EeonTex(TM) Electrically Conductive Textiles for Microwave 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 examplesare illustrated below. Click over the images to enlarge
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
New formulations of EeonTex
static dissipative coatings are lightly colored