What are the specifications of coil on-chip in em4102

I,m trying to design a rfid system with the em4102 transponder. My goal is to optimize the read range in wich em4102 can be read. Anybody knows which is the coil on-chip that it is used in this tag and what are its specificatinss? I mean, quality factor,number of windings, area,....

Thanks for everybody??????

Datasheet is here:

http://www.emmicroelectronic.com/web.../EM4102_DS.pdf

You can send questions to the manufacturer via this email address:

info@emmicroelectronic.com