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Absorbers - Flexible Absorbent Material (FAM)

(3) Usage Examples (RFID/NFC)

  

Flexible Absorbent Material

(FAM)

 

    

FAM is a thin and flexible material, include soft rubber type and flexible sintered ferrite sheet with higher permeability. It can be cut any shape easily, freely arranged in space and provide effective EMI suppression in a wide frequency range (1MHz to 18GHz). Also can be a solution for RFID (Radio Frequency Identification) system on metal. It suitable for LF(125/134.2KHz) and HF(13.56MHz) bands on metal environment. It also works well in NFC (Near Field Communication)  technology application and Wireless Charger (WPC/Qi).

     

     (1) Features, Applications, Shapes        (2) Usage Examples (EMI)

     (3) Usage Examples (RFID/NFC)           (4) FAQ (RFID/NFC)

     (5) Response Frequency (RFID)            (6) Test Example for RFID

     (7) Effect Diagram                                (8) Material List, Structure

     (9)  Filter Effect Test                            (10) Magnetic Shield Test

     (11) Insertion loss                                (12) Return loss (3GHz)

     (13) Return loss (18GHz)                      (14) Permeability & How to choose FAM

                    

 

Application for RFID / NFC on metal :  

When RFID/NFC tag or RFID/NFC reader/writer attached on metal (PCB ground / metallized shielding surface / battery), the read distance will become much shorter than expect. The traditional design is to increase the space between RFID/NFC antenna and metal but cause the RFID/NFC device with a big thickness. FAM can be a solution to improve the read distance for LF (125/134.2KHz) and HF (13.56MHz) bands. After insert FAM between RFID/NFC antenna and metal surface, the read distance can recover maximum 80% efficiency than the original distance with no metal. Due to FAM with small thickness, a slight figure can be designed easily than before.    

  

  

  

     

Test Example for RFID Read Distance (Reference) :  

  

  

  

 More detail information :

  

     

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