The Submillimeter-Wave Technology Laboratory (STL) at the University of Massachusetts Lowell has investigated the
electromagnetic scattering behavior of various broadband absorbers. Several absorbing materials were tested in a
compact radar range operating at a center frequency of 160 GHz. The polarimetric radar cross section was measured at
elevation angles from 15° to 75°. In addition to the backscattering behavior, the normal incidence transmittance of the
materials was evaluated.