Terahertz-wave Scattering by Perfectly Electrical Conducting Objects

Abstract

The prediction of radar cross section (RCS) to perfectly electrical conducting (PEC) objects in the Terahertz band has been discussed in this paper. Since the integral equation solvers cannot offer the ability to compute RCS in such high frequencies, the physical optics (PO) method has been applied. Through properly manipulating to the double integration appeared in PO, the exact integration of polygon surfaces could be obtained with independence of frequencies, which is vital for the RCS prediction in the Terahertz band. The discretization control length has been discussed with a simple formula, which is valuable in most spectral ranges for the PO method. Simulation results show that the RCS prediction for PEC objects using the PO method in the Terahertz band is possible through proper discretization.