EA-CR125-24

EMI MICROWAVE ABSORBERS EAMICROWAVE ABSORBER - EMI/RF ABSORBER - RAM - FLEXIBLE FERRITE Leader Techs absorbing products are utilized to attenuate microwave energy from 500 MHz to 80 GHz. The unwanted electromagnetic energy is converted into a miniscule amount of heat. Absorbers are composed of either iron-infused silicone or carbon-coated polyurethane foam. Greatest performance is achieved when absorber thickness is comparable to a quarter of the wavelength of the offending frequency. ABSORBER COMPARISON CHART Cavity Parameters Tuned Low Profile Lossy Reticulated Pyramidal Resonance Binder Silicone Silicone Silicone Polyurethane Foam Polyurethane Foam Polyurethane Foam Filler Iron Iron Iron Carbon Carbon Carbon Moisture Resistant Yes Yes Yes No No No Attenuation Level Excellent Very Good Fair Good Good Good Design Flexibility Very Good Very Good Excellent Good Fair Fair Standard Format Sheet Sheet Roll Sheet Sheet Sheet Die/Kiss Cut Option Yes Yes Yes Yes Yes No Cost Lead Time Very Good Excellent Excellent Excellent Excellent Excellent FORMAT OPTIONS: SHEET - DIE CUT - KISS CUT Fundamentals Howdofoambasedabsorberswork Lossy Foam Reticulated EnergySource Pyramidal Absorbing foamwith resistive carbonacts likearesistor. Resistivecarbon suspendedbya foammatrix. Transmittedenergyhas beenreducedby99% Fundamentals Cavity Resonances (Spurious Harmonics, Noise Spurs, Cavity Oscillaons) Before After Narrowband Wideband Cavity Resonance Cavity Resonance Absorber Totally enclosed by metallic conductors, have a physical size that can cause them Absorber will change the Q of the to resonate at a discrete frequency or cavity disrupng the energy and mulple frequencies. dampening the resonance