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the tuning frequency of an M24SR?

Question asked by truong.thao on Mar 3, 2014
Latest reply on Mar 4, 2014 by ST NFC
Dear everybody

I have read about "Using the same antenna for M24LRXXE-R and M24SRXX-Y" 
in document AN4409. It describes in table 2."Tuning parameters for M24LRXXE-R and M24SRXX-R", that the tuning frequency of an M24SRXX is 14MHz-14.4MHz. But fc in datenblatt (page75) is only 13.55Mhz - 13.56Mhz.
With which frequency can I design the antenna for the M24SR? 
Do you have any notes for the calculating the antenna for the M24SR? I only find the documents for the M24LR
Thank you and best regards