3640 series - Broadband hybrid pyramidal absorbers

These absorbers are the most popular solution for 3m, 5m and 10m EMC chambers on the market.

Solution for 3m, 5m and 10m EMC chambers

These absorbers are the most popular solution for 3m, 5m and 10m EMC chambers on the market. They are composed of pyramidal, full-tip SAM or truncated SMT pulsing the matching layer to separate the pyramidal part from the ferrite part. Through optimization, this product has superb performance across 30MHz to 18GHz. The ferrite performes from 30MHz to 1GHz and the foam performes above 1GHz.

Prototypes have been made and the design is being tested. Results will become part of a valuable feedback loop for refining our design further.

The Broadband pyramidal absorber (BPA) is made of a low-density polyurethane foam, filled with high-loss dielectric material in an open-cell structure and it is finished with light-blue paint. The dimensions are 60cm x 60cm with a height of 5” to 36” for the pyramidal sections. The product is flexible and light weight, and can be attached to any wall easily. It is a high-performance broadband RF absorber that is widely used for Anechoic chambers.

Broadband hybrid pyramidal absorbers for 3m, 3m and 10m EMC chambers
Broadband hybrid pyramidal absorbers for 3m, 3m and 10m EMC chambers
 

Part numbers and dimensions

Part number Dimensions Tips Weight
(kg/m²)
A (mm) B (mm) C (mm)
3640-50 600 600 50 900  1.5
3640-100 600 600 96 225  2.2
3640-200 600 600 190 81  4
3640-300* 600 600 300 36  7
3640-500 600 600 495 16  11
3640-700 600 600 700 9  16
3640-1000 300 300 1000 1  22
3640-1200 400 400 1200 1  25
* In stock

Technical drawing

3640 Broadband hybrid pyramidal absorbers technical drawing
3640 Broadband hybrid pyramidal absorbers, technical drawing

Applications

  • Anechoic chambers for EMC testing
  • Dark box for mobile-phone inspection
  • RCS (Radar Cross Section measurements)
  • APM (Antenna Pattern Measurements)
  • Telecom/wireless
  • Satellite
  • High-speed electronics
  • Automotive
  • Military

Features

  • Numerically optimized design
  • 1.5 kW/m³ power-handling capability

Reflection loss

Part number  Typical reflectivity (dB)
0.03 GHz 0.08 GHz 0.3 GHz 0.5 GHz 1 GHz 3 GHz 6 GHz 10 GHz 18 GHz 40 GHz 100 GHz
3640-50             30 35 40 50 45
3640-100           30 35 40 45 50 45
3640-200         27 35 40 45 50 50 48
3640-300*       25 35 40 50 50 50 50 47
3640-500     20 30 40 45 50 50 50 50 48
3640-700   8 25 35 40 50 50 50 50 50 48
3640-1000   11 30 40 45 50 50 50 50 50 47
3640-1200 5 13 35 40 45 50 50 50 50 50 47
* In stock
Holland Shielding Systems B.V. Holland Shielding Systems B.V.
Rated 4.6/5 based on 8 customer reviews
In stock
Product description:

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Series
Height (mm)
PU foam based pyramid absorbers with a height of 300 mm can be delivered from stock
* Note: The red blocks are required

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