FAM3
Flexible Absorbent Material
Features
Provide effective EMI suppression over a wide
frequency range (10MHz to 18GHz)
Ultra thin and extremely flexible, can be easily
fitted to a wide range of form-factors
UL approved non-conductive adhesive backing
available as an option
Highly effective in preventing resonance and
suppressing coupling
High surface resistance (10
8
-10
9
ohms)
Manufacturing friendly solution
Applications
Notebooks, PCs, workstations
LNBs for satellite systems
Mobile communications equipment
Base stations for mobile phones and handsets
Peripheral devices for computers
Wireless equipment
Mobile phones
High speed clocks and timing devices
RFID (Radio Frequency Identification) systems
NFC (Near field communication) systems
Wireless chargers
Can be cut to any shape
RFID Applications
Besides the suppression and control of EMI issues, FAM can be a solution for
RFID devices as well.
FAM is highly suitable for LF(125KHz) and HF(13.56MHz) bands. FAM can
deal with complex issues such as when the RFID Reader/Writer or RFID tag
is attached to a metal surface. When used in this way FAM can reduce design
complexity and significantly lower the total cost of ownership.
Material List
Property
Operating Temperature
Applicable Frequency
Thickness Range
Max. Dimension
Surface Resistance
Hardness
Specific Gravity
Elongation
Tensile Strength
Thermal Conductivity
RoHS Compliance
2002/95/EC -
Halogen-Free
Flame Retardant
Unit
˚C
GHz
mm
mm
ohm
Shore A
g/cm
3
%
Kgf/cm
2
W/mK
-
-
-
FAM3
-20 to 80
0.01 to 18
0.05 to 0.50
210 x 297 (A4)
10
8
50
2.7
2.5
30
0.5
Yes
Yes
Equivalent to
UL94V-0
Test Method
-
-
-
-
ASTM D257
ASTM D2240
ASTM D792
ASTM D412
ASTM D412
ASTM D5470
-
-
-
Sheet Shape Examples
Cable wrap
Flat cables
IC covers
IC interface
Interface between
case and board
Tel:
+44 20 8133 2062
Email:
sales@tglobaltechnology.com
Web:
www.tglobaltechnology.com
Skype:
tglobal.technology
Material List
Item
0.05mm
0.10mm
FAM3
0.20mm
0.30mm
0.50mm
0.9 GHz
-0.21dB (4.7%)
-0.46dB (9.9%)
-0.62dB (13.4%)
-0.76dB (16.2%)
-1.10dB (22.6%)
1.8 GHz
-0.50dB (11.0%)
-0.88dB (18.3%)
-1.05dB (21.8%)
-1.20dB (24.2%)
-1.50dB (29.0%)
2.4 GHz
-0.84dB (17.8%)
-1.10dB (22.6%)
-1.40dB (27.4%)
-1.70dB (32.4%)
-2.30dB (40.9%)
2 of 4
Application Examples
[Shielding Box] [GPS]
[Power Supply] [IC]
[Mobile Phone] [NB]
[Battery] [NFC]
[RFID tag/reader]
[Wireless Charger]
Tube Shape
Item
OD (mm)
ID (mm)
FT0302
3.0
2.0
FT0504
5.0
4.0
FT0705
7.0
5.0
FT0906
9.0
6.0
FT1107
11.0
7.0
*Test results may vary from application to application
FT1309
13.0
9.0
FT1510
15.0
10.0
Return Loss – Frequency:
Return Loss (dB)
Absorb Rate (%)
0.5
11
1
21
2
37
3
50
4
60
5
69
6
75
7
80
8
86
9
89
10
90
20
99
30
99.9
Tel:
+44 20 8133 2062
Email:
sales@tglobaltechnology.com
Web:
www.tglobaltechnology.com
Skype:
tglobal.technology
Test Example
Notebook = FAM (before & after)
3 of 4
Horizontal
Frequency(MHz)
Before (dBuV)
After (dBuV)
Attenuation
(dBuV)
1
65.1
23.8
12.0
11.8
2
91.7
21.6
16.9
4.7
3
96.3
18.9
15.4
3.5
4
32.7
27.1
5.6
5
30.1
28.0
2.1
6
33.5
31.2
2.3
7
30.2
27.5
2.7
8
