Pyramidal RF Foam Absorber 300mm
Pyramidal RF Anechoic Chamber material 30cm
Pyramidal EMC Foam absorber 30cm
Rubbersheet Microwave Absorber 300mm

Broadband Pyramidal Microwave Foam Absorber

DMC offers premium quality high performance Polyurethane (PU) Pyramidal Broadband Microwave Foam absorber made of carbon impregnated low density Polyurethane foam and comes in various size and color. Our PY-MI series absorbers provide excellent performance in normal incidence and off angle incidence with high power handling in order to provide optimal performance and support wide frequency bands of operation up to 110 GHz.
Pyramidal Broadband Microwave Foam Absorber Features:

  • Frequency range 80MHz to 110GHz
  • Typical reflectivity as high as -50dB
  • Power handling capacity 1.5kW/m2,540 V/m CW Radiated field strength
  • Fire Retardant per NRL-8093 1,2,3, UL 94 and DIN 4102-B2
  • Continuous working temperature up-to 90°C
  • RoHS Compliant
  • Zero Carbon dust

Part number reference:

DMC-PU-PY-MI-50, DMC-PU-PY-MI-100, DMC-PU-PY-MI-200, DMC-PU-PY-MI-300, DMC-PU-PY-MI-500, DMC-PU-PY-MI-700, DMC-PU-PY-MI-1000

Datasheet
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TYPICAL REFLECTIVITY AT NORMAL INCIDENCE OVER FREQUENCY RANGE IN dB

Model Number 30 MHz 80 MHz 300 MHz 500 MHz 1   GHz 3   GHz 6   GHz 10 GHz 18 GHz 40 GHz 110 GHz
DMC-PU-PY-MI-50 30 35 40 50 45
DMC-PU-PY-MI-100 30 35 40 45 50 45
DMC-PU-PY-MI-200 27 35 40 45 50 50 48
DMC-PU-PY-MI-300 25 35 40 50 50 50 50 47
DMC-PU-PY-MI-500 20 30 40 45 50 50 50 50 48
DMC-PU-PY-MI-700 8 25 35 40 50 50 50 50 50 48
DMC-PU-PY-MI-1000 11 30 40 45 50 50 50 50 50 47
DMC-PU-PY-MI-1200 5 13 35 40 45 50 50 50 50 50 47

DMC-PU-PY-MI-300

Pyramidal RF Foam Absorber 300mm

DMC-PU-PY-MI-500

Pyramidal RF Foam Absorber 500mm

DMC-PU-PY-MI-700

Pyramidal RF Microwave Anechoic Absorber 700mm

Frequently Asked Questions

What is a pyramidal microwave absorber?

A pyramidal microwave absorber is a carbon-loaded polyurethane foam material designed to absorb RF and microwave energy. It is commonly used inside anechoic chambers to reduce reflections and improve measurement accuracy.

Why are pyramidal absorbers used in anechoic chambers?

They absorb electromagnetic waves and prevent reflections inside the chamber. This creates a controlled environment required for accurate antenna and EMC testing.

What frequency range do pyramidal microwave absorbers support?

Typical pyramidal microwave absorbers support a very wide frequency range from tens of MHz to over 100 GHz depending on the absorber design and height.

What material is used in pyramidal RF absorbers?

Most pyramidal absorbers are made from carbon-impregnated polyurethane foam. This material converts electromagnetic energy into heat and reduces RF reflections.

What industries use pyramidal microwave absorbers?

Industries such as aerospace, defense, telecommunications, automotive, and research laboratories commonly use them for RF and EMC testing.

How do pyramidal absorbers reduce RF reflections?

The pyramid shape provides a gradual impedance transition that allows RF waves to enter the absorber and dissipate as heat. This minimizes reflection back into the chamber.

What are the typical applications of pyramidal microwave absorbers?

They are used in anechoic chambers for antenna measurements, EMC testing, radar cross-section testing, and wireless device validation.

Are pyramidal microwave absorbers fire-retardant?

Yes, many high-quality absorbers are manufactured with fire-retardant materials and comply with standards such as UL94 or NRL-8093.

What reflectivity performance can pyramidal absorbers achieve?

High-performance absorbers can achieve reflectivity levels as low as −50 dB depending on frequency and absorber height.

Why choose DMCRF pyramidal microwave absorbers?

DMCRF absorbers provide broadband RF absorption, high power handling, and reliable performance for EMC and antenna testing chambers. They are designed to deliver accurate RF measurement environments.

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