TY - JOUR
T1 - Radar Cross Section Reduction of a Cavity in the Ground Plane
JO - Communications in Computational Physics
VL - 4
SP - 895
EP - 910
PY - 2014
DA - 2014/04
SN - 15
DO - http://doi.org/10.4208/cicp.090413.130913s
UR - https://global-sci.org/intro/article_detail/cicp/7119.html
KW - 
AB - <p style="text-align: justify;">This paper investigates the reduction of backscatter radar cross section (RCS)
for a rectangular cavity embedded in the ground plane. The bottom of the cavity is
coated by a thin, multilayered radar absorbing material (RAM) with possibly different
permittivities. The objective is to minimize the backscatter RCS by the incidence
of a plane wave over a single or a set of incident angles. By formulating the scattering
problem as a Helmholtz equation with artificial boundary condition, the gradient
with respect to the material permittivities is determined efficiently by the adjoint state
method, which is integrated into a nonlinear optimization scheme. Numerical example
shows the RCS may be significantly reduced.</p>