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PU foam based wedge absorbers
PU foam based wedge absorbers has the properties similar to the pyramid absorbers with same height, it also has excellent performance in 100MHz-110GHz. It is mainly applied in large compact anechoic chamber and tapered anechoic chambers, the main advantage is to reduce the back scattering of pyramid absorbers and obtain higher quietness of quiet zone.
1. Characteristics
1) Such absorbers have a wedge-shaped appearance, with blue color
(it can be selected as request)
2) Pliable and flexible, the pyramids won’t bend in long-term use,
and its absorbing properties won’t be changed within 10 years.
3) Oxygen index ≥29% (GB/T2406-93), which belongs to flame
retardant B2 level (GB8624-1997)
4) Good environmental performance, all raw materials can meet the
environmental requirements, no volatile, no smell and non-toxic.
5) Working conditions: general indoor application
Long-time working temperature: -50oC~90oC
Short-time working temperature: -100oC~120oC
Relative humidity: 55%±15%
Frequency range: 30MHz~110GHz
6) Installation method: it generally use an environmental
protective adhesive to paste the
absorbers on the shield body; when the absorbers’ height is below
500mm, Velcro
installation can be applied; furthermore, we can also adopt the
fasteners to install the
absorbers, which would facilitate the replacement of absorbers and
the relocation of
chambers.
2. Schematic diagram of PU foam based wedge absorbers
3. Product code
PXB-W［］ → “PXB-W” refers to “product code, “［］” refers to “overall
thickness”.
4. Product specification and performance
model | base size (mm*mm) | pyramid qty per unit | unit size H×L×h (mm*mm*mm) | Standard weight (kg/m2) | Size of carton (mm*mm*mm) | Qty per carton |
PXB-W200 |
600×600 | 6 | 200×10×5 | 8 | 1280×650×650 | 12 |
PXB-W300 | 6 | 300×10×7 | 10 | 1280×650×650 | 8 | |
PXB-W500 | 3 | 495×20×7.5 | 15 | 1010×650×650 | 4 | |
PXB-W700 | 600×400 | 2 | 700×20×10 | 24 | 1280×650×450 | 4 |
model | reflection loss under vertical incidence (-dB @ GHz) | power handing capacity kW/m2 | ||||||
0.5GHz | 1GHz | 3GHz | 6GHz | 10GHz | 18GHz | 40GHz |
| |
PXB-W200 |
| 25 | 32 | 35 | 42 | 48 | 50 | 1.5 |
PXB-W300 |
| 30 | 38 | 45 | 48 | 50 | 50 | 1.5 |
PXB-W500 | 20 | 35 | 43 | 50 | 50 | 50 | 50 | 1.5 |
PXB-W700 | 25 | 40 | 50 | 50 | 50 | 50 | 50 | 1.5 |
Note:
1) 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)
2) 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.
