Where can I buy RFID tag chip online?

Hello everyone,

I want to design and fabricate RFID tag for my master studies. But first of all I need to identify the impedance of the chip that I am going to use later. I need to match the antenna and the chip impedance to get the optimum tag performance. Is anyone here know where can I buy RFID chip online? Can anyone give me links for that online shop? Thank you.

You can try here www.rfidtag.cz , it is not online sale but they are able to sell UHF RFID chips from Impinj .

Thanxx for your info Libor124 :)