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

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

652

Lastpage

653

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICIMW.2007.4516666

Filename

4516666