HID iCLASS SE - RF Interfaces; HF Interface (13.56 MHz)

iCLASS SE Reader Module Hardware Developer’s Guide, SE3200-902, Rev. C.1
Page 27 of 52 February 2014
6 RF Interfaces
Depending on the configuration, the iCLASS SE Reader Module offers up to two
different RF interfaces.
• HF interface for 13.56 MHz transponders
• Prox interface for 125 kHz transponders (SE32x0APx only)
6.1 HF Interface (13.56 MHz)
The HF interface is optimized for operation with 50Ω tuned antennas.
Figure 7: HF Interface
The impedance of 50Ω allows for integrated antennas, as well as remote antennas
connected through a coax cable. Use a coaxial connection whenever operating the
module in Normal Power Mode, if possible.
SIO Reader Board
P
401
Tuning
Network
Antenna
Pin1-
ATX
Pin2-
GND
50 Ohm
Coax Cable
Figure 8: HF Interface with Coax Cable