EeonTex(TM) Electrically Conductive Textiles for Radar Absorption

EeonTex(TM) fabrics, EeonFoams(TM), and EeonFelts(TM) represent a broad spectrum of unique, conductive materials that can be used for radar and microwave absorption in a variety of configurations and applications. Because they can be treated to any resistivity between 10 ohm/sq and 100,000 ohm/sq, EeonTex fabrics are readily employed to produce Salisbury screens and broadband Jaumann absorbers. Some examples are given below. EeonTex glass fabrics are ideally suited for radar absorbing composite structures. They are used to make low radar cross section (RCS) antennas for the Navy, and they could easily be incorporated into wind turbine blades and towers to reduce their problematic radar signatures. Fabrics having resistance gradients and patterns can be made to order.

EeonFoams are polyurethane foams treated with carbonaceous material. Custom gradients through the thickness or along the surfaces are possible. Foam thicknesses up to 2" are common. A graph of reflection loss, which is a good indicator of absorption, of a 1", graded foam is shown. Similarly, EeonFelts are polyester felts treated with similar conductive formulations. Tailored gradients through the thickness or along the surface again are available. The advantages of felt over foam are 1) flexibility, 2) sheets much longer than the typical 2' length are available, and 3) felt does not emit cyanide gas if burned. The insertion loss of a 1" thick, 100 ohm EeonFelt having a self-contained 10 ohm/sq backplane is shown. Clearly, at the higher frequencies, most of the insertion loss if due to absorption.
EeonTex conductive fabrics are used in a large variety of applications related mostly to microwave and radar absorption, sensors, resistive heating, static dissipation, EMI suppression, and medical electrodes. Specific examples are illustrated below.

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Examples of 10 GHz Salisbury screens made using EeonTex fabrics. The
position and depth of the loss peak will vary slightly depending on the surface resistivity and thickness of the fabric. EeonTex conductive fabric is used in Salisbury screen configurations in ground penetrating radars
Multiple layers of EeonTex fabrics are used to make a highly effective
broadband Jaumann absorber.
The transmission/insertion loss of EeonTex fabrics is readily controlled by
their surface resistivities. Depending on the fabric construction, the electrical properties can have a strong or negligible orientation effect.
EeonTex fabrics, especially the glass and quartz versions, are often used
in composites. The conductive coating does not adversely affect the mechanicals of composites compared to those of untreated glass fabrics.
EeonTex fabrics have very good environmental stability, especially
when coated.
New formulations of EeonTex static dissipative coatings are lightly colored
and hold up well to heat and outdoor weathering

Electrically Conductive Textiles - Conductive Fabrics - Conductive Foams - EMI / RFI / EMC / ESD Conductive Textiles