Abstract: This study presents an efficient method for calculating the gradient of the radar cross section (RCS) of coated aircraft. The method is based on adjoint theory and an improved formulation of ...

Abstract: Inverse design is an emerging theory in material, photonics, and other fields. The Adjoint Method (AM) is an efficient gradient-based optimization strategy commonly used in inverse design.

between forward and adjoint DFT fields, plus the restriction step that contracts the per-voxel sensitivity onto the design grid. The gradient formula (from the adjoint method) is: ...