Free-space microwave characteristics of polypyrrole coated glass fibre

A series of polypyrrole coated glass fibre fabrics having different sheet resistivities has been chemically prepared from aqueous solution. The free-space microwave reflective properties of these materials has been measured, and their electrical characteristics described by a parallel RC network. The effects of rotation and fabrication into an epoxy resin matrix on the microwave reflective properties of polypyrrole coated glass fibre fabric have been measured. Polypyrrole coated glass fibre fabrics have also been used to construct a Salisbury screen absorber, and showed promising characteristics for their possible use as radar absorbing materials.