Radio frequency identification tag and radio frequency identification tag antenna

A radio frequency identification tag and a radio frequency identification tag antenna are provided to maximize a recognition distance by receiving a data from a RFID reader without the loss of electromagnetic wave. An RFID tag comprises an antenna(300) and a chip, and antenna comprises third microstrip lines(331,333,335) through dielectrics(311,313). A first dielectric comprises a first and a second side, and the first side is a ground side while a second side is not contacted with the first side. A second dielectric comprises a third and a fourth page, and a third side is contacted with a part of the second side while a fourth page is not contacted with the third side.