The purpose of this study was to solve the problem of maximum detection rangee of RFID system which generally activates 13.56MHz, since most systems that are on the market recognize tag in between 5 Cm . In addition, I'd like to cover the problem of detection rates which are not very good, by providing some solutions. First, this study was dealt with constitution and special features of simple RFID. Second, this study made stacked loop antenna and Ferrite loop antenna, to improve detection range of RFID reader system's antenna which activates 13.56MHz and adapted RFID reader to find out improvement compare to the existing antenna through the experiment. In conclusion, this study described some benefits when applied newly made two antennas to the existing system.