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

摘要

The present research shows a powerfulmethod for the design of multi-layered radarabsorbing materials useful in low observableand stealth manned or unmanned aircraftsystems. The imitation of a desired behavior ofthe reflection coefficient allows to modeling theoptimal arrangement of each layer in terms ofmaterial and thickness. A significantenhancement of the electromagnetic absorptionis obtained through the use of different kind ofcarbon nanomaterials uniformly dispersedwithin an epoxy matrix. Several carbon-basednanocomposite materials are dielectricallycharacterized in the frequency range 2-18 GHz,and an evolutionary algorithm is used to run themathematical model in order to find out theoptimal solution in terms of the multi-layercomposition. Interesting applications of theproposed design method are suggested othertypes of military targets in the marine andterrestrial scenario where the reduction of theradar observability is mandatory.