Antenna Coil

7/29/2019 Antenna Coil

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RFID Testlab page 1MIFARE

® Certification Institute

Document 9001-1 rev. 2.4

RFID TestlabMIFARE


Document Nr. 9001-1

Test PCD Antenna PCB part number: 9001-1 V20

References:Proximity: ISO/IEC 10373-6:2001 for bit rate fc/128

ISO/IEC 10373-6:2001/FDAM 5:2005 for bit rates fc/64, fc/32 and fc/16ISO/IEC CD 10373-6.2 (22.12.2008)This design complies with ISO/IEC 10373-6 draft rev. 2.

Vicinity: ISO/IEC 10373-7:2008RFID: ISO/IEC TR 18047-3

1. Schematic

The layout of the impedance matching network was designed to hold either the componentsfor the basic bit-rate fc/128 version of ISO/IEC 10373-6:2001 as well as ISO/IEC 10373-7,

ISO/IEC TR 18047-3 and ECMA-356 or for the high bit-rates (fc/64, fc/32 and fc/16) versionof ISO/IEC 10373-6:2001/FDAM 5:2007.

Following draft rev. 2 of ISO/IEC 10373-6, the resistor Rext is wired on the ground side of theantenna coil.

Note: Fitting for ISO/IEC 10373-7, ISO/IEC TR 18047-3 and ECMA-356 is the same as for fc/128.






Rext depends on the usable bit-rate according to the following table.

Impedance

matching networkfor bit-rate of Hmax Rext value Parts Value Rext - Circuit

fc/1281) 12 A/m 0.94 Ohm R1 …. R5 4.7 Ohm

fc/64, fc/32, fc/162) 7.5 A/m 4.7 Ohm R1A … R4A 4.7 Ohm

1) Also for ISO/IEC 10373-7, ISO/IEC TR 18047-3 and ECMA-356

2) May also be used for fc/128

The input impedance shall be adjusted to (50±5) Ohms at a phase angle of ±5 degrees at theoperating frequency of 13.56 MHz by C4 (and optionally C1c).

2. Parts list

2.1 Fitting for bit rate fc/128:

Reference Part Value Notes

C1a Capacitor, ceramics 47 pF 200VDC, COG

C1b Capacitor, ceramics --- optional1)

C1c Capacitor, ceramics --- optional1)

C2 Capacitor, ceramics 150 pF 200VDC, COG


C4 Trim-capacitor 4.2 – 20 pF e.g. Murata TZ03R300F169B00

R1 – R5 Power resistors 5 x 4.7 Ohm2)

10W thick film, low inductance,e.g. BI technologies BPC 10

J1 SMB edge connector e.g. Radiall R 114 665 000

1) Optional, adjust for Zin = 50 Ohms

2) Total resistance: 0.94 Ohm

Alternative fitting: C1a = C1b = 22pF, C2 = C3 = 100pF






2.2 Fitting for bit rates fc/64, fc/32 and fc/16:

Reference Part Value Notes

C1a Capacitor, ceramics 47 pF 200VDC, COG

C1b Capacitor, ceramics 33 pF 200VDC, COG

C1c Capacitor, ceramics --- optional1)



C4 Trim-capacitor 5 – 30 pF e.g. Murata TZ03R300F169B00

R1A – R4A Power resistors 4 x 4.7 Ohm2)

10W thick film, low inductance,e.g. BI technologies BPC 10

J1 SMB edge connector e.g. Radiall R 114 665 000

1) Optional, adjust for Zin = 50 Ohms

2) Total resistance: 4.7 Ohm

Note: For the fc/128 version fit resistors in places R1 … R5 only for the fc/64, fc/32 and fc/16 version fit places R1A … R4A only.






3. Printed circuit board layout

Note: For the fc/128 version fit resistors in places R1 … R5 only for the fc/64, fc/32 and fc/16 version fit places R1A … R4A only.

Antenna Coil

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