ECCOSORB^® SF is a series of thin, Refers to the medium of air (or vacuum) in which radio waves may travel. This is in contrast to waves traveling on transmission lines such as coax or waveguide, or through a medium, such as an Free Space Absorber (Specular Absorber)free space, resonant absorbers that are available in the 1 GHz to 18 GHz range. These magnetically loaded narrowbanded absorbers reflect 1% or less of normally incident energy (at least 20 dB down) at design frequencies in the range of 2 to 18 GHz when intimately backed to a metal surface. At frequencies in the range of 1 to 2 GHz, reflectivity at the resonant frequency is slightly less than -20 The portion of incident energy which is reflected from a surface. A flat metal surface reflects all incident radiation. Measured in dB which is a logarithmic measure of the portion of energy reflected as compared to that reflected from a flat metal plate of the same area. A metal plate has a reflectivity of 0 dB down. A material which reflects half of the incident energy is 3 dB down or has a reflectivity of -3 dB. A material which reflects one tenth of the incident energy has a reflectivity of -10 dB Reflectivity (%) dB down. For flat sheet absorbers, 20 dB down is generally the best possible and desired performance.dB down.  These absorbers are also available on special order for other frequencies above 18 GHz.    

ECCOSORB^® SF is ideally suited to applications where a thinner material is essential and broadband performance is not required.  In order to function properly, ECCOSORB^® SF should be intimately backed to a metal surface.  If required an integral reflective backing (ML) can be provided as well as a Pressure Sensitive Adhesive (PSA) for easy attachment.

Applications include lining radar nacelles (particularly where high power is present), lining of cavity backed and shrouded telecommunication antennas, lining metal surfaces to attenuate surface currents, and for lining magnetron housings to prevent detuning.