SHIELDING PROPERTIES OF THE CELLULAR STRUCTURES WITH CARBON-CONTAINING MATERIALS AND FOILED FOAM POLYETHYLENE

Abstract

The method to produce electromagnetic radiation shields using a non-woven needle-punched fabric containing carbon additives and foamed polyethylene coated with aluminum foil is proposed. To increase the reflection and absorption coefficients, it is proposed to create a cellular structure containing fragments of both types of materials with length from 20 to 40 mm and width from 5 to 8 mm. The measurement of the shielding characteristics was carried out on the automated meter of the transmission and reflection coefficient SNA 0.01–18 in the frequency range 0.7…17.0 GHz. It is shown that the values of the reflection coefficients in the frequency range 0.7…17.0 GHz were –0.5…–4.5 dB and the values of the transmission coefficient of electromagnetic radiation were –4.0…–25.0 dB.

Keywords

• electromagnetic radiation
• shielding
• needle-punched fabric
• carbon additive
• foamed polyethylene
• shielding characteristic