ELECTROMAGNETIC SCATTERING FROM CONDUCTING BODIES OF REVOLUTION COATED WITH THIN MAGNETIC-MATERIALS

Coating of the conducting objects with thin layers of magnetic materia ls is used to reduce, significantly, the back wattering from axi-symme tric objects. The concept of the impedance boundary condition (IBC) is used to solve the problem. The present formulation predicts an accura te value of surface impedance from the equivalent volume magnetic curr ent of the magnetic material layer. The IBC concept is used to predict the coating material permeability and thickness in order to reduce th e backscattering radar cross section (RCS). The numerical solution is verified by comparison with numerical solutions based on the exact bou ndary conditions.