Multi-band imaging and adaptive beam-steering techniques for the submillimetre-wave range

Imaging at submillimetre-wave frequencies is of considerable interest thanks to potentially superior performance at longer stand-off ranges in comparison to mm-wave imaging thanks to improved angular resolution. In this paper we discuss the performance of multispectral passive imaging system centred...

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Main Authors: Luukanen, A., Ala-Laurinaho, J., Hakli, J., Gomes-Martins, D., Kiuru, T., Leivo, M., Rautiainen, A., Saily, J., Tamminen, A., Toivanen, H., Tuovinen, R., Raisanen, A.
Format: Conference Proceeding
Language:English
Subjects:
Beam steering
Broadband antennas
concealed weapons detection
Imaging
Materials
millimetre-wave imaging
Radar imaging
radiometry
reflectarray
RF-MEMS
submillimetre-wave imaging
THz imaging
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Summary:Imaging at submillimetre-wave frequencies is of considerable interest thanks to potentially superior performance at longer stand-off ranges in comparison to mm-wave imaging thanks to improved angular resolution. In this paper we discuss the performance of multispectral passive imaging system centred around 250, 400 and 750 GHz. Multi-band imagery is interesting given its potential for rudimentary materials differentiation, a capability that would substantially benefit e.g. security imaging applications. The passive imaging activities are complemented by activities towards developing rapid electronic beam steering capability for imaging submm-wave radars. Results from two project aiming at constructing such beam steering systems at 120 GHz and at 650 GHz are presented.