SYNTHESYS OF RADAR ABSORBING MATERIALS FOR STEALTH AIRCRAFT BY USING NANOMATERIALS AND EVOLUTIONARY COMPUTATION

摘要

The present research shows a powerful method for the design of multi-layered radar absorbing materials useful in low observable and stealth manned or unmanned aircraft systems. The imitation of a desired behavior of the reflection coefficient allows to modeling the optimal arrangement of each layer in terms of material and thickness. A significant enhancement of the electromagnetic absorption is obtained through the use of different kind of carbon nanomaterials uniformly dispersed within an epoxy matrix. Several carbon-based nanocomposite materials are dielectrically characterized in the frequency range 2-18 GHz, and an evolutionary algorithm is used to run the mathematical model in order to find out the optimal solution in terms of the multi-layer composition. Interesting applications of the proposed design method are suggested other types of military targets in the marine and terrestrial scenario where the reduction of the radar observability is mandatory.