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9 June 2014 Surface and volumetric backscattering between 100 GHz and 1.6 THz
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Successful development of remote sensing and communication systems in the terahertz band requires a better understanding of the scattering behavior of various structures. Materials that could be considered homogeneous and smooth at microwave frequencies may begin to display surface and volumetric scattering behavior in the terahertz band. The co-polarization backscattering coefficient of several types of metal and dielectric structures were measured in indoor compact radar ranges operating at 100 GHz, 160 GHz, 240 GHz, and 1.55 THz. These structures consisted of roughened aluminum plates, as well as homogeneous and inhomogeneous dielectric surfaces. The roughness and inclusions of the measured samples were tailored in order to systematically investigate various scattering effects. Polarimetric backscattering measurements of these materials were collected at elevation angles from 5 to 75 degrees. Analysis of the backscatter data supports a better understanding of surface and volumetric scattering behavior of materials at terahertz frequencies.
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D. A. DiGiovanni, Andrew J. Gatesman, T. M. Goyette, and R. H. Giles "Surface and volumetric backscattering between 100 GHz and 1.6 THz", Proc. SPIE 9078, Passive and Active Millimeter-Wave Imaging XVII, 90780A (9 June 2014);

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