Single- and Multi-layer Microwave Absorbing Material Based on Conducting Polyaniline and Polyurethane Polymers for Operation in the X-band

Abstract

Microwave absorbing materials (RAMs) were produced in the form of single- and multi-layer lightweight thin flexible sheets containing the conducting polymer polyaniline dispersed in a polyurethane matrix. The sheets consisted of 1 to 4 layers of absorbing materials, each having the same electromagnetic properties. Bulk electromagnetic properties of these RAMs were analyzed using the waveguide technique in the frequency range of 8 to 12 GHz (X-Band). The multi-layer RAMs exhibited behavior of narrowband absorbers in the frequency range studied. The use of layers changed the bulk properties of the RAMs without changing their intrinsic electromagnetic properties.