A novel lightweight wideband radar absorbing material (RAM) for radio-frequency is developed using a rohacell (RC) panel coated with a film of carbon nanostructures. The coating is produced through the dispersion of either commercial graphene nanoplatelets (GNPs) or carbon nanofibers (CNFs) in 1-propanol and the deposition of the so-obtained colloidal suspension onto the RC surface with a bristle brush. Finally, a polymeric film is deposited over the carbon-based lossy layer in order to protect the lossy coating from the external environment. The electromagnetic properties of the produced panels are investigated through reflection coefficient measurements in the X and Ku bands. It is demonstrated that the RAM with the GNP-based lossy layer has a -10 dB bandwidth of ~7 GHz, but the polymeric top layer degrades its performances, resulting in a minimum reflection coefficient of -9 dB. With the CNF-based lossy layer it is possible to fabricate a RAM with a -10 dB bandwidth of ~10 GHz. The application of the protective layer reduces the bandwidth to ~6 GHz.

Wideband radar absorbing panels with lossy multilayer graphene and carbon nanofiber-based coating / Proietti, Alessandro; Rinaldi, Andrea; Tamburrano, Alessio; DE BELLIS, Giovanni; Sarto, Maria Sabrina. - 2016-(2016), pp. 239-244. ((Intervento presentato al convegno 2016 IEEE International Symposium on Electromagnetic Compatibility, EMC 2016 tenutosi a Ottawa, Canada nel 25-29 july 2016 [10.1109/ISEMC.2016.7571651].

Wideband radar absorbing panels with lossy multilayer graphene and carbon nanofiber-based coating

PROIETTI, ALESSANDRO;RINALDI, ANDREA;TAMBURRANO, Alessio;DE BELLIS, GIOVANNI;SARTO, Maria Sabrina
2016

Abstract

A novel lightweight wideband radar absorbing material (RAM) for radio-frequency is developed using a rohacell (RC) panel coated with a film of carbon nanostructures. The coating is produced through the dispersion of either commercial graphene nanoplatelets (GNPs) or carbon nanofibers (CNFs) in 1-propanol and the deposition of the so-obtained colloidal suspension onto the RC surface with a bristle brush. Finally, a polymeric film is deposited over the carbon-based lossy layer in order to protect the lossy coating from the external environment. The electromagnetic properties of the produced panels are investigated through reflection coefficient measurements in the X and Ku bands. It is demonstrated that the RAM with the GNP-based lossy layer has a -10 dB bandwidth of ~7 GHz, but the polymeric top layer degrades its performances, resulting in a minimum reflection coefficient of -9 dB. With the CNF-based lossy layer it is possible to fabricate a RAM with a -10 dB bandwidth of ~10 GHz. The application of the protective layer reduces the bandwidth to ~6 GHz.
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9781509014415
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/927630
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