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International Journal of Antennas and Propagation
Volume 2014, Article ID 248351, 8 pages
Research Article

On the Use of Passive Reflecting Surfaces and Compressive Sensing Techniques for Detecting Security Threats at Standoff Distances

ALERT Center of Excellence for the Department of Homeland Security, Gordon CenSSIS, Northeastern University, Boston, MA, USA

Received 28 December 2013; Revised 30 March 2014; Accepted 30 March 2014; Published 2 July 2014

Academic Editor: Tat Soon Yeo

Copyright © 2014 Yolanda Rodriguez-Vaqueiro and Jose Angel Martinez-Lorenzo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This work presents a new radar system concept, capable of detecting explosive related threats at standoff distances. The system consists of a two-dimensional aperture of randomly distributed transmitting/receiving antenna elements and a set of passive reflecting surfaces (PRS) positioned in the vicinity of the target. The PRS act as a mirror that enhances the field of view of the radar system, thus increasing its resolution. A 3D imaging algorithm, based on novel compressive sensing techniques, is used in this work. This system configuration provides a resolution of 7.1 mm in cross-range and 25 mm in range, when the target is at 10 m range, and the radar works at 60 GHz center frequency and has 6 GHz bandwidth.