Microwave absorbers

Our wide range of electromagnetic absorbers for microwave testing

We have developed a whole range of absorbers tailored to the tests to be carried out:

• Antenna measurements (radiation pattern, VSWR, PIM)
• RF systems verification (satellites, WiFi, mobile phones, 5G …)
• Radar characterization or Radar Cross Section (RCS)

All the following models are used in new installations or for chamber refurbishment and upgrades. Depending on your needs, our expertise allows us to offer you the right absorbers for a specific chamber design, instrumentation and / or installation

SEA-PM – Broadband pyramidal absorbers

Pyramidal absorbers used for the lining of anechoic chambers for antenna measurements (compact ranges, Radar Cross Section (RCS), Over-The-Air (OTA), IoT, 5G …)

• Frequency range: from 80 MHz to 110 GHz.
• Maximum power handling: 2 kW/m²
• Maximum temperature: + 160°C – 320°F
• Dimensions:
  • Height: from a few centimetres to more than 1 metre – from 1.1” to 43.3”
  • Base size: 610×610 or 305×305 mm – 24”x24” or 12”x12”
  • Custom-made possible
• Indoor use
• Laying: linearly or diamond; glued or on Velcro®

Our assets:

• SEA-PM offers you excellent physical properties
• LIV-coating available: offers brightness, flexibility, and a wide choice of colours
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks
• Chamber design & overall chamber performance calculation

Range of sizes and performances depending on the need and the space available.

SEA-MP – Mid-power absorbers

Absorbers designed to handle high power up to 3.2 kW/m². They equip the specific areas of compact bases and antenna measurement chambers dedicated to telecommunications/wireless, satellite, defence,..

• Frequency range: from 80 MHz to 40 GHz.
• Maximum power handling: 3.2 kW/m²
• Maximum temperature: + 160°C – 320°F
• Dimensions:
  • 2 heights available: 470 and 660 mm – 18.50’’ and 26’’
  • Base size : 610×610 mm – 24’’x24’’
• Indoor use
• Laying: glued to any flat surface or on Velcro®

Our assets:

• 25-year warranty on RF performance of absorbers
• New product developed by Siepel
• Ideal model for intermediate high field areas and still affordable
• LIV-blue coating available: offers brightness, flexibility, and a wide choice of colours
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks
• Chamber design & overall chamber performance calculation

SEA-HP – High-power absorbers

These honeycomb absorbers can handle high powers up to 15 kW/m². The SEA-HP equip the specific areas of compact bases and antenna measurements chambers dedicated to telecommunications/wireless, satellite, defence,…

• Frequency range: from 300 MHz to 40 GHz.
• Maximum power handling: 15 kW/m², can be increased with forced ventilation
• Maximum temperature: + 200°C – 382°F
• Dimensions :
  • Height: from 89 to 900 mm – from 3.50’’ to 35.43’’
  • Base size: 305×305 or 610×610 mm – 12’’x12’’ or 24’’x24’’
  • Custom-made possible
• Indoor use
• Laying: glued to any flat surface or fixed on rails

Our assets:

• 25-year warranty on RF performance of absorbers
• A must-have model for high power
• REACH & RoHS Compliant
• Compliance with fire test standards: DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks
• Chamber design & overall chamber performance calculation

Range of sizes and performances depending on the need and the space available.

SEA-WM – Wedge shape absorbers

These wedge-shape absorbers are integrated into compact bases and anechoic chambers. SEA-WM are designed to ensure high performance in chambers with incidence angles above 50°. The dihedral shape of the SEA-WM, guiding the reflected wave, can be integrated into anechoic chambers for the measurement of antenna patterns or Radar Cross Section (RCS).

• Frequency range: from 200 MHz to 40 GHz.
• Maximum power handling: 1.5 kW/m²
• Maximum temperature: + 160°C – 320°C
• Dimensions:
  • Height: from 210 to 660 mm – from 8.3’’ to 26’’
  • Base size: 610×610 mm – 24’’x24’’
  • Custom-made possible
• Indoor use
• Laying: glued to any flat surface or on Velcro®

Our assets:

• SEA-WM offers you excellent physical properties
• LIV-coating available: offers brightness, flexibility, and a wide choice of colours
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks
• Chamber design & overall chamber performance calculation

Range of sizes and performances depending on the need and the space available.

