SIEPEL ADM Wedge Absorber

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  • Matrix: polyurethane foam with 90% open cells
  • Impregnating agents: carbon, binder, fire retardant
  • Colours: black, white, blue, green, red (other colours on request)
  • Maximum service temperatures: - 65° C to 160° C
  • Power handling: 0.2 W/cm² max CW

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SIEPEL ADM Wedge Absorber

ADM is a range of absorbers consisting of blocks of carbon-impregnated polyurethane foam in wedge shape.

ADM absorbers are designed for microwave measurement facilities such as Compact Ranges and anechoic chambers designed for measuring antenna patterns or radar cross section. For angles of incidence above 50°, the wedged shape of the ADM guide the reflected wave.


Fire resistance: NRL 8093 (Test 1, 2, 3), ISO 11925-2, DIN 4102 (class B2).

Their raw materials are compliant to RoHS/REACH and free of substances in the current list of Substances of Very High Concern (SVHC) published by the European Chemicals Agency (ECHA).

Both aqueous and plastic paint coating were developed to enable work in ISO 4 (ISO14644-1 2015) clean room conditions.


ADM absorbers can be installed on all flat surfaces by Neoprene glue to be applied with a brush or a pneumatic spray gun to both faces to be glued.