Microwave absorbers based on foamed nanocomposites with graded concentration of carbon nanotubes

Author

Huynen, Isabelle ; Bednarz, L. ; Thomassin, J.-M. ; Pagnoulle, C. ; ôme, R. Jér ; Detrembleur, C.

Author_Institution

Microwave Lab., Univ. Catholique de Louvain, Louvain-la-Neuve

fYear

2008

fDate

27-31 Oct. 2008

Firstpage

5

Lastpage

8

Abstract

A multilayered foamed nanocomposite with graded concentration of carbon nanotubes is proposed as a novel microwave absorber. The dispersion and foaming process enables to control the gradation in conductivity of each layer. Absorption performances are demonstrated through measurements of reflectivity and shielding effectiveness over the frequency range [8-16 GHz]. An improvement of about 5 dB in reflectivity is observed with respect to a foamed composite having a similar uniform concentration, while in both cases the shielding effectiveness is kept higher than 15 dB.

Keywords

carbon nanotubes; electromagnetic wave absorption; microwave materials; microwave spectra; nanocomposites; reflectivity; C; carbon nanotubes; conductivity; microwave absorbers; nanocomposites; reflectivity; shielding effectiveness; Carbon nanotubes; Conductivity; Electromagnetic interference; Electromagnetic radiation; Electromagnetic wave absorption; Instruments; Nanocomposites; Radar antennas; Radio frequency; Reflectivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008. EuMC 2008. 38th European

Conference_Location

Amsterdam

Print_ISBN

978-2-87487-006-4

Type

conf

DOI

10.1109/EUMC.2008.4751372

Filename

4751372