Title :
Distant detection of hidden objects with a THz imaging radar
Author :
Semenov, Alexei D. ; Richter, Heiko ; Böttger, Ute ; Smirnov, Andrey V. ; Hübers, Heinz-Wilhelm
Author_Institution :
Inst. of Planetary Res., German Aerosp. Center, Berlin
Abstract :
Detection of concealed threats at large distances is a key issue in public security. The paper describes a 0.8-THz radar that is capable to indicate hidden objects at a distance of more than 20 meter with a spatial resolution of less than 1 cm. The radar scans the scene with a narrow terahertz beam and uses heterodyne receiver with a hot-electron bolometer mixer. With integration time of 0.3 sec the receiver distinguishes a temperature difference of 2 K at the 20 m distance.
Keywords :
bolometers; image resolution; object detection; radar imaging; submillimetre wave imaging; THz imaging radar; distance 20 m; distant detection; frequency 0.8 THz; heterodyne receiver; hidden objects detection; hot-electron bolometer mixer; narrow terahertz beam; public security; spatial resolution; Bolometers; Detectors; Frequency; Object detection; Optical imaging; Optical receivers; Optical transmitters; Radar detection; Radar imaging; Spatial resolution; Antenna-coupled terahertz detectors; Beam steering; Imaging; Radar;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516666
