NXP Semiconductors
AN11740
PN5180 Antenna design
AN11740
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Application note
COMPANY PUBLIC
Rev. 1.1 — 19 June 2018
345311
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(1) Side length of a square antenna.
(2) These simulation results do neither take any specific environment nor loading effects into account.
Fig 7.
EMVCo POS Reader antenna size
2.2.3 EMVCo Wave shapes
The PCD needs to send the related pulse(s): It may send an EMVCo REQA and / or
REQB.
The wave shape tests require
3. a calibrated EMVCo ReferencePICC, which is placed at each of the given position
4. a digital oscilloscope with a measurement bandwidth of 500Msamples or higher, and
5. a tool that filters and transforms the oscilloscope data into the envelope signal
according to the EMVCo test requirement.
The tool normally returns the filtered and transformed envelop as well as the
corresponding values of rise and fall times, residual carrier levels and over- and
undershoots, which must be kept within the given limits.
2.2.4 EMVCo Load modulation
The PCD needs to send a test command, which allows to check a response from the
ReferencePICC. Typically, the EMVCo loop back command sequence is used for this.
Note:
Since these tests do not replace the certification tests as required by EMVCo,
simple tests commands might be even more useful than the full EMVCo test sequence.
Such a simple test command can be easily debugged and typically allows an easier
triggering.
