Fast two-dimensional THz imaging using rail-based synthetic aperture radar (SAR) processing

Abstract

The authors present a terahertz-band imaging system using rail-based synthetic aperture radar sensing and processing. In the proposed setup, the object is inclined with respect to the transmitter and is scanned in azimuth using a motorised linear stage. The single-transceiver system is based on one-port full-duplex frequency extender module coupled with a vector network analyser. Processing the reflection data recorded in the frequency domain, it is possible to reconstruct high-resolution two-dimensional images of objects and voids concealed behind material layers in the 220-355 and 500-750 GHz bands with sub-millimetre resolution.