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Penetrating 3-D Imaging at 4- and 25-m Range Using a Submillimeter-Wave Radar

2008; IEEE Microwave Theory and Techniques Society; Volume: 56; Issue: 12 Linguagem: Inglês

10.1109/tmtt.2008.2007081

1557-9670

Ken B. Cooper, Robert J. Dengler, Nuria Llombart, Tomas Bryllert, Goutam Chattopadhyay, Erich Schlecht, J. Gill, C. Lee, A. Skalare, Imran Mehdi, Peter H. Siegel,

Semiconductor Quantum Structures and Devices

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 m 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.