RAM Materials and Structures Manufactured Using Additive Techniques for Military Applications

Abstract. This paper reviews contemporary radar-absorbing materials (RAM) exhibiting strong microwave attenuation. It discusses fundamental dissipation mechanisms, impedance matching principles and major RAM classes, including carbon composites, ferrites, conductive polymers and metamaterials. The experimental section examines polylactide (PLA) reinforced with flake graphene for fused-filament fabrication, evaluating its microwave absorption efficiency and shielding effectiveness as a structural material for additively manufactured electronic enclosures.