Descripción

Eccosorb® SF

RESONANT MICROWAVE ABSORBER

Eccosorb SF is a narrow banded, magnetically loaded resonant absorber sheet for free-space applications. These silicone rubber sheets are designed to be bonded to flat or curved metallic surfaces to reduce the reflectivity in a narrow band of frequencies. Eccosorb SF reflects -20 dB or less of normally incident microwave energy at the design frequency in the range of 1 to 26 GHz.

Specific product Characteristics

Features&Benefits
High power performance Narrow band performance Low outgassing properties
Markets
Commercial Telecom Security and Defense Automotive
Typical application
Lining radar nacelles and the exterior of airframes particularly where high power is present. Lining of cavity backed and shrouded telecommunication antennas where narrow band performance is required. Lining metal surfaces of vehicles to reduce over all radar signature. Attaching to masts of ships, walls, etc to reduce reflections and echoes from nearby antennas. Lining magnetron housings to prevent detuning. Fabricating into tapered shapes for impedance matching in waveguide or microstrip applications. Lining metal surfaces to attenuate surface currents, suppressing reflections inside microwave modules, and dampening cavity resonances in microwave modules. For module interference, cavity resonance and surface current problems, ECCOSORB® GDS-U, ECCOSORB® MCS-U and ECCOSORB® BSR-U are recommended due to their high magnetic loss properties, broadband performance, as well as the availability of a wider range of thicknesses (0.010” to 0.100”)
Availability
Standard sheets are 305 x 305 mm (12”x12”) Thickness varies depending on resonant frequency desired. Other resonant frequencies can be supplied on special order. The material can also be supplied in customized shapes. It can be supplied with a pressure sensitive adhesive (PSA).
Instructions for use
Eccosorb SF-U is designed to function directly in front of a metallic surface. If this is not the case, a metallic foil should first be bonded to the object. For optimum performance, material is recommended and can be supplied with a metal backing (-ML) To obtain a strong bond of the absorber to the object, clean the surface with a degreasing solvent, apply a thin coat of primer to the dried surface and apply an RTV silicone adhesive. Eccosorb SF can be readily cut with a sharp knife and template. It is a very flexible material and will conform to mild curvatures.
Related products
For corrosive environments, see Eccosorb® DSF For better abrasion resistance, see Eccosorb® SF-U

Product properties

Properties	ECCOSORB SF
Max service temperature °C (°F)	163 (325)
Power Handling W/cm²	0.2
Hardness (Shore A)	73
Density Range g/cm³	2.4-4.5
Tensile Strength MPa	1.0-6.0
Elongation at break %	20 – 100
Tear Strength N/mm	0.2-2.0

Data for design engineer guidance only. Observed performance varies in application.
Engineers are reminded to test the material in application.

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