Microwave absorber foam

Series

Specify the length in mm. Soft version: max. 1000 mm - Hard version: max. 555 mm
Specify the length in mm. Soft version: max. 1000 mm - Hard version: max. 355 mm

These absorbers can be used at higher frequencies than traditional shielding and can also be used with other EMI/RFI shields to extend frequency range.

The microwave absorbers can be installed easily with pressure-sensitive adhesive (PSA), often directly onto high-frequency board-level components, to absorb unwanted radiated and surface-wave EMI/RFI and to meet FCC requirements without shielding.is used as a microwave absorbing material, especially for applications with frequencies of 1 to 17 GHz. The product acts like a free-space resistor to incoming electromagnetic energy.

The Microwave absorber foam is available in a soft and a hard variant. The type you choose depends on the force you want the foam to be able to withstand, if necessary.

Microwave absorber products can solve EMI/RFI problems without additional shielding and enable advanced technologies including automotive radar, military, and commercial wireless applications.

Typical applications
  • Antenna hats
  • Test boxes
  • PCB shielding/housings
  • Military applications
  • EMI reduction
  • Antenna pattern shaping
  • Radar cross reduction.
Versions
  • A soft version which can be easily compressed to 75% is available as die cut or in the form of sheets. The soft microwave absorber sheets are available with thicknesses of 3, 6, and 15 mm and with or without PSA (pressure-sensitive adhesive). Max. sheet size 1000 x 1000 mm
  • A hard which can carry more weight and keeps its shape and position more easily is available with a thickness of 6 mm and 12 mm. Other thicknesses are available on request. Max. sheet size 555 x 355 mm
 

3500 series - Reflection loss

Please note: These values are measured under laboratory conditions. Results may vary in other situations; please read our Guarantee

Product specifications 3500 Soft
Material Dissipative (carbon-loaded) polyethylene
Colour Black
Cell Closed cells, rigid
Density 30 kg/m3
Usage temperature -70°C / +95°C
Tensile strength 300 kPa
Elongation at break 65%
Resistance to compression @ 25%: 40 kPa
@ 40%: 80 kPa
@ 50%: 120 kPa
@ 60%: 180 kPa
Shore Hardness 62 OO (ISO868 1985)
Electrical properties
Surface resistance < 109 Ω (IEC 61340-3-2)
Volume resistance < 108 Ω
Decay time From 1000V to 100V: < 2 seconds
Product specifications 3500 Hard
Material PU foam with conductive latex impregnation
Colour Black
Cell Open cells, flexible
Density 24 kg/m3
Usage temperature N.D.
Tensile strength 70 kPa
Loose after heating process: -30% (140°C, 16 hrs)
Loose after humidity process  -30% (105°C, 3hrs)
Elongation at break  100%
Resistance to compression @ 50%: 3 kPa
Hardness 120-140 N (BS4443 part 2 method 7 1988)
Class  A (BS3379 1991)
Electrical properties
Surface resistance < 105 Ω (IEC 61340-3-2)
Volume resistance < 105 Ω
Decay time From 1000V to 100V: < 2 seconds
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