Multi-objective optimization design of the multilayered planar shield

The shielding effectiveness of multilayered planar shield is the strong non-linear function of incident angle, conductivity, magnetic permeability, the dielectric constant and the thickness of every layer. Design of the multilayered composite materials is to solve the equations made of these functions. It's very difficult to solve the problem by numeric methods. The multi-objective optimization model was presented to solve the problem of the electromagnetic design. The total weight, cost and thickness are the optimization objects and the shielding effectivenesses (SE) in some frequencies are the constrained conditions in the model. And the genetic algorithm was used to design the multilayered composite material by the existent multilayered planar composite electromagnetic shielding material model. By making use of this method, the different shielding materials and the corresponding thickness of every layer can be designed for given shielding effectiveness (SE) in some frequencies, different incident angles. Finally the method was simulated, the results demonstrate the validity of the method.