TITLE:
Mitigation of Human Exposure to Electromagnetic Fields Using Carbon Foam and Carbon Nanotubes
AUTHORS:
Davide Micheli, Mario Marchetti
KEYWORDS:
Carbon Nanotube; Carbon Foam; Layered Materials; Radar Absorbing Material; Winning Particle Optimization; Human Exposure Mitigation
JOURNAL NAME:
Engineering,
Vol.4 No.12A,
December
31,
2012
ABSTRACT: In recent years there has been increasing concern about
the possible consequences on human health from exposure to RF fields produced
by wireless telecommunication technologies. In this work the coupling between
carbon foam and composite materials made of carbon nanotubes and epoxy-resin
allows to build a material able to absorb the electromagnetic field thus
reducing its intensity in the environment where the mitigation of
electromagnetic field is required. The Frequency range considered is 2 GHz - 3 GHz
which is the most common frequency band used in wireless network and microwave
oven too. Two different kind of heterogeneous materials are designed, one is a
layered radar absorbing material made exclusively of epoxy resin and carbon
nanotube in different weight percentage, the others are porous carbon foam
where the pores are supposed be filled with carbon nanotubes and epoxy-resin.
Both type of materials show interesting absorption properties reaching peak of
reflection coefficient between –15 dB and –45 dB for a normally incident plane
wave.