iCLASS SE Reader Module Hardware Developer’s Guide, SE3200-902, Rev. C.1
Page 43 of 52 February 2014
7.4.4 ULPM Card Detection Range
The card detection range in Ultra Low Power Mode depends on the loading effect the
transponder imposes on the iCLASS SE Reader Module’s antenna. That means that
cards with lower loading effect will generally have a shorter detection range.
The following table provides an overview of typical detection ranges with some
transponders.
Table 26: ULPM Card Detection Ranges 4090A10 HF Antenna
Typical Detection
Range[mm]
MIFARE Ultralight (MF0ICU1) NXP Semiconductors 14.51 85
MIFARE Classic (MF1S50) NXP Semiconductors 14.04 95
MIFARE DESFire (MF3ICD40) NXP Semiconductors 15.37 70
iCLASS 32k HID Global 13.63 95
FeliCa RC-S962 Sony Corporation 13.52 95
Note: If the card detection range exceeds the actual read range, the reader may wake
up but not read the transponder successfully at this distance.
7.4.5 RF Properties
Provided is an overview on the RF properties of the 4090A11 HF antenna in
combination with the iCLASS SE Reader Module. The modulation waveforms were
measured at a distance of 17mm (highest field strength). Parameters may vary per unit
due to component tolerances. The compliance of the modulation waveforms is
essential to ensure the interoperability with various transponders in the field.
All measurements were performed in accordance to the ISO/IEC10373-6 standard.
Note: The following graph shows that at distances smaller than 17mm, the detuning of
the Reference PICC used for the measurement causes the field strength to decrease.
Observe similar behavior with transponders that introduce a loading effect of similar
magnitude.
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