RF Absorbing Materials
Pyramidal Foam
Pyramidal Foam absorber can be utilised for the frequency range 100MHz to 40GHz. The factor determining the lowest useable frequency is the physical size of the foam pyramid. The larger the dimensions of the pyramid, the lower the frequency of operation. Due to the volume consumed within an anechoic enclosure when using large pyramidal foam.
Ferrite Tiles are often overlaid with smaller Pyramidal Foam absorber to extend the anechoic performance down to 30MHz without losing valuable space.
Polyurethane foam loaded with carbon (and fire retardant) can be supplied in various dimensions.
Ferrite Tiles
Ferrite tilesoffer excellentabsorbing performance, environmentally resistant qualities, high strengthand good thermal resistance. They are widely used in anechoicchambers for electro-magnetic compatibility(EMC) testing and in various applications for suppressing electromagnetic interference (EMI).
Ferrite tile absorbers are useful over the frequency range 30 MHz to 1 GHz however the performance deteriorates quickly above 1 GHz.
Ferrite tiles can be supplied individually (measuring 100 mm square and 6.7 mm thick) or pre-glued onto 600 mm square MDF panels.
