Analytical $S$-Parameter Sensitivity Formula for the Shape Parameters of Dielectric Objects

An exact sensitivity expression is proposed for the computation of $S$-parameter derivatives with respect to the shape parameters of isotropic dielectric objects. While an exact expression has already been developed for the shape parameters of volumetric metallic objects, to our knowledge, the case of dielectric objects has only been treated with approximations. The proposed expression integrates the field solution on the surfaces of the …