RF Absorbers

RF Absorbers for Different Applications

The two common uses for RF Absorbers, are:

  • Attenuation absorbers – enhance attenuation performance, absorbing noise signals from outside the box and / or the transmission of the device signals out of the shielded space.
  • Reflection Absorbers – absorb the reflection of signal energy inside the shielded space in order to prevent the interferences caused by reflected signals. 

RF-absorbers have multifunctional applications.

The type of absorber is matched with the specific range of applications, testing and measurement setups and the DUT (Device Under Testing), while considering the frequencies’ range, attenuation levels, expected sounds and more.

A full technical specification can be found on each RF-absorber datasheet.

The performance of each absorber is determined by its shape and size, the materials it is made of and its chemical composition.
Special applications require special absorbers. For example: Aabsorber Honeycomb for ventilation windows; rubber and magnetic-type ferrite absorbers for floors/sidewalk in shielding chambers.

If you need any help in designing your shielding space don’t hesitate to contact our experts…

Reflection Absorbers

The main use of pyramid absorbers is to avoid reflections of signals that bounce off walls, or other reflective elements from within the shielded space (such as the test devices and more).
This type absorbs reflected signals from within the shielded chamber, thereby preventing interferences  caused by reflected waves and collateral sounds.

Our solutions uses a variety of reflection absorbers, in various shapes (pyramid/ flat/others), and technical specifications according to the design requirements.

Semi-anechoic or fully-anechoic chambers can be supplied, as they integrate various types of reflection absorbers.

The guiding principle for the height of the pyramid is as follows: “The lower the frequency the higher the pyramid” For example, see below common absorbers specs:

18 up to 40 GHz 10 GHz 3 GHz 1 GHz 500 MHz 250 MHz high of absorber pyramid (inches)
-50dB -50dB -50dB -40dB -35dB -20dB 24″
-50dB -50dB -45dB -40dB -30dB   18″
-50dB -50dB -40dB -35dB     12″
-50dB -50dB -40dB -30dB     8″
-50dB -40dB -25dB       4″

Attenuation Absorbers

The main use of Attenuation Absorbers is to prevent noise signals to/from the shielded boxes, ensuring reliable testing and measurements, as well as preventing the transmission of signals from the device from within the box without disrupting the environment around it.

Attenuation absorbers will normally appear flat-shaped. Signals insertion loss level can range from -15dB on low frequencies (<1 GHz) and reach -35dB on higher frequencies (>18 GHz). The insertion loss level (attenuation level) is determined by the type of material (such as Carbon) and its thickness.

Our team of experts can help you select the right type of absorbers, material, shape, size and more.

Contact with IGOS-MN for any type of-

RF Absorbers

Shielding-Boxes for a Wide Range of Frequencies

IGOS-MN range of products covers a vast array of applications, frequencies and attenuation levels.

Custom-made shielding boxes

IGOS-MN provides customized shielding boxes. We manufacture according to the required specifications.