3640 series - Broadband hybrid pyramidal absorbers

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

Solution for 3m, 5m and 10m EMC chambers in the market

These absorbers are the most popular solution for 3m, 5m and 10m EMC chambers in 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 a superb performance across 30MHz to 18GHz. The ferrite performes from 30MHz to 1GHz and the foam performes above 1GHz.

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

Broadband Pyramidal Absorber (BPA) is a low density polyurethane foam, filled with high loss dielectric material in open cell structure and finished with light blue paint. The dimension is 60cm x 60cm with 5” to 36” height pyramidal. It’s flexible and light weight, can be attached on the wall easily. It is a high performance broadband RF absorber and 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 test
  • 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

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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

3850

Silver coating

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