Noise temperature of a lossy flat-plate reflector for the elliptically polarized wave-case

This short paper presents the derivation of equations necessary to calculat e noise temperature of a lossy flat-plate reflector, Reflector losses can b e due to metallic surface resistivity and multilayer dielectric sheets, inc luding thin layers of plating, paint, and primer on the reflector surface. The incident wave is elliptically polarized, which is general enough to inc lude linear and circular polarizations as well. The derivations show that t he noise temperature for the circularly polarized incident wave ease is sim ply the average of those for perpendicular and parallel polarizations.