Optimized design of multi-ingredient radar absorbing materials using genetic algorithms

A novel technique for optimized design of radar absorbing coatings(RAC) containing multi-ingredient microwave absorbers and adhesive agent using genetic algorithms is presented in this paper. The objective function involving the maximum bandwidth of more than a desired intensive-absorption virtually bears the advantages of both thin-thickness and lightweight of RAC by incorporating an idea that variable restrictions in both species and volume fraction of microwave absorber as well as thickness of coating layers are dynamically tracked into the genetic algorithms. Given a predefined set of available microwave absorbers with frequency-dependent electromagnetic parameters, densities and so on, the proposed technique simultaneously determines the optimal ingredients choice and respective fraction and thickness for each layer, which greatly simplifies preparation and fabrication for multi-ingredient radar absorbing materials.