冠磁企業股份有限公司

Crown Ferrite Enterprise Co.

   

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EMI / RFI / Microwave Absorbers

Flexible Absorbent Material (FAM)

(1) Basic Information

(1) Basic Information

(2) EMI/RFI Application
(3) RFID/NFC Application (4) Tests

    

    

PDF Version :

        

        

Features : 

· Provide effective EMI suppression in a wide frequency range (1MHz to 18GHz)

· Change the magnetic flux path to avoid interference other components

· Reduce the eddy current when magnetic flux close metal

· Ultra thin and extremely flexible, can be freely arranged in space

· Non-conductive adhesive backing (UL Recognized) available

· Effective in preventing resonance and suppressing coupling

· High surface resistance (106 ohms)

· Easy and fast to process

· Can be cut any shape easily

 

Applications :

· RFID (Radio Frequency Identification) systems

· RFID Digital Locks / Smart Locks

· NFC (Near field communication)

· Wireless Power Chargers (WPC / Qi)

· Computers (NB / Desktop / Tablet) and peripherals

· Digital Products

· Mobile Phones / Smart Phones / Phablet

· Wireless equipments

· Shielding Box / Dark Box

  

 

Offer Sheet Shape & Tube Shape : 

EMI / RFI Absorbers, Flexible Absorbent Material (FAM), Offer Sheet Shape & Tube Shape   

 

 

 

 

 

 

 

 

 

          

Tube Shape Item List : 

Item

FT0302

FT0504

FT0705

FT0906

OD(mm)

3.0

5.0

7.0

9.0

ID(mm)

2.0

4.0

5.0

6.0

 

Item

FT1107

FT1309

FT1510

OD(mm)

11.0

13.0

15.0

ID(mm)

7.0

9.0

10.0

  

   

Material List :  

Property

Unit

FAM1

FAM3

FAM7

Operating Temperature

oC

-40 ~ +85

-30 ~ +120

Applicable Frequency

GHz

 

1MHz ~ 3GHz

Permeability (µ’@1MHz)

-

25

50

140

Material

-

Magnetic Powder + Rubber

Sintered Ferrite Sheet

Thickness Range

mm

0.12 ~ 2.50

0.25 / 0.50 / 0.75

0.08 / 0.12 / 0.22

Max. Dimension

mm

600 x 400

130 x 130

Surface Resistance

ohm

106

109

Density

g/cm3

3.6

4.8

3.8

RoHS 2.0 Compliance

-

2011/65/EU

Halogen-Free

-

No

Yes

  

Property

Unit

FAM5A

FAM5B

FAM6

Operating Temperature

oC

-40 ~ +85

-40 ~ +155

Applicable Frequency

GHz

1MHz ~ 9GHz

Permeability (µ’@1MHz)

-

150

250

170

Material

-

Magnetic Powder + Rubber

Thickness Range

mm

0.05 ~ 0.50

Max. Dimension

mm

210x297 (A4 size)

Surface Resistance

ohm

105

Density

g/cm3

4.4

3.8

RoHS 2.0 Compliance

-

2011/65/EU

Halogen-Free

-

Yes

     

* The property data for FAM1 / FAM3 / FAM5 / FAM6 are not include adhesive tape and release paper.

* The property data for FAM7 is PET + Sintered Ferrite Sheet + adhesive tape (not include release paper).

 

 

FAM 1/3/5/6 Structure :

 (soft rubber type)

     FAM7 Structure :

(flexible sintered ferrite sheet)

EMI / RFI Absorbers, Flexible Absorbent Material (FAM), Structure for soft rubber type and flexible sintered ferrite sheet

   

 

 

      

Permeability ( µ = µ’ – j µ’’ ) :

 EMI / RFI Absorbers, Flexible Absorbent Material (FAM), Permeability ( µ = µ’ – j µ’’ )

   

  

 

 

   

How to choose FAM :

EMI / RFI Absorbers, Flexible Absorbent Material (FAM), How to choose FAM

 

 

 

 

 

 

 

 

 

 

  

Effect Diagram - Magnetic Shield :

EMI / RFI Absorbers, Flexible Absorbent Material (FAM), Effect Diagram - Magnetic Shield

 

 

 

 

FAM can change the magnetic flux path to avoid the magnetic flux affect others components.

  

     

Effect Diagram - RFID/NFC on metal :

EMI / RFI Absorbers, Flexible Absorbent Material (FAM), Effect Diagram - RFID/NFC on metal

 

 

 

 

The magnetic flux induced eddy current and generated a reverse magnetic field to offset the magnetic flux to cancel the communication. After  attached FAM between metal and RFID antenna, the communication will recover.

   

    

Effect Diagram - Wireless Power Charger :

EMI / RFI Absorbers, Flexible Absorbent Material (FAM), Effect Diagram - Wireless Power Charger

 

 

 

 

FAM can be used for wireless power charger to avoid eddy current when RX coil attached on metal and change the magnetic flux path between TX coil, RX coil, magnet.

  

        

Design Kit : 

 

 

 

 

* each item 1 pcs (100x100mm)

Kit-1 Kit-2 Kit-3 Kit-4
Thickness
0.05 ~ 0.33 mm
high permeability &
thickness < 0.22 mm
Thickness
0.25 ~ 0.50 mm
FAM1 series
FAM1-0.12 FAM5A-0.05 FAM1-0.25 FAM1-0.12
FAM1-0.20 FAM5A-0.10 FAM1-0.33 FAM1-0.20
FAM1-0.25 FAM5A-0.20 FAM1-0.50 FAM1-0.25
FAM1-0.33 FAM5B-0.05 FAM3-0.25 FAM1-0.33
FAM3-0.25 FAM5B-0.10 FAM3-0.50 FAM1-0.50
FAM6-0.05 FAM5B-0.20 FAM5A-0.30 FAM1-0.60
FAM6-0.10 FAM6-0.05 FAM5A-0.50 FAM1-1.0
FAM6-0.20 FAM6-0.10 FAM5B-0.30 FAM1-1.5
FAM6-0.30 FAM6-0.20 FAM5B-0.50 FAM1-2.0
FAM7-0.08 FAM7-0.08 FAM6-0.30 FAM1-2.5
FAM7-0.12 FAM7-0.12 FAM6-0.50     
FAM7-0.22 FAM7-0.22           

 

  

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www.cfe.com.tw       cfe@cfe.com.tw