NXP Semiconductors
AN11740
PN5180 Antenna design
AN11740
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
Application note
COMPANY PUBLIC
Rev. 1.1 — 19 June 2018
345311
6 of 62
(1) A PCD must always support the classes 1, 2, and 3. The Classes 4, 5 and 6 are optional.
Fig 3.
PICC Classes according to the ISO/IEC 14443
The PCD antenna coil sizes are not specified. So, for ISO/IEC 14443 compliant readers
all different sizes of antenna coils from a few 10 mm
2
up to 20cm diameter can be found
in various shapes.
The ISO/IEC 14443 does not specify an operating volume. The reader manufacturer
needs to guarantee that within the operating volume - that he himself defines - all related
ISO/IEC 10373-6 tests can be passed.
The compliance tests require calibrated ReferencePICCs, as defined in ISO/IEC10373-6.
The schematic of such ReferencePICC is shown in Fig 4. For each PICC Class there is
one Reference PICC, which needs to be calibrated according to the required
measurement. Practically it makes sense to use one calibrated ReferencePICC for each
measurement case.
