Second Order Transition Boundary Condition for not Dense Thin Sheets Analysis with MoM

Impedance boundary conditions allow one to replace a complex structure with an appropriate impedance relationship between the electric and magnetic fields on the surface of the object. The interest in this topic has arisen many years ago to study the electromagnetic scattering from complex objects and continues since there are numerous electromagnetic applications in which it is necessary to analyze structures composed of dielectric sheets with small thicknesses in terms of wavelength.