstruction Method for a Millimeter-wave Shoe Scanner. In Passive and Active Millimeter-Wave Imaging XXIII; SPIE Defense and Commercial Sensing. Proceedings of the SPIE, edited by D.A. Wikner and D.A. Robertson, 11411, Paper No. 114110B. Bellingham, Washington:SPIE.PNNL-SA-152509.doi:10.1117/12.2560368