Study on Polarization Rotation of Electromagnetic Plane Wave from Rough Surface

Polarimetric technology has attracted huge attention in the Ground Penetrating Radar (GPR) community during recent decades. Polarization signal analysis has been applied to identify subsurface fractures, pipes, and unexploded ordnance. But there are many factors that can cause distortion of the polarization information, such as the ground surface and the soil. In order to obtain more accurate scattering information of the subsurface targets and reduce or eliminate these effects, we discuss the reason why the direction of polarization of the electromagnetic wave is rotated when it propagate through the media interface. When the plane electromagnetic wave is propagating through Gaussian rough surface, the transmission coefficient can be presented using the Kirchhoff scalar approximation. In this paper, The polarization rotation characteristics of transmission coefficient was obtained and some significant results were analyzed in detail.