Permittivity estimation of multilayered dielectrics by wall-thru radar image

Using wall-through radar, we obtain image of wall and target by means of scanning an antenna mechanically or electrically. In this case, the wall information, permittivity and thickness, are necessary in order to compensate position shift of the image caused by the delay phase of the wall. So, we can inversely estimate the permittivity by comparing with same target image position with no wall image. In this paper, we propose novel method to estimate equivalent permittivity of multilayered dielectric flat plate.