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Radar Cross Section Reduction of a Cavity in the Ground Plane

  • Gang Bao (a1) (a2) and Jun Lai (a2)

Abstract

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.

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Corresponding author

Corresponding author.Email:bao@math.msu.edu

References

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Radar Cross Section Reduction of a Cavity in the Ground Plane

  • Gang Bao (a1) (a2) and Jun Lai (a2)

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