Additively manufactured metastructure design for broadband radar absorption

Abstract Background Recent advances in material science and electronics led to the rapid development of communication devices radar detection techniques resulting an ever-increasing demand for improved stealth performance air vehicles during scouts. Absorber design employing metastructure concept has recently become a popular approach improving performance. Metastructure permits realization desired absorption characteristics by careful geometrical structures compositions. In this study, designed based on graphite SLS composite been demonstrated. The unit cell proposed structure is simulated COMSOL Multiphysics determine frequency-dependent characteristic structure. It fabricated using low-cost selective laser sintering technique additive manufacturing technology. Results prototype, while measured, shows effective bandwidth 1.04 GHz that reasonable agreement with response 2.08 GHz. optimized exhibits ? ? 10 dB reflectivity within broad frequency range extending from 7.60 18.00 under normal incidence both TE TM polarizations. Furthermore, different polarizations incident angles investigated. indicate absorber displays polarization indifference wide-angle tolerance up 45° 30° Conclusion paper, feasibility 3D print absorbing established as confirmed simulation measurement results. advantages low cost, ultra-broad operating band, feature, insensitivity qualifies electromagnetic shielding applications.