3660 series PU foam based Hybrid absorbers for EMC anechoic chamber

Almost has the same performance in low frequency as the pyramid absorbers (with tips); but its performance in high frequency might be slightly declined

The 3660 series PU foam based Hybrid absorbers product is similar to our standard pyramid absorbers, but having the tips of the pyramids truncated. This saves space in small chambers and provides a more rugged product, eliminating the possibility of tip breakage.

PU foam based Hybrid absorber in an appropriate combination in a EMC anechoic chamber and is an ideal absorber treatment for Immunity Test Chambers (EN 1000-4-3 and equivalent specifications).

Removing 20% from the tips of pyramid absorbers (low carbon), it is the Truncated absorbers (without tips), which almost has the same performance in low frequency as the pyramid absorbers (with tips); but its performance in high frequency might be slightly declined. The advantage of such absorbers is bringing a larger net space, eliminating the tips droop, and it has a stronger resistance capability against mechanical damage.

3660-300 (300 mm height PU foam based hybrid absorbers)
3660-300 (300 mm height PU foam based hybrid absorbers)

Characteristics

  • It used to have a truncated appearance (some customers might want to keep the tips);
    it has blue color (more color for optional), it is pliable and flexible.
  • Working condition:
    • Long-time working temperature: -50°C ~ 80°C
    • Relative humidity: 55% ± 15%
  • It must be matched with ferrite tiles, to get a better broadband performance during 30MHz - 18GHz
  • There shall be matching design between ferrite tiles layer and absorbers layer, to further develop the bandwidth.
  • Oxygen index ≥29% (GB/T2406-93), which belongs to flame retardant B2 level (GB8624-1997)
  • Good environmental performance, all raw materials can meet the environmental requirements, no volatile, no smell and non-toxic.
  • Installation method: it generally uses fasteners installation or Velcro installation, which would facilitate the replacement of absorbers and the relocation of chambers. For small anechoic chambers, absorbers can be directly pasted by an environmental protective adhesive.

Schematic diagram of PU foam based EMC absorbers

Schematic diagram of 3660 series EMC hybrid absorbers

Product specification and part numbers

Part number Base size
(mm x mm)
Pyramid quantity
per unit
Unit size A x C x B
(mm x mm x mm)
Standard weight
(kg/m2)
3660-P-190 600 x 600

81 190 x 65 x 50 4
3660-P-300 36 300 x 100 x 60 7
3660-P-495 16 495 x 145 x 65 11
3660-P-700 9 700 × 195 × 130 16
3660-T-305 16 305 × 145 × 72 9
3660-T-500 9 495 × 195 × 110 10
3660-T-700 4 710 × 295 × 100 14
3660-P-1000 300 x 300 1 1000 × 300 × 150 22
3660-T-1000 600 x 600 1 1000 × 300 × 185 28

Reflection loss / Shielding performance

These values are measured under laboratory conditions.
In your situation results may differ, please read our Guarantee
Part number Reflection loss under vertical incidence (-dB @ GHz) Power handling capacity
kW/m2
0.03 0.08 0.3 0.5 1 3 6 10 18
3660-P-190 11 21 15 17 11 10 11 13 15 1.5
3660-P-300 11 21 16 17 11 13 15 20 20 1.5
3660-P-495 12 21 17 19 17 17 20 25 25 1.5
3660-P-700 14 23 20 20 18 20 25 25 30 1.5
3660-T-305 11 20 17 18 15 13 17 22 25 1.5
3660-T-500 13 23 20 20 16 18 22 25 28 1.5
3660-T-700 15 25 21 20 20 20 25 28 30 1.5
3660-P-1000 15 25 25 25 23 22 28 28 35 1.5
3660-T-1000 17 25 25 25 25 30 30 35 40 1.5

Please note:

  • For the data below 500MHz, it is obtained by low-frequency coaxial test method (GJB5239-2004);
    while for the data above 1GHz, it is obtained by far-field RCS test method (GJB2038A-2011)
  • The performance data listed in the above table is the guaranteed data, and the measured data would be equal to or better than the guaranteed data.
  • The bold part number is a stock item and can be delivered immediately
  • Certification: CE ROHS

Would you like to...

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Series
Type
Select an option:
T : Truncated
P : Pyramid
Height (mm)
Specify the height of the desired absorber in mm
* Note: The red blocks are required

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