Polarimetric Detection of Buried Objects by Fm-cw Radar

The subsurface radar suffers from strong clutter from surface and severe wave attenuation in the underground. This paper presents a unique countermeasure to these problems using a polarimetric FM-CW radar equipped with equivalent time sensitivity control (STC) technique. We first apply the polarimetric filtering principle to suppress surface clutter, then, use an equivalent STC technique suited for FM-CW radar for a deep sounding to compensate wave attenuation. These techniques contribute to a significant improvement of the radar performance. The field experiments were carried out to show the usefulness of the method.