User's Manual

veriCLASS Hardware Specification VP3500 Reader Board, 3500-906
5 RF Interface
The VP3500A00 reader board offers one integrated antenna compliant with the EMV Contactless
requirements. The tuning is optimized for operation with ISO/IEC14443 Type A & B credentials.
5.1 Operating Field Strength
The magnetic field strength was measured in accordance to ISO/IEC10373-6 (16.5MHz resonance
frequency of reference PICC).
The measurements were taken for a concentric arrangement between reference PICC and test PCD
in four different distances.
The field strength may vary slightly between different reader boards due to production tolerances.
Note: Metal or ferrite material in proximity of the antenna will lead to detuning effects, which may
cause major changes in the RF properties.
Table 6: Field Strength
Distance [mm]
2 7.5 12 20
H [A/m]
6.27 5.83 5.38 4.29
1.5
2.5
3.5
4.5
5.5
6.5
7.5
0 5 10 15 20 25
Distance [mm]
H [A/m]
Figure 5: Operating Field Strength
Page 16 of 28
March 2011
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