Three-Dimensional Aerodynamic/Stealth Optimization Based on Adjoint Sensitivity Analysis for Scattering Problem

A radar cross section (RCS) gradient calculation approach based on the discrete adjoint equation of Maxwell integral equation is proposed. The adjoint method can obtain the gradients of all design variables by a single solution of the scattering problem if electric field integral equation is adopted, and by one solution of the scattering problem and one adjoint problem if magnetic field integral equation or combined field integral equation is...