HELP: microwave RFID reader

Hi all,
Could anyone give me some informations and suggestions about design of 2.45GHz RFID reader?
Thanks a lot!

The manufacturers of the complete system have extensive application notes. Each vendor probably has a different protocol. I know of one company which made the readers for their own proprietary use and they had to sign a special agreement with the chip set vendor and pay a licensing fee.

Are there any standards in this frequrency as ISO14443 in 13.56M?