Laird-Signal-Laird-Tech-21451204

Eccosorb® SF  

Thin, Flexible, Resonant Microwave Absorber  

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.  

FEATURES AND BENEFITS  

MARKETS  



High power performance  



Narrow band performance  



Low outgassing properties  



Commercial Telecom  



Security and Defense  



Automotive  

SPECIFICATIONS  

TYPICAL PROPERTIES  

Max service temperature °C (°F)  

Power Handling W/cm²  

Hardness (Shore A)  

ECCOSORB SF  

163 (325)  

0.2  

73  

Density Range

 

g/cm³  

Tensile Strength (MPa)  

Elongation at break %  

Tear Strength N/mm  

2.4-4.5  

1.0-6.0  

20 – 100  

0.2-2.0  

Data for design engineer guidance only. Observed performance varies in application.  

Engineers are reminded to test the material in application.  

APPLICATIONS  



Lining radar nacelles and the exterior of airframes particularly where high power is  

present.  



Lining of cavity backed and shrouded telecommunication antennas where narrowband  

performance is required.  



Lining metal surfaces of vehicles to reduce overall 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.  

USA: +1.866.928.8181  

Europe: +49.8031.24600  

Asia: +86.755.2714.1166  



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, ECCOSORB® MCS and ECCOSORB® BSR are recommended due to their high magnetic  

loss properties, broad band performance, as well as the availability of a wider range of  

thicknesses (0.010” to 0.100”).  

Eccosorb® SF  

Thin, Flexible, Resonant Microwave Absorber  

AVAILABILITY  



Standard sheets are 305 x 305mm (12”x12”)  



Thickness varies depending on resonant frequency desired. Thickness is indicative and is  

tuned to meet the reflectivity specifiction  



Other resonant frequencies up to 40 GHz can be supplied on special order  



The material can also be supplied in customized shapes and can be supplied with a  

pressure sensitive adhesive (PSA).  

INSTRUCTIONS FOR USE  



Eccosorb SF 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.  

Typical Reflectivity Performance  

USA: +1.866.928.8181  

Europe: +49.8031.24600  

Asia: +86.755.2714.1166  

The performance of ECCOSORB® SF is defined by reflectivity at a single frequency.

 

A generalized performance curve  

is shown above.

 

The design frequency f0, has a ±5% bandwidth, designated as

 

f1 and

 

f2. Although

 

performance  

degrades with increased incidence angle, at incident angles out to 45°, reflectivity of -16dB has been demonstrated.  

RFP-DS-SF 081815  

A

ny information furnished by Laird Technologies, Inc. and its agents is believed to be accurate and reliable. All specifications are subject to change without notice. Responsibility for the use and application of Laird Technologies materials rests with the  

end user. Laird Technologies makes no warranties as to the fitness, merchantability, suitability or non- infringement of any Laird Technologies materials or products for any specific or general uses. Laird Technologies shall not be liable for incidental or  

consequential damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies’ Terms and Conditions of sale in effect from time to time, a copy of which will be furnished upon request. © Copyright 2015 Laird  

Technologies, Inc. All Rights Reserved. Laird, Laird Technologies, the Laird Technologies Logo, and other marks are trademarks or registered trademarks of Laird Technologies, Inc. or an affiliate company thereof. Other product or service names may be  

the property of third parties. Nothing herein provides a license under any Laird Technologies or any third party intellectual property rights.  

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