Radar cross-section enhancement of concrete specimen with trihedral corner reflector structure buried

Low electromagnetic fields backscattering from concrete pavement as its smooth surface results the much darker image feature when exposures to imaging radar when compared with rough surface such as vegetation. In this paper, exploratory research on radar cross-section enhancement of concrete specimens with trihedral corner reflectors structure buried is presented. Scattering properties of concrete specimen, corner reflector and concrete specimen mixed with corner reflectors are numerical simulation based on the model of finite difference-time domain(FD-TD) in lossy dielectric with perfect matched layer(PML) in z-direction and period boundary conditions(PBC) in x, y-direction. In the conditions of given incident wave and dielectric coefficient of concrete specimen, the monostatic RCS of concrete specimen mixed trihedral corner reflectors with 5 times of wavelength is 3.6 dBsm, the average is -9.8 dBsm in direction of 30-60 degree.