Analysis of EM shielding effectiveness of CNT films based on TEM cell electric and magnetic coupling fields

Abstract

In this paper, we evaluated the electromagnetic (EM) shielding effectiveness (SE) of various carbon nanotubes (CNTs)-based films which were prepared with deposited carbon densities and thicknesses of the CNTs. The test environment based on a transverse electromagnetic (TEM) cell was adapted for (1) a comparison of the standard American society for testing and materials (ASTM) test and the near-field test using electric and magnetic field probes and (2) the differences of CNT SE on the electric field and magnetic field according to near end or far-end tests by the rotations of a microstrip patch antenna as a DUT. In addition, (3) the effect of CNTs composites and their thickness on the SE is investigated with TEM cell electric and magnetic field coupling to the DUT.