Reading distance RFID 125kHz

Is it possible to increase the reading distance of the Seeedstudio rfid 125 kHz by changing the antenna for example ? The ideal size for my application is 18 * 18 cm. If possible, how to make one ? number of turns, size of wire …
thank’s

Hello @agul,

Welcome to RobotShop community, we are sorry for the late reply.

You can contact the manufacturer through this link and ask them directly:
http://www.seeedstudio.com/depot/index.php?main_page=support

Let us know if you need further assistance.

Sincerely,