Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 56, Issue 12, Pages 2771-2778Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2008.2007081
Keywords
Millimeter waves; submillimeter-wavelength imaging; terahertz radar; terharertz (THz)
Categories
Funding
- National Aeronautics and Space Administration (NASA)
- Division of Biology, California Institute of Technology
- Naval Explosive Ordnance Disposal Technology Division
- Department of Defense (DoD) Physical Security Equipment Action Group (PSEAG)
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We show experimentally that a high-resolution imaging radar operating at 576-605 GHz is capable of detecting weapons concealed by clothing at standoff ranges of 4-25 m. We also demonstrate the critical advantage of 3-D image reconstruction for visualizing hidden objects using active-illumination coherent terahertz imaging. The present system can image a torso with <1 cm resolution at 4 in standoff in about five minutes. Greater standoff distances and much higher frame rates should be achievable by capitalizing on the bandwidth, output power, and compactness of solid state Schottky-diode based terahertz mixers and multiplied sources.
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