A radar wave camouflage structure is disclosed. The radar wave camouflage structure comprises a substrate; a first layer on the substrate, comprising a first polymer matrix; magnetic nanoparticles dispersed in the first polymer matrix, wherein the magnetic nanoparticles comprise a mixture of Fe.sub.3O.sub.4, Fe.sub.3O.sub.4-4C carbide, Fe.sub.3O.sub.4--Ni composite and Fe.sub.2O.sub.3; a second layer on the first layer, comprising a second polymer matrix; and carbon black dispersed in the second polymer matrix.