When you need to absorb microwaves
These are samples of material from Wavexorb which, depending on the electromagnetic properties, can either serve as an absorber or a reflector of electromagnetic radiation. The dielectric and magnetic losses and their dependence on frequency results in the absorption and/or scattering of electromagnetic waves. For example, a good absorber material might have numerically equal values of complex permeability and permittivity (for an impedance match with air) and high loss tangents (for rapid attenuation) over a wide frequency range. There are a variety of materials, but most use either a carbon-loaded silicone (left) or foam (center) material. Narrowband absorbers, also known as tuned frequency or resonant frequency absorbers, are generally a layer of silicone that resonates at a specified frequency. They absorb microwave energy that is ± 10% of the resonant frequency which is generally between 2 and 18 GHz. The other sample is a polyether reticulated foam loaded with carbon. It is used for absorbing a broad band of frequencies.
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