29.7
24.7
5.0
9
36.4
31.1
5.3
10
34.3
31.2
3.1
11
39.9
32.9
7.0
12
38.9
36.9
2.0
13
600.0
40.2
36.6
3.6
14
700.0
36.8
32.7
4.1
15
733.0
37.0
30.5
6.5
16
767.0
31.6
25.9
5.7
17
800.0
35.6
30.7
4.9
18
833.0
27.9
23.0
4.9
19
867.0
27.6
24.6
3.0
225.6 241.0 267.2 270.7 275.7 300.0 334.0 399.0 466.0
Vertical
Frequency(MHz)
Before (dBuV)
After (dBuV)
Attenuation
(dBuV)
1
86.1
28.0
25.1
2.9
2
91.3
33.1
29.0
4.1
3
30.4
24.9
5.5
4
28.2
22.8
5.4
5
28.8
26.2
2.6
6
28.8
25.8
3.0
7
32.3
25.3
7.0
8
27.3
23.9
3.4
9
30.2
25.8
4.4
10
28.4
24.7
3.7
11
31.7
26.8
4.9
12
24.5
29.6
4.9
13
534.0
43.8
40.6
3.2
14
550.0
36.7
33.3
3.4
15
633.0
36.3
32.7
3.6
16
665.0
30.9
27.8
3.1
17
701.0
28.0
24.1
3.9
18
709.0
34.9
32.4
2.5
19
866.0
38.7
25.9
2.8
134.5 221.3 230.6 261.0 275.3 285.7 290.7 295.4 309.0 333.0
Tel:
+44 20 8133 2062
Email:
sales@tglobaltechnology.com
Web:
www.tglobaltechnology.com
Skype:
tglobal.technology
LF/HF RFID on metal application:
4 of 4
When a RFID tag or RFID reader/writer is attached to a metal surface, the read distance will become much shorter than expected. The traditional
solution is to increase the space between the RFID antenna and the metal but this can be detrimental when a thin device is desired. FAM can be an
excellent solution to improve the read distance for both LF (125/134.2KHz) and HF (13.56MHz) bands. FAM is inserted between the RFID antenna and
the metal surface to give an improvement of read distance of up to 80%. This can significantly improve the device footprint and overall efficieny.
Frequently Asked Questions:
How to use FAM with an RFID tag?
Place the cut FAM pad into the cavity and ensure good adhesion. When attaching to a metal surface FAM should not be attached to the antenna side
How to use FAM for RFID reader/writer applications?
Can I use FAM for UHF RFID applications?
Insert the pre-cut FAM pad between the antenna and PCB. The antenna side should not be attached to the metal surface directly.
FAM works well in LF/HF RFID applications but is not suitable for UHF RFID (Electric-field) applications
How do I select the correct FAM thickness?
What FAM dimension should I use?
Are the faces of FAM the same?
FAM is available in a number of standard thicknesses. T-Global engineers can offer application advice for design and engineering applications
The FAM pad should cover the entire RFID antenna area for optimum performance
Unless an adhesive is applied there is no need to mount the FAM pad in a specific orientation.
Read Distance (Reference):
ISO
Card
Icode2
TI 2048
EM4100
No
On
Metal Metal
11
14
19
0
0
4.5
FAM1
0.2
mm
5.5
4
8
0.25
mm
6.5
5
9
0.33
mm
6.5
5.5
9.5
0.6
mm
8
9
12
1.0
mm
7.5
7
7.5
1.5
mm
7
7
5
2.0
mm
7
6
4
2.5
mm
7
6
4
0.25
mm
6
4.5
9.5
FAM3
0.50
mm
6.5
8.5
12
0.75
mm
7
9
9
0.05
mm
4.5
5.5
11
0.1
mm
8
7
12
FAM5
0.2
mm
7
7
4
0.3
mm
6.5
5.5
4
0.5
mm
6
5
3
• The read distance unit is CM
• Different reader will cause different read distance
Tel:
+44 20 8133 2062
Email:
sales@tglobaltechnology.com
Web:
www.tglobaltechnology.com
Skype:
tglobal.technology
京公网安备 11010802033920号
EEWORLD
