Thin and flexible multilayer polymer composite structures for effective control of microwave electromagnetic absorption

Study of Absorption in Carbon Nanotube Composites from 1HZ to 40GHZ

“…CNT. These results are in the same range of values than some measured in [3], around 30% or 60% absorption in case of CNT gradient loading in PC compounds to control absorption in slab with 2mm thickness.…”

“…In this paper we perform a thorough study of the absorption performances of nanocomposites polymer slabs including carbon nanotubes [2][3]. Compared to the state-of-the-art, it involves both low and high frequencies for the same composites, which is rather unique to our best knowledge.…”

“…Usually radar absorbing materials are made of thick foam designed for wideband absorption. Alternatively, thin multilayered coatings can be used but with operation usually restricted to a narrow frequency band, except for carbon nanotube (CNT) nanocomposites [2][3]. Another approach consists in Frequency-Selective Surfaces (FSS) that enable to achieve nearly perfect absorption, however in a narrow frequency band since planar resonators are used to achieve absorption at resonance [4][5].…”

Parametric Study of Microwave Absorption in Lossy Dielectric Slabs

“…In this paper we perform a thorough study of the absorption performances of conductive slabs applicable for example to nanocomposite polymer slabs including carbon nanotubes [2][3][4]. The influence of electrical parameters of the slab, of its-thickness and of the frequency is investigated and explained.…”

“…Usually radar absorbing materials are made of thick foam designed for wideband absorption. []Alternatively, thin multilayered coatings can be used but with operation on a narrow frequency band, except when carbon nanotube nanocomposites are considered [2][3][4] .Another approach consists in Frequency-Selective Surfaces (FSS) that enable to achieve nearly perfect absorption, however in a narrow frequency band since planar resonators are used to achieve absorption at resonance [5][6].A further development combines FFS structures with nanocomposite lossy slabs [7].…”