Design of a Lightweight Multilayered Composite for DC to 20 GHz Electromagnetic Shielding

The work aims to design a trilayer composite dedicated to electromagnetic shielding over a large frequency range, from 1 Hz to 20 GHz. Analytical and numerical models are used to determine the shielding effectiveness (SE) of this composite in the case of a planar shield. The shield is constituted of a support layer, a magnetic layer, and a conductive layer. Two possible designs are considered. To simplify the numerical calculation, a homogenization method and the Artificial Material Single Layer (AMSL) method are used. The proposed composite shows a good shielding capacity over the whole studied frequency range, with shielding effectiveness higher than 17 dB and 75 dB, respectively, in the near-field (1 Hz-1 MHz) and far-field (1 MHz-20 GHz). Both homogenization and AMSL methods show good suitability in near-field and allow one to greatly reduce the calculation time.

Automated summary

The research aimed to design a trilayer composite for electromagnetic shielding, showing good shielding effectiveness over a wide frequency range from 1 Hz to 20 GHz. Analytical and numerical models were used to determine the shielding effectiveness, with the use of homogenization and AMSL methods to simplify numerical calculations. The proposed composite demonstrated high shielding capacity in both near-field and far-field, with shielding effectiveness exceeding 17 dB and 75 dB, respectively.