3

Metal

Antenna tag

Antenna tag

Eddy current

generation

(Magnetic flux

attenuation)

3M FFDM

Magnetic Flux

Metal

Improve NFC/RFID Antenna Read Range with

3M Flux Field Directional Materials (FFDM)

Improve Power Transfer Efficiency and Range

with 3M Flux Field Directional Materials (FFDM)

Transmit and

Read Source

Antenna

3M Solution: Thin / high permeability, low signal loss

FFDM (Optimized to 13.56MHz)

3M Flux Field Directional Materials EM80KM and RFIC30 improve

EM energy transfer via inductive coupling (short range) or magnetic

coupled resonance (longer range)

3M Flux Field Directional Materials EM16TF and RFIC15 reduce

eddy current losses and improve read range

3M Solution: High permeability, low energy loss FFDM

at operating frequencies

3M Flux Field

Directional

Materials

Receiving Antenna Coil

Sending Antenna Coil

3M FFDM

3M FFDM Battery/Metal

B

z

3M FFDMs can be used to provide magnetic shielding of stray field

generating devices or materials that impact neighbor device or

component performance (i.e. inductor, wireless power, etc.).

Antenna

Metal/Battery

Antenna on polyimide

carrier. EM field along

Y-Axis in free space

Antenna with 3M FFDM between the antenna

and metal/battery parts. EM field strength

increased significantly with 3M FFDM use.

Antenna near metal or battery surface.

EM field significantly reduced due to eddy current

losses of EM field into the battery/metal parts.

Side view of antenna with

3M FFDM between antenna

and metal/battery surface.

3M FFDM

Antenna

3M FFDM

Metal/

Battery

25

20

15

10

5

0.1

1

10

Frequency (MHz)

100

Vertical to Mag Field

Parallel to Mag Field

H-Field of Device

No Magnetic Shielding

H-Field of Device

FFDM Magnetic Shielding

Strong

Mag. Field

Component

near Strong

H-Field

Component

near Weak

H-Field

3M FFDM

Sheet

Material

Strong

Mag. Field

Weak

Mag. Field

3M FFDM Type EM80KM

0.02 mm Soft Magnetic Layer Thickness

KEC Magnetic Field Test Method

80 mm x 80 mm sample/40 mm plate s hole size

140

120

100

80

60

40

20

0

10M

100M

Frequency (Hz)

AB5016RF