Characterizing surface profiles utilizing mm-wave FMCW SAR imaging

In this paper the results from characterizing complex surface profiles with a synthetic aperture radar operating at frequencies up to approx. 250 GHz are presented. The radar uses a bandwidth of 38GHz and a maximum synthetic aperture of 40 cm times 40 cm and is thus rectangular and uniformly sampled. A fast parallel backprojection algorithm that can be used with general purpose GPUs is used for image reconstruction. The performance of the measurement system is evaluated with respect to the range- and cross-range-resolution as well as the overall measurement error on a given reference surface. Also the measurement performance on sharp edges is considered.

[1]  N. Pohl,et al.  A 240 GHz ultra-wideband FMCW radar system with on-chip antennas for high resolution radar imaging , 2013, 2013 IEEE MTT-S International Microwave Symposium Digest (MTT).

[2]  Lorenz-Peter Schmidt,et al.  3D SAR Processing for a Fast Scanning Millimetre-Wave Short Range Imaging System , 2008 .

[3]  LeRoy A. Gorham,et al.  SAR image formation toolbox for MATLAB , 2010, Defense + Commercial Sensing.

[4]  W. Grundfest,et al.  THz Medical Imaging: in vivo Hydration Sensing , 2011, IEEE Transactions on Terahertz Science and Technology.