SEA-WW – Walkway absorbers

Flat and rigid absorbers, their technology (PU foams wrapped into vinyl cover) allows access to the equipment in a full anechoic chamber.

• Frequency range: from 200 MHz to 18 GHz.
• Maximum power handling: 1.3 kW/m²
• Maximum temperature: + 70°C – 158°C
• Dimensions:
  • Thickness: from 200 to 780 mm – from 7.9’’ to 30.7’’
  • Standard size: 1220×610 mm – 48’’x24’’
  • Custom-made possible
• Indoor use
• Laying: on the floor, easily transportable

Our assets:

• SEA-WW specifications are taken into account when calculating the overall performance of the chamber
• Easy to transport and clean
• Customisable size and shape to suit the test site
• REACH & RoHS Compliant

Range of sizes and performances depending on the need and the space available.

SEA-MLM – Multi-layer absorbers

SEA-MLM is a premium series of broadband high-end multilayer absorbers. Two references are proposed: SEA-3LM (3 layers) and SEA-5LM (5 layers). They are used to cover all metallic surfaces, masts and antenna bases. They also contribute to the reduction of coupling effects between antennas. Despite their low apparent thickness, SEA-MLM offer high levels of absorption.

• Frequency range: from 100 MHz to 100 GHz.
• Maximum power handling: SEA-5LM = 1.2 kW/m²; SEA-3LM = 1.5 kW/m²
• Maximum temperature: + 160°C – 320°F
• Dimensions:
  • Thickness: from 18 to 350 mm – from 0.71’’ to 13.78’’
  • Base size : 610×610 mm – 2’’x2’’
  • Custom-made possible
• Indoor use
• Laying: glued to any flat surface or on Velcro®

Our assets:

• Space saving due to low thickness
• Can easily be cut to match complex surfaces
• LIV-coating available: offers brightness, flexibility, and a wide choice of colours
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks

Range of sizes and performances depending on the need and the space available.

SEA-F – Flat absorbers

Flat absorbers for covering corners in fully anechoic and semi-anechoic chambers.

• Frequency range: from 200 MHz to 40 GHz
• Typical reflectivity: -10 dB depending on the frequency
• Maximum power handling: 1.6 kW/m²
• Maximum temperature: +160°C – 320°F
• Dimensions:
  • Thickness: from 20 to 200 mm – from 0.8’’ to 8’’
  • Base size : 610 x 1220 mm – 24’’x48’’
  • Custom-made possible
• Indoor use
• Laying: glued to any flat surface or on Velcro®

Our assets:

• SEA-F offers you excellent physical properties
• Optimal quality and price
• LIV-coating available: offers brightness, flexibility, and a wide choice of colours
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks

Range of sizes and performances depending on the need and the space available.

SEA-WP – Weatherproof absorbers

SEA-WP are pyramidal absorbers sealed in a coating that guarantees the weatherproofness of the material. They are therefore used outdoors to cover metal areas or to reduce the Radar Cross Section (RCS),…

• Frequency range: from 200 MHz to 40 GHz.
• Maximum power handling: 1.3 kW/m²
• Maximum temperature: + 70°C – 158°F
• Dimensions:
  • Thickness: from 195 to 800mm – from 7.7’’ to 31.5’’
  • Standard size: 600 x 1220 mm – 6’’x47.2’’
  • Custom-made possible
• Outdoor use
• Laying: non-metallic eyelet placed into the absorber or using flanges

Our assets:

• SEA-WP offers you excellent physical properties
• Guaranteed robustness to withstand harsh environments and bad weather conditions
• Custom shape and size
• REACH & RoHS Compliant

Range of sizes and performances depending on the need and the space available.

SEA-CM – Convoluted absorbers

SEA-CM are absorbers with convoluted shape typically used to cover masts or antenna positioners in anechoic chambers. Low height absorbers, they allow to work on high frequencies.

• Frequency range: from 1 GHz to 40 GHz.
• Maximum power handling: 2 kW/m²
• Maximum temperature: + 160°C – 320°F
• Dimensions :
  • Height: from 80 to 150 mm – from 3.1’’ to 5.9’’
  • Base size: 610×610 mm – 24’’x24’’
• Indoor use
• Laying: glued to any flat surface or on Velcro®

Our assets:

• SEA-CM offers you excellent physical properties
• LIV-coating available: offers brightness, flexibility, and a wide choice of colours
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks

Range of sizes and performances depending on the need and the space available.