FF Flexible lossy sheet microwave foam absorber
EMC Factory Technical data bulletin
FF Flat Foam Absorber
Flexible lossy flat foam microwave absorbing material
FF (Flat Foam) is a series of flat polyurethane soft foam microwave absorbing materials, which are processed by special technology. Lightweight, flexible, available in different thicknesses and different lossy grades.
FFS (Flat Foam Single) is a single-layer flat polyurethane flexible foam microwave absorbing material.
FFD (Flat Foam Double) is a double-layer flat polyurethane flexible foam microwave absorbing material.
FFM (Flat Foam More) is a multi-layer flat polyurethane flexible foam microwave absorbing material.
FFG (Flat Foam Glossy) is a glossy-coated flat polyurethane flexible foam microwave absorbing material.
Applications:
*FF sheets are mainly used in closed cabinet applications, such as ampliers,RF-radio’s
Oscillators to improve their Q-factor.
*FF sheets are also used to attenuate surface currents on metal structures.
*Isolation between RF-systems and also improvement of reflectivity level of reflecting objects.
Characteristic:
*FF sheet generally has no flame retardancy, special requirements can increase the flame retardancy.
*FF sheet operating temperature -50~+80℃. Higher operating temperatures can be customized.
* FF is not suitable for outdoor use. If want for outdoor, pls contact us.
*The standard outside demensions 500mmx500mm, it can be processed into special size and shape by knife, scissors or punching machine.
*FF is not suitable for direct contact with current-carrying parts due to its conductivity.
*FF can also be supplied with a self-adhesive tape to ease installation.
*FF type is generally attached to a metal base. If the non-metal substrate is attached, add an absorbing layer or metal substrate on the surface.
EMC Factory Technical data bulletin
FFS（Flat Foam Single）
is a single-layer flat polyurethane flexible foam microwave absorbing material.
Parameters table：
|
Grade |
Thickness mm |
Weight kg/m² |
Size mm |
Center Frequency GHz |
Normal Incidence Reflectance -dB |
|
FFS-2G-8 |
8 |
1.0 |
500x500x8 |
2 |
5 |
|
FFS-3G-15 |
15 |
|
500x500x15 |
3 |
17 |
|
FFS-3G-18 |
18 |
2.0 |
500x500x18 |
3 |
17 |
|
FFS-3G-25 |
25 |
|
500x500x25 |
3 |
22 |
|
FFS-4G-8 |
8 |
1.0 |
500x500x8 |
4 |
11 |
|
FFS-5.5G-10 |
10 |
1.8 |
500x500x10 |
5.5 |
17 |
|
FFS-9.4G-6 |
6 |
0.8 |
500x500x6 |
9.4 |
17 |
|
FFS-12G-4 |
4 |
0.5 |
500x500x4 |
12 |
17 |
|
FFS-15G-3 |
3 |
0.4 |
500x500x3 |
15 |
15 |
✬The standard thickness of FFS is 3,4,5,6,10,15,20mm etc.
✬The thickness of the material determines the frequency,the frequency of use is lower,and the material is slightly thicker.
✬Customized sizes and shapes can be supplied.
Parameter table：
|
Grade |
Thickness mm |
Waveband |
Center Frequancy GHz |
Normal Incidence Refectance -dB |
|
FFS-3mm Ku |
3 |
Ku |
12 |
12 |
|
FFS-4mm Ku |
4 |
Ku |
12 |
15 |
|
FFS-3mm C |
3 |
C |
4 |
3 |
|
FFS-4mm C |
4 |
C |
4 |
5 |
EMC Factory Technical data bulletin
FFS also has a wider bandwidth,and the reflectivity at different frequencies is listed below:
Parameter table：
|
Grade |
Thickness mm |
Weight kg/m2 |
Reflectivity(-dB) at normal incidence at a given frequency (GHz) |
|||
|
8.4 |
9.4 |
12 |
15 |
|||
|
FFS-5mm,9.4GHz(X) |
5 |
0.65 |
15 |
17 |
15 |
10 |
|
Grade |
Thickness mm |
Weight Kg/m2 |
Reflectivity(-dB)at normal incidence at a given frequency (GHz) |
|||
|
4 |
5 |
10 |
15 |
|||
|
FFS-3mm,4GHz |
3 |
0.45 |
4 |
4 |
10 |
10 |
|
FFS-4mm,4GHz |
4 |
0.55 |
5 |
5 |
13 |
10 |
|
FFS-6mm,4GHz |
6 |
0.8 |
7 |
9 |
17 |
13 |
|
Grade |
Thickness mm |
Frequency GHz |
Reflectivity at normal incidence -dB |
|
FFS-8mm,2GHz |
8 |
2 |
5 |
|
FFS-12mm,1GHz |
12 |
1 |
3 |
EMC Factory Technical data bulletin
FFD（Flat Foam Double）
is a double-layer flat polyurethane flexible foam microwave absorbing material.
✬Double layers flat polyurethane flexible foam microwave absorbing material for 8~18GHz,
4~18GHz ,2~18GHz.
Compared with the general single-layer foam absorbing material, the foam with double-layer impedance gradient has better electrical properties in a wider frequency band.
Parameter table：
|
Grade |
Thickness mm |
Weight Kg/m2 |
Frequency GHz |
Reflectivity(-dB) at normal incidence |
|
|
Averages |
worst |
||||
|
FFD-8~18GHz |
5 |
0.7 |
8~18GHz |
11 |
8 |
|
FFD-4~18GHz |
8 |
1.1 |
4~18GHz |
11 |
8 |
|
FFD-2~18GHz |
15 |
2.0 |
2~18GHz |
11 |
8 |
FFM（Flat Foam More）
is a multi-layer flat polyurethane flexible foam microwave absorbing material.
Parameter Table:
|
Grade |
Thickness mm |
Size mm |
Reflectivity(-dB) at normal incidece at a givenfrequency(GHz) |
||||||
|
15 |
10 |
5 |
3 |
2 |
1.5 |
1 |
|||
|
FFM-10 |
10 |
500x500x10 |
20 |
15 |
10 |
|
|
|
|
|
FFM-20 |
20 |
500x500x20 |
20 |
17 |
15 |
10 |
|
|
|
|
FFM-30 |
30 |
500x500x30 |
20 |
18 |
17 |
14 |
|
|
|
|
FFM-40 |
40 |
500x500x40 |
20 |
20 |
20 |
17 |
15 |
13 |
|
|
FFM-60 |
60 |
500x500x60 |
20 |
20 |
20 |
20 |
17 |
15 |
13 |
EMC Factory Technical data bulletin
FFG（Flat Foam Glossy）
is a glossy-coated flat polyurethane flexible foam microwave absorbing material.
FFG film-coated flat plate microwave absorbing material, its performance is the same as that of FFS, FFD, FFM flat foam.
The surface is treated with film, which is wear-resistant, waterproof, anti-aging, and not easy to drop powder.
Color, size, shape, can be customized
————————————————
The information in this technical bulletin,
although believed to be accurate, is not to be
taken as a warranty for which Liaoning Shunbang Microwave Technology Co.,Ltd assumes legal responsibility, nor as
