Effect of periodic roughness and surface defects on the terahertz scattering behavior of cylindrical objects

Abstract

This paper discusses the effect of periodic roughness and surface defects on the electromagnetic scattering of terahertz waves from cylindrical objects. The cylinders, possessing periodic roughness imparted during their fabrication process, had average roughness values ranging from approximately 0.1 μm - 0.50 μm. Metallic cylinders were fabricated from lathe-turned aluminum rods and dielectric cylinders were fabricated using a rapid prototype technique (stereolithography). The scattering behavior of the rough cylinders was measured in 160 GHz and 350 GHz compact radar ranges. In addition, the effect of seams and grooves on the scattering behavior of cylinders will also be presented.