Multistatic 3D Whole Body Millimeter-Wave Imaging for Explosive Detection
on December 6, 2019 from 10:00 AM to 11:30 AM
Professor Carey M. Rappaport, Northeastern University, Boston MA
Most of the airport passenger security systems use
millimeter-wave radar portals to detect threats concealed under clothing. These
sophisticated sensors employ advanced RF radar modules and GPU-based
accelerated processing. While they are very sensitive, alerting on even small
anomalies, they are prone to false alarms, which lead to invasive pat-downs.
New research in multistatic
focusing radar systems has the potential to improve detection and lower false
alarms. Improvements in the antenna system and in the inversion algorithms help
rule out innocent objects while making the detection of non-shape-specific
anomalies more likely, without increasing the processing time.
A proposed toroidal reflector
antenna, consisting of a tilted ellipse rotated about the vertical axis,
provides for multiple, overlapping high-resolution nearfield beams that form
multi-view, true multistatic mm-wave imaging for security applications. Modeled results indicate the point spread
function (PSF) on a torso target is wide and short, allowing for quickly
computed 2D images which can be stacked to reconstruct detailed 3D surfaces. The elliptical curvature in the vertical plane
focuses beams to narrow horizontal slices on the object to be imaged. With only this slice illuminated, the
scattered field will be due to just this narrow portion of the subject,
allowing for computationally simple inversion of a one-dimensional contour
rather than an entire two-dimensional surface.
Stacking the reconstructed contours for various horizontal positions
provides the full object image.
Assuming typical smooth variations of the human body surfaces, the object
detection is performed by comparing the retrieved surface with a smoothed one. In
addition, weak dielectric explosive threats can be detected as foreign objects,
and distinguished from innocuous concealed items. The improved advanced imaging
technology system has the promise of reducing false alarms and minimizing
pat-downs at airport security lines.
Carey M. Rappaport received
five degrees from the Massachusetts Institute of Technology: the SB in Mathematics, the SB, SM, and EE in
Electrical Engineering in June 1982, and the PhD in Electrical Engineering in
June 1987. He is married to Ann W.
Morgenthaler, and has two children, Sarah and Brian.
Rappaport joined the faculty at Northeastern University in Boston, MA in
1987. He has been Professor of
Electrical and Computer Engineering since July 2000. In 2011, he was appointed
College of Engineering Distinguished Professor.
He was Principal Investigator of an ARO-sponsored Multidisciplinary
University Research Initiative on Humanitarian Demining, Co-Principal
Investigator and Associate Director of the NSF-sponsored Engineering Research
Center for Subsurface Sensing and Imaging Systems (CenSSIS), and Co-Principal
Investigator and Deputy Director of the DHS-sponsored Awareness and
Localization of Explosive Related Threats (ALERT) Center of Excellence.
Rappaport has authored over 425 technical journal and conference papers in the
areas of microwave antenna design, electromagnetic wave propagation and
scattering computation, and bioelectromagnetics, and has received two reflector
antenna patents, two biomedical device patents and three subsurface sensing
device patents. He was awarded the IEEE
Antenna and Propagation Society's H.A. Wheeler Award for best applications
paper, as a student in 1986. He is a
member of Sigma Xi and Eta Kappa Nu professional honorary societies.
Qualcomm AZ-Auditorium (10155 Pacific Heights Blvd, San Diego, CA 92121) Non-Qualcomm attendees: Please arrive 10-15 minutes early to find street parking or in nearby Qualcomm parking structures.
10:00am - 10:10am Sign-in and networking
10:10am - 11:30am Seminar and Q&A