Journal of Xidian University

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Electromagnetic scattering characteristic of Gaussian rough coated objects in terahertz

ZHAO Hua;GUO Lixin   

  1. (School of Physics and Optoelectronic Engineering, Xidian Univ., Xi'an 710071, China)
  • Received:2017-03-08 Online:2018-02-20 Published:2018-03-23


The scattering characteristics of Gaussian roughness surface coated targets are studied in the terahertz (THz) band based on the Kirchhoff approximation and the physical optics (PO) method. Based on the Gaussian roughness surface, roughness surface cone and cone-cylinder models are built which are meshed according to the frequency of the incident wave to meet the PO calculation requirements. According to the Fresnel reflection coefficient, the current on the surface is calculated, and then the radar cross section (RCS) of the coating rough target is obtained. The RCS of the rough surface target are compared with the smooth target. Numerical results for the rough coated cone model and cone-cylinder model are given and discussed from different coating dielectric media, different coating thickness values, different angles of incidence, different frequencies, and different roughness values. The results show that the roughness of the target surface in the terahertz band has a significant effect on the scattering.

Key words: Gaussian rough surface, roughness surface target, terahertz, physical optics