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29 April 2009 Polarization coherency through various scattering mechanisms
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A backscattered signal is coherently or incoherently polarized depending on the nature of the scattering surface and the bandwidth of the incident signal. In various applications, and more realistic scenarios, multi spectra or Ultra Wide Band (UWB) have certain advantages over narrow band signals especially in target detection or resolution. Under these circumstances, we investigate the depolarizing effects of wide band signals to understand the relationship of coherency or incoherency with various scattering mechanisms such as reflection/transmission or diffraction. In other words, these major scattering mechanisms may depolarize a signal incoherently in one instance while coherently in another. In this paper we present results showing that the coherency or incoherency of a signal is highly dependent on the nature of the scatterer in relationship to the bandwidth of the incident signal. We use the Finite Difference Time Domain (FDTD) methodology to analyze signals scattering off various homogenous or inhomogeneous surfaces.
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Kevin Walker, Glafkos Stratis, Salvatore Bellofiore, and Alphonso Samuel "Polarization coherency through various scattering mechanisms", Proc. SPIE 7308, Radar Sensor Technology XIII, 73080W (29 April 2009); doi: 10.1117/12.819872;

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