Optimum Design of Flexible Microwave Absorption Fabrics

Abstract

In order to develop flexible absorption fabric and study the effects of specifications on absorption properties, two-layer laminated fabrics were designed according to thickness matching and impedance matching. Stainless steel core-spun yarn fabrics were used as first layer which easily realized matching to the free space, Ni-Fe fiber consisted of second layer because its strong dielectric loss and magnetic loss. The reflectivity of fabrics were measured by the means of "arch testing method" in the range from 2~18 GHz. The results showed that the reflectivities of laminated fabrics can below-20 dB and the bandwidth <-10dB can reach 3.88 GHz with the change of fabric specifications.

Microwave Absorption and Electrical Properties of Coated Polyester Fabric with Cobalt Ferrite and Polyaniline

“…Therefore, in order to protect the body from harm of these EM wave, the design and exploration of EM wave absorption fabric have attracted a great deal of interest which desired to effectively attenuate EM energy by dissipating them through interference and converting them into thermal energy [4][5][6]. As a result, several kinds of EM wave absorption fabrics have already been prepared by coating magnetic materials [7] as well as intrinsically conducting polymers (ICP) such as polypyrrole (PPY) [8] and polyaniline (PANI) [9].…”